article_id stringlengths 9 15 | section_id stringclasses 5
values | document stringlengths 503 67.8k | summary stringlengths 205 16.2k | abstract stringlengths 293 26.7k |
|---|---|---|---|---|
math0207114 | i | let @xmath0 be an arrangement of @xmath1 ordered hyperplanes in @xmath2 , and let @xmath3 be a local system of coefficients on @xmath4 , the complement of @xmath5 . the need to calculate the local system cohomology @xmath6 arises in various contexts . for instance , local systems may be used to study the milnor fiber o... | we study the gauss - manin connection for the moduli space of an arrangement of complex hyperplanes in the cohomology of a nonresonant complex rank one local system . aomoto and kita determined this gauss - manin connection for arrangements in general position . we use their results and an algorithm constructed in this... | we study the gauss - manin connection for the moduli space of an arrangement of complex hyperplanes in the cohomology of a nonresonant complex rank one local system . aomoto and kita determined this gauss - manin connection for arrangements in general position . we use their results and an algorithm constructed in this... |
1404.2825 | c | let us now briefly discuss the main results in this paper and their consequences . for the setting of simple decoders with known collusion channels @xmath26 , we have shown how to choose the score functions @xmath46 in the score - based framework , as well as how to choose the threshold @xmath45 and code length @x... | is further shown to be a universal decoder , able to deal with arbitrary attacks and achieving the uninformed capacity . this universal decoder is shown to be closely related to the lagrange - optimized decoder of oosterwijk et al . and the empirical mutual information decoder of moulin . | we study the large - coalition asymptotics of fingerprinting and group testing , and derive explicit decoders that provably achieve capacity for many of the considered models . we do this both for simple decoders ( fast but suboptimal ) and for joint decoders ( slow but optimal ) , and both for informed and uninformed ... |
1309.0840 | i | the problem of deducing the action of an unknown quantum channel by gathering statistics from repeated measurement is called _ process tomography_. in general , one must measure a set of @xmath2 distinct observables in order to uniquely identify a given channel @xmath5 acting on a @xmath0-level quantum system , owing t... | we study the number of measurements required for quantum process tomography under prior information , such as a promise that the unknown channel is unitary . we introduce the notion of an interactive observable and we show that any unitary channel acting on a-level quantum system can be uniquely identified among all ot... | we study the number of measurements required for quantum process tomography under prior information , such as a promise that the unknown channel is unitary . we introduce the notion of an interactive observable and we show that any unitary channel acting on a-level quantum system can be uniquely identified among all ot... |
1604.08280 | i | symmetry and topology are two foundational principles that shape our understanding of matter . in the last decade , our understanding of their interplay has led to dramatic progress in our understanding of topological electronic phases . a hallmark of this development is the topological insulator . insulating states wi... | we study the problem of resonant tunneling through a quantum dot in a spinful luttinger liquid . for a range of repulsive interactions , we find that for symmetric barriers there exist resonances with a universal peak conductance that are controlled by a non - trivial intermediate fixed point . we show that the problem... | we study the problem of resonant tunneling through a quantum dot in a spinful luttinger liquid . for a range of repulsive interactions , we find that for symmetric barriers there exist resonances with a universal peak conductance that are controlled by a non - trivial intermediate fixed point . this fixed point is also... |
0912.0362 | i | metamaterials are artificial structures having negative refractive indices for some wavelengths @xcite . while natural materials having such properties are not known , it was the initial paper @xcite that sought to realize artificial metamaterials which triggered the rapidly increasing interest in this topic . over th... | when both refractive index and layer thickness of a mixed stack are random , the transmission length in the long - wave range of the localized regime exhibits a quadratic power wavelength dependence with different coefficients of proportionality for mixed and homogeneous stacks . moreover , the transmission length of a... | we study the propagation and localization of classical waves in one - dimensional disordered structures composed of alternating layers of left- and right - handed materials ( mixed stacks ) and compare them with structures composed of different layers of the same material ( homogeneous stacks ) . for weakly scattering ... |
0912.0362 | c | we have studied the transmission and localization of classical waves in one - dimensional disordered structures composed of alternating layers of left- and right - handed materials ( m - stacks ) and have compared this to the transport in homogeneous structures composed of different layers of the same material ( h - st... | we study the propagation and localization of classical waves in one - dimensional disordered structures composed of alternating layers of left- and right - handed materials ( mixed stacks ) and compare them with structures composed of different layers of the same material ( homogeneous stacks ) . for weakly scattering ... | we study the propagation and localization of classical waves in one - dimensional disordered structures composed of alternating layers of left- and right - handed materials ( mixed stacks ) and compare them with structures composed of different layers of the same material ( homogeneous stacks ) . for weakly scattering ... |
1106.1170 | i | the spiral arms of our galaxy have been typically characterised by radio observations of the 21-cm line of neutral hydrogen , giant hii regions , co emission , and optical data of young o and b stars ( e.g. @xcite ) . @xcite used fir and nir emission from the cobe / dirbe to fit a model for the spiral arms in the stell... | we study the spiral arm influence on the solar neighbourhood stellar kinematics . as the nature of the milky way ( mw ) spiral arms is not completely determined , we study two models : the tight - winding approximation ( twa ) model , which represents a local approximation , and a model with self - consistent material ... | we study the spiral arm influence on the solar neighbourhood stellar kinematics . as the nature of the milky way ( mw ) spiral arms is not completely determined , we study two models : the tight - winding approximation ( twa ) model , which represents a local approximation , and a model with self - consistent material ... |
1106.1170 | i | few studies have focused on the spiral arm effects on the local velocity distribution . moreover , all of them modelled the spiral arm potential following the twa . we have seen that , despite being uncertain , the observational evidences for the mw arms density contrast , and especially , the pitch angle , suggest tha... | we perform test particle simulations after tuning the two models to the observational range for the mw spiral arm properties . we explore the effects of the arm properties and find that a significant region of the allowed parameter space favours the appearance of kinematic groups . the velocity distribution is mostly s... | we study the spiral arm influence on the solar neighbourhood stellar kinematics . as the nature of the milky way ( mw ) spiral arms is not completely determined , we study two models : the tight - winding approximation ( twa ) model , which represents a local approximation , and a model with self - consistent material ... |
1110.1981 | i | when studying global properties of smooth , singular maps , a typical approach is to first solve problems locally , and then glue the local solutions together . when the map @xmath9 in question is stable , the typical local situation is the following : singularities of @xmath9 are found along stratified subsets of sour... | we study the structure of classical groups of equivalences for smooth multigerms , and extend several known results for monogerm equivalences to the case of mulitgerms . in particular , we study the group of source- and target diffeomorphism germs , and its stabilizer . for monogerms it is well - known that if is fini... | we study the structure of classical groups of equivalences for smooth multigerms , and extend several known results for monogerm equivalences to the case of mulitgerms . in particular , we study the group of source- and target diffeomorphism germs , and its stabilizer . for monogerms it is well - known that if is fini... |
1410.7161 | i | in their seminal work , de gennes and fisher @xcite pointed out that the spatial restriction of thermal fluctuations should lead to an effective force . due to its analogy with the casimir effect @xcite , where the spatial restriction of quantum fluctuations leads to a force , it is called thermal , thermodynamic or cr... | we study the thermodynamic casimir force for films with various types of boundary conditions and the bulk universality class of the three - dimensional ising model . to this end it turns out that also for the film geometry a substantial reduction of the statistical error can achieved . these are implemented by free bou... | we study the thermodynamic casimir force for films with various types of boundary conditions and the bulk universality class of the three - dimensional ising model . to this end we perform monte carlo simulations of the improved blume - capel model on the simple cubic lattice . in particular , we employ the exchange or... |
1410.7161 | c | we study the thermodynamic casimir force by using monte carlo simulations of lattice models . in particular we are concerned with the bulk universality class of the three - dimensional ising model , which for example characterizes a continuous demixing transition of fluid binary mixtures . in ref . @xcite we used the e... | we perform monte carlo simulations of the improved blume - capel model on the simple cubic lattice . in particular , we employ the exchange or geometric cluster cluster algorithm [ j.r . e * 57 * , 4976 ( 1998 ) ] . in a previous work we demonstrated that this algorithm allows to compute the thermodynamic casimir force... | we study the thermodynamic casimir force for films with various types of boundary conditions and the bulk universality class of the three - dimensional ising model . to this end we perform monte carlo simulations of the improved blume - capel model on the simple cubic lattice . in particular , we employ the exchange or... |
cond-mat0505316 | i | the experimental realization @xcite of bose - einstein condensation in confined gases of atoms at low temperatures has been the stimulus for a wide range of experimental and theoretical investigations . ( see ref . @xcite for a review . ) by ingenious experimental techniques it is possible to prepare the atoms as eith... | we study the thermodynamic properties of an ideal gas of fermions in a harmonic oscillator confining potential . step - like behaviour in the chemical potential , first noted in numerical studies , is obtained analytically and shown to result in an oscillatory behaviour of the specific heat when the particle number is ... | we study the thermodynamic properties of an ideal gas of fermions in a harmonic oscillator confining potential . the analogy between this problem and the de haas - van alphen effect is discussed and used to obtain analytical results for the chemical potential and specific heat in the case of both isotropic and anisot... |
astro-ph0602191 | i | ngc 4051 is a nearby ( z=0.0023 ) low luminosity narrow line seyfert 1 ( nls1 ) galaxy which exhibits extreme x ray variability in flux and spectral shape on both long and short timescales . the source sometimes enters relatively long and unusual low flux states in which the hard spectrum becomes very flat ( @xmath... | these problems can be solved in terms of the two component model in which the soft excess is not thermal , but due to the ionized reflection component . in this context , the power law has constant slope ( about 2.2 ) and the slope flux correlation is explained in terms of the relative contribution of the power law a... | we study the x ray spectral variability of the narrow line seyfert 1 galaxy ngc 4051 as observed during two _ xmm newton _ observations . to gain insight on the general behaviour , we first apply model independent techniques such as rms spectra and flux - flux plots . we then perform time resolved spectral analys... |
astro-ph0602191 | c | we investigated the x ray spectral variability of the narrow line seyfert 1 galaxy with model independent techniques ( rms spectra and flux flux plots ) and with time resolved spectral variability . the main features of the x ray emission of are here summarized . 1 . the data of show evidence for a distant... | we study the x ray spectral variability of the narrow line seyfert 1 galaxy ngc 4051 as observed during two _ xmm newton _ observations . to gain insight on the general behaviour independent techniques such as rms spectra and flux - flux plots . the nuclear emission can be modelled both in terms of a `` standard mo... | we study the x ray spectral variability of the narrow line seyfert 1 galaxy ngc 4051 as observed during two _ xmm newton _ observations . to gain insight on the general behaviour , we first apply model independent techniques such as rms spectra and flux - flux plots . we then perform time resolved spectral analys... |
1703.08008 | i | the search for the qcd critical point is one of the most intriguing topics in the physics of qcd in medium . the existence of the critical point(s ) in the qcd phase diagram in the temperature ( @xmath0 ) and baryon chemical potential ( @xmath1 ) plane is suggested by effective models @xcite and lattice qcd monte carlo... | we study time evolution of critical fluctuations of conserved charges near the qcd critical point in the context of relativistic heavy ion collisions . a stochastic diffusion equation is employed in order to describe the diffusion property of the critical fluctuation arising from the coupling of the order parameter fie... | we study time evolution of critical fluctuations of conserved charges near the qcd critical point in the context of relativistic heavy ion collisions . a stochastic diffusion equation is employed in order to describe the diffusion property of the critical fluctuation arising from the coupling of the order parameter fie... |
1112.2443 | i | turbulence is one of the most important topics in modern physics . turbulence in classical fluids has been studied for a long time @xcite , but turbulence is also observed in diverse fields such as low - temperature physics , plasma physics , and astronomy , @xmath0 . kolmogorov studied turbulence in classical fluids i... | we theoretically study counterflow instability and turbulence in a spin-1 spinor bose einstein condensate by the gross pitaevskii equation and the bogoliubov de gennes equation . our study considers ( i ) the dynamics induced by the counterflow of two components with different magnetic quantum numbers , which leads ... | we theoretically study counterflow instability and turbulence in a spin-1 spinor bose einstein condensate by the gross pitaevskii equation and the bogoliubov de gennes equation . our study considers ( i ) the dynamics induced by the counterflow of two components with different magnetic quantum numbers , which leads ... |
1206.2003 | r | in the following we use the boltzmann equation approach outlined in section [ sec : ii ] to study the temperature and density dependence of the acoustic phonon limited mobility in 2d mos@xmath1 for temperatures @xmath168 k and high carrier densities @xmath169 to @xmath170 @xmath10 . the mobility limited by scatterin... | we theoretically study the acoustic phonon limited mobility in-doped two - dimensional mos for temperatures k and high carrier densities using the boltzmann equation and first - principles calculations of the acoustic electron - phonon ( el - ph ) interaction . in combination with a continuum elastic model , analytic ... | we theoretically study the acoustic phonon limited mobility in-doped two - dimensional mos for temperatures k and high carrier densities using the boltzmann equation and first - principles calculations of the acoustic electron - phonon ( el - ph ) interaction . in combination with a continuum elastic model , analytic ... |
1206.2003 | c | in this work we have combined analytic and first - principles calculations of the el - ph interaction with an semianalytic solution of the boltzmann equation to study the temperature and density dependence of the acoustic phonon limited mobility in 2d @xmath0-type mos@xmath1 . the acoustic deformation potentials for th... | we furthermore show that the deformation potential interaction has contributions from both normal and umklapp processes and that the latter contribution is only weakly affected by carrier screening . intrinsic mobilities in excess of v s are predicted at k and high carrier densities ( ) . at k , the mobility does... | we theoretically study the acoustic phonon limited mobility in-doped two - dimensional mos for temperatures k and high carrier densities using the boltzmann equation and first - principles calculations of the acoustic electron - phonon ( el - ph ) interaction . in combination with a continuum elastic model , analytic ... |
1112.4470 | i | one of the most debated issues in gamma ray bursts ( grbs ) concerns the existence of correlations among the spectral parameters of the prompt emission and its energetic and luminosity . three robust correlations have been identified . each of them involves the rest frame peak energy @xmath0 of the @xmath5 prompt spec... | we use a nearly complete sample of gamma ray bursts ( grbs ) detected by the _ swift _ satellite to study the correlations between the spectral peak energy of the prompt emission , the isotropic energetics and the isotropic luminosity . this grb sample is characterized by a high level of completeness in redshift ( 90... | we use a nearly complete sample of gamma ray bursts ( grbs ) detected by the _ swift _ satellite to study the correlations between the spectral peak energy of the prompt emission , the isotropic energetics and the isotropic luminosity . this grb sample is characterized by a high level of completeness in redshift ( 90... |
astro-ph0410127 | i | in this paper , we present a sample of local analogues to the intermediate- and high-@xmath8 lcbgs . we selected our sample from only those kiss galaxies that are actively forming stars . due to resolution effects , we limit our sample to only those galaxies within 185 mpc of the milky way . the sample of lcbgs is defi... | we use the kpno international spectroscopic survey ( kiss ) for emission - line galaxies to identify and describe a sample of local analogues to the luminous compact blue galaxies ( lcbgs ) that are observed to be abundant at intermediate and high redshift . this result differs from the results of previous studies that... | we use the kpno international spectroscopic survey ( kiss ) for emission - line galaxies to identify and describe a sample of local analogues to the luminous compact blue galaxies ( lcbgs ) that are observed to be abundant at intermediate and high redshift . the sample is selected using criteria believed effective at i... |
hep-th0105211 | i | there has long been an interest in the magnetic monopoles that arise as classical solutions in certain spontaneously broken gauge theories . when the theory is quantized , these give rise to magnetically charged particles that can be regarded as the counterparts of the electrically charged elementary quanta of the theo... | we focus on configurations containing two massive and massless monopoles . we also discuss the corresponding behavior for the case of the su(3 ) multimonopole solutions studied by dancer . epsf + + + + + + | we use the moduli space approximation to study the time evolution of magnetically charged configurations in a theory with an su( ) gauge symmetry spontaneously broken to u(1)su()u(1 ) . we focus on configurations containing two massive and massless monopoles . the latter do not appear as distinct objects , but instead ... |
hep-th0105211 | c | in this paper we have studied the properties of the magnetically charged counterparts of the electrically - charged massless particles that arise when a gauge theory is spontaneously broken to a non - abelian subgroup . previous studies of static bps solutions have shown that these massless monopoles coalesce into a cl... | we use the moduli space approximation to study the time evolution of magnetically charged configurations in a theory with an su( ) gauge symmetry spontaneously broken to u(1)su()u(1 ) . the latter do not appear as distinct objects , but instead coalesce into a cloud of non - abelian field . we find that at large times ... | we use the moduli space approximation to study the time evolution of magnetically charged configurations in a theory with an su( ) gauge symmetry spontaneously broken to u(1)su()u(1 ) . we focus on configurations containing two massive and massless monopoles . the latter do not appear as distinct objects , but instead ... |
1204.5428 | i | self - consistent models of spherical and disklike stellar systems are relatively simple to build using standard textbook methods @xcite , but special techniques are necessary to obtain triaxial models adequate to represent elliptical galaxies . one of the most popular of those techniques is due to @xcite : one chooses... | we used the n body code of to build a dozen cuspy ( ) triaxial models of stellar systems through dissipationless collapses of initially spherical distributions of particles . the changes of those values were all less than 3 per cent over one hubble time and , moreover , we show that the most likely cause of those chan... | we used the n body code of to build a dozen cuspy ( ) triaxial models of stellar systems through dissipationless collapses of initially spherical distributions of particles . we chose four sets of initial conditions that resulted in models morphologically resembling e2 , e3 , e4 and e5 galaxies , respectively . within... |
1204.5428 | r | we used the results of the @xmath15 @xmath10 long final evolution to check the stability of the central density and the semiaxes of the stellar systems . for this purpose , we computed at @xmath14 @xmath10 intervals the central density from the @xmath6 particles closer to the centre of each system , and the moments of ... | we checked the stability of our models using the values of their central densities and of their moments of inertia , which turned out to be very constant indeed . we computed the six lyapunov exponents of nearly 5,000 orbits in each model in order to recognize regular , partially and fully chaotic orbits . all the mode... | we used the n body code of to build a dozen cuspy ( ) triaxial models of stellar systems through dissipationless collapses of initially spherical distributions of particles . we chose four sets of initial conditions that resulted in models morphologically resembling e2 , e3 , e4 and e5 galaxies , respectively . within... |
1611.04196 | i | calibration is ubiquitous in all fields of science and engineering . it is an essential step to guarantee that the devices measure accurately what scientists and engineers want . if sensor devices are not properly calibrated , their measurements are likely of little use to the application . while calibration is mostly ... | , it can be quite difficult , expensive and sometimes even impossible to implement . we study a challenging problem called _ self - calibration _ , i.e. , the task of designing an algorithm for devices so that the algorithm is able to perform calibration automatically . the proposed algorithms are numerically extremely... | whenever we use devices to take measurements , calibration is indispensable . while the purpose of calibration is to reduce bias and uncertainty in the measurements , it can be quite difficult , expensive and sometimes even impossible to implement . we study a challenging problem called _ self - calibration _ , i.e. , ... |
1210.4654 | i | the evaluation of the total causal effect of a given point exposure , treatment or intervention on an outcome of interest is arguably the most common objective of experimental and observational studies in the fields of epidemiology , biostatistics and in the social sciences . however , in recent years , investigators i... | while estimation of the marginal ( total ) causal effect of a point exposure on an outcome is arguably the most common objective of experimental and observational studies in the health and social sciences , in recent years , investigators have also become increasingly interested in mediation analysis . specifically , u... | while estimation of the marginal ( total ) causal effect of a point exposure on an outcome is arguably the most common objective of experimental and observational studies in the health and social sciences , in recent years , investigators have also become increasingly interested in mediation analysis . specifically , u... |
1703.07040 | r | the electronic structure of a material is very sensitive to the change in crystal structure as the hybridization of various electronic states depends on the bond length , distortion in the lattice structure ( leading to a change in bond angle ) etc . often it is found that covalency induces key interactions leading to ... | * cafeas exhibits collapsed tetragonal ( ct ) structure and varied exotic behavior under pressure at low temperatures that led to debate on linking the structural changes to its exceptional electronic properties like superconductivity , magnetism , etc . here , we investigate the electronic structure of cafeas forming ... | * cafeas exhibits collapsed tetragonal ( ct ) structure and varied exotic behavior under pressure at low temperatures that led to debate on linking the structural changes to its exceptional electronic properties like superconductivity , magnetism , etc . here , we investigate the electronic structure of cafeas forming ... |
1703.07040 | c | in summary , we present here the detailed electronic structure of cafe@xmath0as@xmath0 for different crystallographic structures using density functional theory . the calculated density of states indicate strong covalency induced effect in the electronic structure , which increases with the compression of @xmath5 axis ... | consequently , the nesting between the hole and electron fermi surfaces associated to the spin density wave state disappears indicating a pathway to achieve the proximity to quantum fluctuations . notably , the hybridization of ca 4 states ( ca - layer may be treated as a charge reservoir layer akin to those in cuprate... | * cafeas exhibits collapsed tetragonal ( ct ) structure and varied exotic behavior under pressure at low temperatures that led to debate on linking the structural changes to its exceptional electronic properties like superconductivity , magnetism , etc . here , we investigate the electronic structure of cafeas forming ... |
1304.2017 | i | optoacoustic tomography ( oat ) , also known as photoacoustic computed tomography , is an emerging imaging modality that has great potential for a wide range of biomedical imaging applications @xcite . in oat , a short laser pulse is employed to irradiate biological tissues . when the biological tissues absorb the opti... | * purpose : * optoacoustic tomography ( oat ) is inherently a three - dimensional ( 3d ) inverse problem . however , most studies of oat image reconstruction still employ two - dimensional ( 2d ) imaging models . one important reason is because 3d image reconstruction is computationally burdensome . the aim of this wor... | * purpose : * optoacoustic tomography ( oat ) is inherently a three - dimensional ( 3d ) inverse problem . however , most studies of oat image reconstruction still employ two - dimensional ( 2d ) imaging models . one important reason is because 3d image reconstruction is computationally burdensome . the aim of this wor... |
1304.2017 | r | the computational efficiency and accuracy of the proposed gpu - based implementations of the fbp algorithm and projection / backprojection operators for use with iterative image reconstruction algorithms were quantified in computer simulation and experimental oat imaging studies . _ numerical phantom : _ the numerical ... | computer - simulation and experimental studies are conducted to investigate the computational efficiency and numerical accuracy of the developed algorithms . accurate images are reconstructed by use of the fbp and iterative image reconstruction algorithms from both computer - simulated and experimental data . the... | * purpose : * optoacoustic tomography ( oat ) is inherently a three - dimensional ( 3d ) inverse problem . however , most studies of oat image reconstruction still employ two - dimensional ( 2d ) imaging models . one important reason is because 3d image reconstruction is computationally burdensome . the aim of this wor... |
0709.1029 | i | recapping the findings presented herein : for many interesting choices of the basic input parameters of the mssm , heavier higgs boson decay modes of the type @xmath270 , with @xmath271 are potentially important lhc signal modes . the neutralinos subsequent leptonic decays , typified by @xmath272 , can yield a fou... | -0.05 cm heavy neutral higgs boson production and decay into neutralino and chargino pairs is studied at the large hadron collider in the context of the minimal supersymmetric standard model . higgs boson decays into the heavier neutralino and chargino states , _ in particular , bosons with quite heavy masses , approac... | -0.05 cm heavy neutral higgs boson production and decay into neutralino and chargino pairs is studied at the large hadron collider in the context of the minimal supersymmetric standard model . higgs boson decays into the heavier neutralino and chargino states , _ i.e. _ , as well as ( all leading to four - lepton plus ... |
1302.5188 | i | let @xmath9 be a compact surface with @xmath10 not a 4-punctured sphere . harvey @xcite defined the curve complex @xmath11 as follows : the vertices of @xmath11 are the isotopy classes of essential simple closed curves on @xmath9 , and @xmath12 distinct vertices @xmath13 determine a k - simplex of @xmath11 if and only ... | \(1 ) for any integers and , there is a closed 3-manifold which admits a distance heegaard splitting of genus except that the pair of is . furthermore , can be chosen to be hyperbolic except that the pair of is . . [ section ] [ thm]lemma [ thm]corollary [ thm]proposition [ thm]example [ section ] [ section ] ... | \(1 ) for any integers and , there is a closed 3-manifold which admits a distance heegaard splitting of genus except that the pair of is . furthermore , can be chosen to be hyperbolic except that the pair of is . ( 2 ) for any integers and , there are infinitely many non - homeomorphic closed 3-manifolds admitting dist... |
1610.00853 | i | strictly chordality @xmath0 graphs ( @xmath1 graphs ) are graphs which are either cycle - free or every induced cycle is of length @xmath0 . this graph class was introduced very recently by dhanalakshmi et al . in @xcite by generalizing chordal and chordal bipartite graphs in a larger dimension . @xmath5 and @xmath6 gr... | _ strictly chordality- graphs ( ) _ are graphs which are either cycle - free or every induced cycle is of length exactly . strictly chordality-3 and strictly chordality-4 graphs are well known chordal and chordal bipartite graphs , respectively . for , the study has been recently initiated in and various structural and... | _ strictly chordality- graphs ( ) _ are graphs which are either cycle - free or every induced cycle is of length exactly . strictly chordality-3 and strictly chordality-4 graphs are well known chordal and chordal bipartite graphs , respectively . for , the study has been recently initiated in and various structural and... |
1603.02962 | c | out of the many @xmath1 values that can be found in any given burst , the question of which @xmath1 can represent the burst to the extent that it can be an accurate cosmological indicator has at least two robust answers : both the time - averaged and peak flux - derived values , due to their correlation . the details... | distributions of have been compiled for time - resolved spectra from bright grbs , and also time - averaged spectra and peak flux spectra for nearly every burst observed by cgro - batse and fermi - gbm . even when determined by an instrument with a broad energy band , such as gbm ( 8 kev to 40 mev ) , the distribution... | a characteristic energy of individual gamma - ray burst ( grb ) spectra can in most cases be determined from the peak energy of the energy density spectra ( ) , called ` ' . distributions of have been compiled for time - resolved spectra from bright grbs , and also time - averaged spectra and peak flux spectra for nea... |
1107.5901 | i | the first celestial radio source detected the sun was discovered as a consequence of its variability @xcite . nonetheless , while variability has continued to be a source of discovery and insight in the radio regime , few dedicated searches for variables and transients have been undertaken , primarily because the obs... | a comprehensive search for variable and transient radio sources has been conducted using 55,000 snapshot images of the _ first _ survey . we present an analysis leading to the discovery of 1,627 variable and transient objects down to mjy levels over a wide range of timescales ( few minutes to years ) . interestingly ,... | a comprehensive search for variable and transient radio sources has been conducted using 55,000 snapshot images of the _ first _ survey . we present an analysis leading to the discovery of 1,627 variable and transient objects down to mjy levels over a wide range of timescales ( few minutes to years ) . variations obse... |
1605.02352 | i | in the probabilistic analysis of algorithms the complexity of fundamental algorithms is studied under models of random input . this allows to describe the typical behavior of an algorithm and is often more meaningful than the worst case complexity classically considered in computer science . in this paper we study the ... | a fundamental algorithm for selecting ranks from a finite subset of an ordered set is radix selection . this algorithm requires the data to be given as strings of symbols over an ordered alphabet , e.g. , binary expansions of real numbers . its complexity is measured by the number of symbols that have to be read . in t... | a fundamental algorithm for selecting ranks from a finite subset of an ordered set is radix selection . this algorithm requires the data to be given as strings of symbols over an ordered alphabet , e.g. , binary expansions of real numbers . its complexity is measured by the number of symbols that have to be read . in t... |
1703.00211 | i | the assumption that the turbulent stress is proportional to pressure in accretion disks ( the @xmath0-model ) is a fundamental ingredient of classic accretion disk theory ( shakura & sunyaev 1973 ) . it has been partially justified by successful application to quasi - steady systems , such as the thermal spectrum of dw... | a long - standing puzzle in the study of black - hole accretion concerns the presence or not of thermal instability . classical theory predicts the encircling accretion disk is unstable , as do self - consistent mhd simulations of the flow . yet observations of strongly accreting sources generally fail to exhibit cycli... | a long - standing puzzle in the study of black - hole accretion concerns the presence or not of thermal instability . classical theory predicts the encircling accretion disk is unstable , as do self - consistent mhd simulations of the flow . yet observations of strongly accreting sources generally fail to exhibit cycli... |
cond-mat0101459 | i | we have developed a microscopic theory for the generation and propagation of coherent la phonons in pseudomorphically strained wurzite ( 0001 ) @xmath0 multi - quantum well ( mqw ) @xmath1 diodes . both @xmath9 and @xmath88 have different lattice constants so that a significant mismatch occurs between the wells and bar... | a microscopic theory for the generation and propagation of coherent la phonons in pseudomorphically strained wurtzite ( 0001 ) multi - quantum well ( mqw ) diodes is presented . the generation of coherent la phonons is driven by photoexcitation of electron - hole pairs by an ultrafast gaussian pump laser and is treated... | a microscopic theory for the generation and propagation of coherent la phonons in pseudomorphically strained wurtzite ( 0001 ) multi - quantum well ( mqw ) diodes is presented . the generation of coherent la phonons is driven by photoexcitation of electron - hole pairs by an ultrafast gaussian pump laser and is treated... |
1002.4480 | i | cosmic objects emit in diverse electromagnetic wavelengths from radio to @xmath0-rays . some of them ( e.g. , stars ) are luminous primarily in a narrow wavelength range , while others ( e.g. , active galactic nuclei ) emit in a broad energy spectrum . it is , therefore , essential to observe a celestial source in vari... | such a source was first discovered in x - rays in 1962 , and this discovery formally gave birth to the x - ray astronomy " . in the subsequent decades , our knowledge of these sources has increased enormously by the observations with several x - ray space missions . here we give a brief overview of our current underst... | a neutron star low - mass x - ray binary is a binary stellar system with a neutron star and a low - mass companion star rotating around each other . in this system the neutron star accretes mass from the companion , and as this matter falls into the deep potential well of the neutron star , the gravitational potential ... |
physics9811047 | i | collision broadened spectral line shapes carry important information on the time - dependent dynamical and collisional processes occurring in a radiating medium . for a system consisting of radiators ( light emitting or absorbing species ) and perturbers ( atoms , molecules , ions or electrons ) , the basic ingredient... | broadened line shape theory is the time dependent dipole autocorrelation function of the radiator - perturber system . a modified form of the wigner weyl isomorphism between quantum operators and phase space functions ( weyl symbols ) is introduced in order to describe the quantum structure of this system . this modif... | a new and computationally viable full quantum version of line shape theory is obtained in terms of a mixed weyl symbol calculus . the basic ingredient in the collision broadened line shape theory is the time dependent dipole autocorrelation function of the radiator - perturber system . the observed spectral intensity ... |
physics9811047 | c | the spectral profile of the intensity of an emission or absorption line is the fourier transform of the dipole autocorrelation function @xmath15 . in this paper we have introduced a mixed weyl symbol formalism to represent the dynamics needed to construct the single perturber @xmath18 . within this approach , the radia... | a new and computationally viable full quantum version of line shape theory is obtained in terms of a mixed weyl symbol calculus . the basic ingredient in the collision the observed spectral intensity is the fourier transform of this correlation function . the higher order corrections arise from the noncommutative natu... | a new and computationally viable full quantum version of line shape theory is obtained in terms of a mixed weyl symbol calculus . the basic ingredient in the collision broadened line shape theory is the time dependent dipole autocorrelation function of the radiator - perturber system . the observed spectral intensity ... |
1411.0217 | i | in the recent years , the performance of photovoltaic ( pv ) cells has been significantly improved by using multi - cell devices . in such systems , few different cells are combined to maximize the conversion efficiency by dividing the spectrum of solar radiation and then use a proper cell for each divided spectrum . u... | more precisely , instead of using single solutions as nests for the cs , we use the concept of a simplex which is used in the nelder - mead algorithm . although the underlying problem consists of the minimization of a function of a relatively small number of parameters , the difficulty comes from the fact that the eval... | a new hybridization of the cuckoo search ( cs ) is developed and applied to optimize multi - cell solar systems ; namely multi - junction and split spectrum cells . the new approach consists of combining the cs with the nelder - mead method . more precisely , instead of using single solutions as nests for the cs , we u... |
1411.0217 | r | in this section , we present results of using the new method to optimize two sets of problems . the first test are conducted on standard benchmark test functions and compared to previously published results @xcite . more precisely , we have compared our method to the hybridizations of nms with pso and nms with ga on pr... | a new hybridization of the cuckoo search ( cs ) is developed and applied to optimize multi - cell solar systems ; namely multi - junction and split spectrum cells . , the hybridized algorithm becomes more robust and less sensitive to parameter tuning which exists in cs . the goal of our work was to optimize the perform... | a new hybridization of the cuckoo search ( cs ) is developed and applied to optimize multi - cell solar systems ; namely multi - junction and split spectrum cells . the new approach consists of combining the cs with the nelder - mead method . more precisely , instead of using single solutions as nests for the cs , we u... |
0904.3223 | c | a strategy was proposed for the rapid development of molecular models for engineering applications . the strategy relies on results from qm _ ab initio _ calculations to include physically sound molecular properties and to reduce the number of adjustable parameters . dispersive and repulsive interactions were modeled b... | the electrostatic interactions are modeled by reducing the electron density distribution to point dipoles and point quadrupoles located in the center of mass of the molecules . dispersive and repulsive interactions are described by lennard - jones sites , for which the parameters are iteratively optimized to experiment... | a parameterization strategy for molecular models on the basis of force fields is proposed , which allows a rapid development of models for small molecules by using results from quantum mechanical ( qm ) _ ab initio _ calculations and thermodynamic data . the geometry of the molecular models is specified according to th... |
1201.0310 | i | a pattern of a given @xmath0 matrix is defined to be a subset of @xmath1 , i.e. , a set of positions in the matrix in which the entries are present . a ( symmetric ) partial matrix specified by a pattern is an @xmath0 symmetric matrix in which the entries corresponding to the positions listed in the pattern are specifi... | a positive definite completion problem pertains to determining whether the unspecified positions of a partial ( or incomplete ) matrix can be completed in a desired subclass of positive definite matrices . in this paper we study an important and new class of positive definite completion problems where the desired subcl... | a positive definite completion problem pertains to determining whether the unspecified positions of a partial ( or incomplete ) matrix can be completed in a desired subclass of positive definite matrices . in this paper we study an important and new class of positive definite completion problems where the desired subcl... |
1011.2878 | i | we consider the incompressible navier stokes equations @xmath0 in a bounded domain @xmath1 ( @xmath2 ) with a smooth boundary subject to homogeneous dirichlet boundary conditions @xmath3 on @xmath4 . in ( [ onetwo ] ) , @xmath5 is the velocity field , @xmath6 the pressure , and @xmath7 a given force field . for sim... | a posteriori estimates for mixed finite element discretizations of the navier - stokes equations are derived . any available procedure to estimate the error in a stokes problem can be used to estimate the error in the nonlinear evolutionary problem . a practical procedure to estimate the error based on the so - called ... | a posteriori estimates for mixed finite element discretizations of the navier - stokes equations are derived . we show that the task of estimating the error in the evolutionary navier - stokes equations can be reduced to the estimation of the error in a steady stokes problem . as a consequence , any available procedure... |
nlin0301026 | i | the chaotic dynamics of ray trajectories in ocean acoustics have been explored in a number of recent publications ( @xcite-@xcite ) , including two recent reviews @xcite . in these publications a variety of theoretical results are presented and illustrated , mostly using idealized models of the ocean sound channel . i... | a ray - based wavefield description is employed in the interpretation of measurements made during the november 1994 acoustic engineering test ( the aet experiment ) . in this experiment phase - coded pulse - like signals with 75 hz center frequency and 37.5 hz bandwidth were transmitted near the sound channel axis in t... | a ray - based wavefield description is employed in the interpretation of measurements made during the november 1994 acoustic engineering test ( the aet experiment ) . in this experiment phase - coded pulse - like signals with 75 hz center frequency and 37.5 hz bandwidth were transmitted near the sound channel axis in t... |
astro-ph0307351 | r | in table 3 , columns 2 and 3 , we give the positions of the central stars of the nebulae from the continuum images , where observed . alternately , we give the geometric center positions of the pns . columns ( 4 ) and ( 5 ) of table 3 give the photometric radii of the nebulae , measured as described in @xcite , and the... | the morphologies of smc pns are similar to those of lmc and galactic pns . however , only a third of the resolved smc pns are asymmetric , compared to half in the lmc . the low metallicity environment of the smc seems to discourage the onset of bipolarity in pns . we show that the surface brightness to radius relations... | a sample of 27 planetary nebulae ( pns ) in the small magellanic clouds ( smc ) have been observed with the hubble space telescope imaging spectrograph ( _ hst_/stis ) to determine their morphology , size , and the spatial variation of the ratios of bright emission lines . the morphologies of smc pns are similar to tho... |
1212.5104 | i | there has been a high - level of research and device interests on both the electronic and optical properties of two - dimensional ( 2d ) graphene material@xcite since the report on the first successful isolation of single graphene layers as well as the related transport and raman experiments performed for such layers@x... | a self - consistent theory involving maxwell equations and a density - matrix linear - response theory is solved for an electromagnetically - coupled doped graphene micro - ribbon array and a quantum - well electron gas sitting at an interface between a half - space of air and another half - space of a doped semiconduc... | a self - consistent theory involving maxwell equations and a density - matrix linear - response theory is solved for an electromagnetically - coupled doped graphene micro - ribbon array and a quantum - well electron gas sitting at an interface between a half - space of air and another half - space of a doped semiconduc... |
0801.0564 | i | let @xmath1 be a surface of genus @xmath2 . we can express @xmath1 as the boundary @xmath3 of a 3-dimensional handlebody @xmath4 by choosing @xmath0 disjoint , embedded circles , @xmath5 , linearly independent in homology : each of these is filled so as to bound a disc in @xmath4 . conversely , the handlebody @xmath4 d... | a-tuple of disjoint , linearly independent circles in a riemann surface of genus determines a ` heegaard torus ' in its-fold symmetric product . it is proved that , for symplectic forms with certain properties , these two tori are hamiltonian - isotopic lagrangian submanifolds . this provides an alternative route to th... | a-tuple of disjoint , linearly independent circles in a riemann surface of genus determines a ` heegaard torus ' in its-fold symmetric product . changing the circles by a handleslide produces a new torus . it is proved that , for symplectic forms with certain properties , these two tori are hamiltonian - isotopic lagra... |
1602.04598 | i | the bondi solution of accretion on a point mass ( bondi 1952 ) , due to its inherent simplicity , is a standard tool for the interpretation of observations of the accretion phenomenon , and the starting point for the development of recipes for the mass accretion rate , to be adopted for example in semi - analytical mod... | accretion onto central massive black holes in galaxies is often modelled with the bondi solution . in this paper we provide a general analysis of the bias in the estimates of the bondi radius and mass accretion rate , when adopting as fiducial values for the density and temperature at infinity the values of these quant... | accretion onto central massive black holes in galaxies is often modelled with the bondi solution . in this paper we study a generalization of the classical bondi accretion theory , considering the additional effects of the gravitational potential of the host galaxy , and of electron scattering in the optically thin lim... |
1602.04598 | i | due to its simplicity , the classical bondi accretion theory remains the standard paradigm against which more realistic descriptions are confronted , and observations are interpreted . also , bondi accretion is adopted to get a simple approximation for the mass accretion rate in semi - analytical models and numerical s... | we study a generalization of the classical bondi accretion theory , considering the additional effects of the gravitational potential of the host galaxy , and of electron scattering in the optically thin limit . we also give general formulae to compute the correction terms of the critical accretion parameter in relevan... | accretion onto central massive black holes in galaxies is often modelled with the bondi solution . in this paper we study a generalization of the classical bondi accretion theory , considering the additional effects of the gravitational potential of the host galaxy , and of electron scattering in the optically thin lim... |
1701.08647 | i | the agn unification theory @xcite has been subject to many successes and , also , some controversies . in its simplest form only the viewing angle towards the torus matters . this basic picture has long been challenged by statistical tests @xcite . many statistical tests are often overlooked due to anisotropic sample s... | it was believed that a type-2 agn is a type-1 agn viewed through a dusty kiloparsec - size torus , but an emerging body of observations suggests more than just the viewing angle matters . here we report significant differences in supernova counts and classes in the first study to date of supernovae near type-1 and type... | active galactic nuclei ( agn ) are extremely powerful cosmic objects , driven by accretion of hot gas upon super - massive black holes . the zoo of agn classes are divided into two major groups , with type-1 agn displaying broad balmer emission lines and type-2 narrow ones . for a long time it was believed that a type-... |
1701.08647 | c | using sne from the iptf and galaxies from the sdss , we have searched for possible physical differences between type-1 and type-2 agn . simultaneously , we have also carefully matched type-1 and type-2 agn host galaxies to gain information on the agn engine . we find that : 1 . the two agn classes differ in term of ... | in addition , type-1 and type-2 agn that are dominated by star formation according to wise colours and are matched in 22 m absolute magnitude differ by a factor of ten in[oiii] luminosity , suggesting that when residing in similar type of host galaxies type-1 agn are much more luminous . our results demonstrate two mor... | active galactic nuclei ( agn ) are extremely powerful cosmic objects , driven by accretion of hot gas upon super - massive black holes . the zoo of agn classes are divided into two major groups , with type-1 agn displaying broad balmer emission lines and type-2 narrow ones . for a long time it was believed that a type-... |
astro-ph0404562 | i | carruba _ et al . _ ( 2002 ) studied an analytical model of the kozai resonance ( kozai 1962 ) based on a secular development of the disturbing function , expanded in series of @xmath10 ( where the @xmath11 stands hereafter for quantities related to the perturber ) , truncated at second order in @xmath10 , and averaged... | the argument of pericenter of a satellite usually precesses from 0 to . because the great - inequality s period is connected to the semimajor axes of jupiter and saturn , and because the positions of the jovian planets have likely changed since their formation ( malhotra 1995 ) , the phase - space location of these sec... | among the many new irregular satellites that have been discovered in the last five years , at least six are in the so - called kozai resonance . due to solar perturbations , the argument of pericenter of a satellite usually precesses from 0 to . however , at inclinations higher than and lower than a new kind of behavio... |
astro-ph0404562 | i | we have analyzed the orbital behavior of satellites inside and outside the kozai resonance for the phase space around the saturnian satellite kiviuq . our goal was to identify areas of chaotic behavior and to understand if chaotic diffusion might have played an important role , now or in the past , for orbital stabilit... | this is important because chaotic diffusion may transfer orbits from libration to circulation , and vice versa . to identify chaotic orbits we used two we show that a mechanism of sweeping secondary resonances , similar to the one studied by ferraz - mello _ et al . _ ( 1998 ) for the asteroids in the 2:1 mean motion r... | among the many new irregular satellites that have been discovered in the last five years , at least six are in the so - called kozai resonance . due to solar perturbations , the argument of pericenter of a satellite usually precesses from 0 to . however , at inclinations higher than and lower than a new kind of behavio... |
1408.6145 | r | for quantitative experimental measurements a controlled setup with an oriented beam of quasiparticles and a well - known distribution of vortices is required . in the experiment of fig . [ andreevdemo ] , for instance , the usual assumption is that the vortex tangle is homogeneous and isotropic in all directions @xcite... | the andreev signal is also used to analyze the spin down of the superfluid component after a sudden impulsive stop of rotation from an equilibrium vortex state . in a measuring setup where the rotating cylinder has a rough bottom surface , annihilation of the vortices proceeds via a leading rapid turbulent burst follow... | andreev reflection of quasiparticle excitations from quantized line vortices is reviewed in the isotropic b phase of superfluidhe in the temperature regime of ballistic quasiparticle transport at . the reflection from an array of rectilinear vortices in solid - body rotation is measured with a quasiparticle beam illumi... |
1412.4716 | i | anisotropy in the arrival direction distribution of ultrahigh - energy ( uhe ) cosmic rays ( crs ) provides valuable information for understanding the origin of uhecrs , whose sources remain uncertain . the marginal anisotropy reported by the pierre auger observatory ( pao ) in the highest energy range ( @xmath6 ev ; *... | anisotropy in the arrival direction distribution of ultrahigh - energy cosmic rays ( uhecrs ) produced by powerful sources is numerically evaluated . our anisotropy calculations are applied for extreme high - frequency - peaked bl lac objects 1es 0229 + 200 , 1es 1101 - 232 , and 1es 0347 - 121 , to test the uhecr - in... | anisotropy in the arrival direction distribution of ultrahigh - energy cosmic rays ( uhecrs ) produced by powerful sources is numerically evaluated . we show that , taking account of the galactic magnetic field , nondetection of significant anisotropy at ev at present and in future experiments imposes general upper lim... |
1412.4716 | i | by means of numerical simulations , we have studied anisotropy in the arrival direction distribution of @xmath227 ev crs arriving from steady powerful cr sources . the strong isotropy at @xmath5 ev imposes upper bounds on the cr luminosity of a steady powerful uhecr source , depending on the source redshift and egmf . ... | the upper limits constrain the existence of typical steady sources in the local universe and limit the local density of ev uhecr sources to be mpc assuming average intergalactic magnetic fields less than g. this isotropy , which is stronger than measured at the highest energies , may indicate the transient generation o... | anisotropy in the arrival direction distribution of ultrahigh - energy cosmic rays ( uhecrs ) produced by powerful sources is numerically evaluated . we show that , taking account of the galactic magnetic field , nondetection of significant anisotropy at ev at present and in future experiments imposes general upper lim... |
1605.07934 | i | heavy quark pair and dijet production in electron - proton collisions offer direct probes of the gluons inside the proton . they allow to map out detailed information about the momentum distribution of the gluons , including the transverse momentum dependence @xcite . this is of particular interest in the case of tran... | asymmetries in heavy quark pair and dijet production in electron - proton collisions allow studies of gluon tmds in close analogy to studies of quark tmds in semi - inclusive dis . here we present expressions for azimuthal asymmetries for both unpolarized and transversely polarized proton cases and consider the maximal... | asymmetries in heavy quark pair and dijet production in electron - proton collisions allow studies of gluon tmds in close analogy to studies of quark tmds in semi - inclusive dis . here we present expressions for azimuthal asymmetries for both unpolarized and transversely polarized proton cases and consider the maximal... |
1605.07934 | c | we have studied the azimuthal asymmetries in heavy quark pair and dijet production in dis process , which provide direct access to the ww - type gluon tmds . we found that in these processes the gluon tmds arise in the same way as the quark tmds do in semi - inclusive dis . the measurements of these azimuthal asymmetri... | the latter are found to be rather sizeable , except in certain kinematic limits which are pointed out . in addition , we consider the small- limit and expectations from a mclerran - venugopalan model for unpolarized and linearly polarized gluons and from a perturbative , large transverse momentum calculation for the t ... | asymmetries in heavy quark pair and dijet production in electron - proton collisions allow studies of gluon tmds in close analogy to studies of quark tmds in semi - inclusive dis . here we present expressions for azimuthal asymmetries for both unpolarized and transversely polarized proton cases and consider the maximal... |
astro-ph0501168 | i | in the past few years , evidence has emerged that the fine - structure constant , @xmath5 , may have been smaller in high - redshift quasar ( qso ) absorption systems than the value measured today on earth ( e.g. * ? ? ? * ; * ? ? ? * hereafter ) . a possible explanation for the lower - redshift half of this result is ... | at redshifts , quasar absorption - line constraints on space - time variations in the fine - structure constant , , rely on the comparison of mgii and feii transition wavelengths . one potentially important uncertainty is the relative abundance of mg isotopes in the absorbers which , if different from solar , can cause... | at redshifts , quasar absorption - line constraints on space - time variations in the fine - structure constant , , rely on the comparison of mgii and feii transition wavelengths . one potentially important uncertainty is the relative abundance of mg isotopes in the absorbers which , if different from solar , can cause... |
0810.4154 | r | we now discuss a number of mhd jet formation simulations covering a wide parameter range ( see tab . [ tab_all ] ) concerning both the magnitude of the disk and stellar wind mass load and magnetic flux , respectively . the results presented here are preliminary in the sense that not all simulation runs could be perform... | stellar and disk wind may evolve in a pair of collimated outflows . the existence of a reasonably strong disk wind component is essential for collimation . a disk jet as known from previous numerical studies will become de - collimated by the stellar wind . in some simulations we observe the generation of strong flares... | axisymmetric magnetohydrodynamic ( mhd ) simulations have been applied to investigate the interrelation of a central stellar magnetosphere and stellar wind with a surrounding magnetized disk outflow and how the overall formation of a large scale jet is affected . the initial magnetic field distribution applied is a sup... |
1109.6756 | c | in this paper we have investigated the demixing phase transition of a binary mixture of magnetic and non - magnetic soft - core particles from both a static and a dynamic point of view . to this end we have employed classical equilibrium dft as well as the recently developed ddft@xcite , a time - dependent extension of... | based on classical density functional theory ( dft ) , we investigate the demixing phase transition of a two - dimensional , binary heisenberg fluid mixture . we find a demixing phase transition driven by the ferromagnetic interactions of the magnetic species . we also provide a microscopic description ( i.e. , density... | based on classical density functional theory ( dft ) , we investigate the demixing phase transition of a two - dimensional , binary heisenberg fluid mixture . the particles in the mixture are modeled as gaussian soft spheres , where one component is characterized by an additional classical spin - spin interaction of he... |
1501.05260 | i | reversible computation has gained more and more attention in many application areas , such as the modeling of biochemical systems , program debugging and testing , and also quantum computing . quantum computing is one of the most important application areas of reversible computation . there are several research works o... | based on the axiomatization of reversible computing racp , we generalize it to quantum reversible computing which is called qracp . by use of the framework of quantum configuration , we show that structural reversibility and quantum state reversibility must be satisfied simultaneously in quantum reversible computation ... | based on the axiomatization of reversible computing racp , we generalize it to quantum reversible computing which is called qracp . by use of the framework of quantum configuration , we show that structural reversibility and quantum state reversibility must be satisfied simultaneously in quantum reversible computation ... |
hep-th0403013 | i | it is well known that there are different kinds of kinematics on homogeneous ( 3 + 1)-d space - times @xcite , and all of them can be contracted from minkowski , de sitter or anti - de sitter spacetimes under group contraction @xcite , respectively . among them , newton - hooke ( nh ) space - times @xmath1 introduced ... | based on the beltrami - de sitter spacetime , we present the newton - hooke model under the newton - hooke contraction of the spacetime with respect to the transformation group , algebra and geometry . it is shown that in newton - hooke space - time , there are inertial - type coordinate systems and inertial - type obs... | based on the beltrami - de sitter spacetime , we present the newton - hooke model under the newton - hooke contraction of the spacetime with respect to the transformation group , algebra and geometry . it is shown that in newton - hooke space - time , there are inertial - type coordinate systems and inertial - type obs... |
1406.1972 | i | the study of local and global properties of the cauchy transform and the cauchy - stieltjes integral was initiated by a. cauchy and t. stieltjes in the middle of the 19th century . large numbers of papers and several books are partially or completely devoted to this area which is closely connected with the potential ... | below we discuss the existence of a motherbody measure for the exterior inverse problem in potential theory in the complex plane . more exactly , we study the question of representability almost everywhere ( a.e . ) in of ( a branch of ) an irreducible algebraic function as the cauchy transform of a signed measure supp... | below we discuss the existence of a motherbody measure for the exterior inverse problem in potential theory in the complex plane . more exactly , we study the question of representability almost everywhere ( a.e . ) in of ( a branch of ) an irreducible algebraic function as the cauchy transform of a signed measure supp... |
1204.2544 | r | the main target of this work is the estimate of the total energy flux @xmath57 transported by alfvn waves off - limb in polar coronal hole up to @xmath4 r@xmath0 . to this end , we need both a determination of the electron density @xmath58 and the non - thermal velocity @xmath59 at different altitudes . the determinati... | results show that the fwhm of fe xii.12 line increases up to r , then decreases higher up . derived electron density and non - thermal velocity profiles have been used to estimate the total energy flux transported by alfvn waves off - limb in polar coronal hole up to r . | between february 24 - 25 , 2009 , the eis spectrometer onboard the hinode spacecraft performed special `` sit & stare '' observations above the south polar coronal hole continuously over more than 22 hours . spectra were acquired with the 1 slit placed off - limb covering altitudes up to 0.48 r ( mm ) above the sun su... |
1212.2232 | i | the process of coagulation or aggregation is responsible for the coarsening of a size distribution of particles suspended in gaseous or liquid media . in essence the phenomenon consists of a sequence of statistically independent events where two ( or possibly more ) particles unite , perhaps as a result of collision , ... | the kinetics can be represented by population rate equations based on a mean field assumption , according to which the rate of aggregation is taken to be proportional to the product of the _ mean _ populations of the two participants . such an approach is explored for the simple case of a size - independent rate of coa... | binary particle coagulation can be modelled as the repeated random process of the combination of two particles to form a third . the kinetics can be represented by population rate equations based on a mean field assumption , according to which the rate of aggregation is taken to be proportional to the product of the _ ... |
1212.2232 | c | we have outlined in this paper how to solve a simple coagulation problem using some rather elaborate analytical and numerical methods , retrieving results that were previously either known , or computable from the master equations . the effort has not been misdirected , however , since our aim has been to establish tha... | however , using the poisson representation it is possible to derive a set of rate equations that go beyond mean field theory , describing pseudo - populations that are continuous , noisy and complex , but where averaging over the noise and initial conditions gives the mean of the physical population . such an approach ... | binary particle coagulation can be modelled as the repeated random process of the combination of two particles to form a third . the kinetics can be represented by population rate equations based on a mean field assumption , according to which the rate of aggregation is taken to be proportional to the product of the _ ... |
1407.1218 | i | the strong cp problem is elegantly resolved by introducing a peccei - quinn ( pq ) symmetry @xcite and its spontaneous breaking resulting in a dynamical field called the axion @xcite . in this mechanism , the cp - violating qcd @xmath1 term is determined by a vacuum expectation value of the axion which dynamically canc... | both the naturalness of the electroweak symmetry breaking and the resolution of the strong cp problem may require a small higgsino mass generated by a realization of the dfsz axion model . copiously produced light higgsinos at collider ( effectively only neutral nlsp pairs ) eventually decay to axinos leaving prompt mu... | both the naturalness of the electroweak symmetry breaking and the resolution of the strong cp problem may require a small higgsino mass generated by a realization of the dfsz axion model . assuming the axino is the lightest supersymmetric particle , we study its implications on and the axion scale . copiously produced ... |
1601.07474 | i | the search for lightning in the solar system has benefited from an increasing variety of space missions ( e.g. venus express , cassini ) . lightning is the most observed flash transient process , that is a powerful but brief , short term processes leading to a local burst of ionisation . characteristic optical and radi... | detection of such flash ionisation events will open investigations into the ionisation state and atmospheric dynamics . our work suggests that cyclotron emission could be probe signals for electrification processes inside bd atmosphere . [ firstpage ] physical data and processes : instabilities radiation mechani... | brown dwarfs form mineral clouds in their atmospheres , where charged particles can produce large - scale discharges in form of lightning resulting in substantial sudden increase of local ionisation . brown dwarfs are observed to emit cyclotron radio emission . we show that signatures of strong transient atmospheric io... |
hep-lat0112009 | i | simulation studies of nambu - jona lasinio models have proven to be much more quantitative than those of other field theories @xcite . in particular , the logarithmic triviality of these models has been demonstrated , although determining logarithmic singularities decorating mean field scaling laws is a daunting numeri... | by adding a small , irrelevant four fermi interaction to the action of noncompact lattice quantum electrodynamics ( qed ) , the theory can be simulated with massless quarks in a vacuum free of lattice monopoles . the lattice theory possesses a second order chiral phase transition which we show is logarithmically trivia... | by adding a small , irrelevant four fermi interaction to the action of noncompact lattice quantum electrodynamics ( qed ) , the theory can be simulated with massless quarks in a vacuum free of lattice monopoles . simulations directly in the chiral limit of massless quarks are done with high statistics on , and lattices... |
0902.0033 | i | the properties of magnetic impurities in a metal is one of the most intensively studied problems in solid state physics . the work of friedel @xcite and anderson @xcite laid the foundation to understand why some transition - metal impurities form a local magnetic moment while others do nt . kondo @xcite showed that mul... | by applying a magnetic field whose zeeman energy exceeds the kondo energy by an order of magnitude the ground state of the friedel - anderson impurity is a magnetic state . in recent years the author introduced the magnetic ground state is derived . its full excitation spectrum and the composition of the excitations is... | by applying a magnetic field whose zeeman energy exceeds the kondo energy by an order of magnitude the ground state of the friedel - anderson impurity is a magnetic state . in recent years the author introduced the friedel artificially inserted resonance ( fair ) method to investigate impurity properties . within this ... |
astro-ph9903331 | i | the diffuse , ionized medium ( dim ) , a.k.a the `` reynolds layer , '' has been established to occupy a significant fraction of the interstellar medium ( ism ) and to have a vertical scale height of @xmath16 1 kpc ( @xcite ) . it is widely believed that ob associations are the sources of radiation responsible for ioni... | by solving the time - dependent radiation transfer problem of stellar radiation through evolving superbubbles within a smoothly varying h i distribution , we estimate the fraction of ionizing photons emitted by ob associations that escapes the h i disk of our galaxy into the halo and intergalactic medium ( igm ) . su... | by solving the time - dependent radiation transfer problem of stellar radiation through evolving superbubbles within a smoothly varying h i distribution , we estimate the fraction of ionizing photons emitted by ob associations that escapes the h i disk of our galaxy into the halo and intergalactic medium ( igm ) . we... |
astro-ph9903331 | r | in figure [ fig : etaesct - coeval ] we show the photon luminosity , emitted by a single ob association having @xmath26 stars , and the luminosity of photons escaping each side of the h i disk as a function of time . here , the stars are assumed to form coevally . notice that the fraction of escaping photons , @xmath1... | however , blowout occurs when the ionizing photon luminosity has dropped well below the association s maximum luminosity . for the coeval star - formation history , the total fraction of lyman continuum photons that escape both sides of the disk in the solar vicinity is . for the gaussian star formation history , , a v... | by solving the time - dependent radiation transfer problem of stellar radiation through evolving superbubbles within a smoothly varying h i distribution , we estimate the fraction of ionizing photons emitted by ob associations that escapes the h i disk of our galaxy into the halo and intergalactic medium ( igm ) . we... |
astro-ph9903331 | c | we find that @xmath307% for the coeval star - formation history and @xmath308% for the gaussian star - formation history . for @xmath309 s@xmath5 , @xmath310 , and @xmath196 , we obtain @xmath311% for the coeval sfh and @xmath312% for the gaussian sfh . adopting a production rate , @xmath313 @xmath4 s@xmath5 , the corr... | we consider both a uniform h i distribution and a two - phase ( cloud / intercloud ) model , with a negligible filling factor of hot gas . we find that the shells of the expanding superbubbles quickly trap or attenuate the ionizing flux , so that most of the escaping radiation escapes shortly after the formation of th... | by solving the time - dependent radiation transfer problem of stellar radiation through evolving superbubbles within a smoothly varying h i distribution , we estimate the fraction of ionizing photons emitted by ob associations that escapes the h i disk of our galaxy into the halo and intergalactic medium ( igm ) . we... |
cond-mat0312563 | i | many structures in the biological world grow so slowly that they adopt a shape that can be considered as a minimizer of some configurational energy associated solely with the _ internal _ structure . the logarithmic spiral of the nautilus shell is an example . it enlarges through a process of differential growth whereb... | any microscopic theory of these morphological instabilities must address the nature of pattern selection in the presence of _ growth _ , for growth renders the problem nonautonomous and the bifurcations dynamic . to gain insight into these phenomena , we formulate a general theory for growing elastic filaments with ben... | certain bacteria form filamentous colonies when the cells fail to separate after dividing . in _ bacillus subtilis _ , _ bacillus thermus _ , and _ cyanobacteria _ , the filaments can wrap into complex supercoiled structures as the cells grow . the structures may be solenoids or plectonemes , with or without branches i... |
1210.4023 | i | the determination of depths of formation of the observed stokes parameter profiles for magnetically sensitive fraunhofer lines still remains a topical problem of the spectral analysis which is used for obtaining information on the fine structure of magnetic field in the solar photosphere . the problem of the depth of l... | the averaged depth of formation of the whole line profile is practically independent of the magnetic field strength . the depths of formation of 17 photospheric lines usually used in magnetospectroscopic observations are calculated for the models of the quiet photosphere , a flux tube , and the sunspot umbra . | characteristics of the depression contribution functions are studied for the stokes line profiles formed in a magnetic field . the form of the depression functions depends mainly on the strength of splitting and the zeeman component intensity , and is of a complicated character with a distinctly pronounces asymmetry . ... |
1210.4023 | c | the depression contribution functions for the stokes parameters of magnetically active absorption lines are of a complex nature in the conditions of the solar atmosphere in the regions where a strong magnetic field is present . the depression functions may be considered as a result of combining the contribution functio... | the form of the depression functions depends mainly on the strength of splitting and the zeeman component intensity , and is of a complicated character with a distinctly pronounces asymmetry . the stokes profiles that describe the polarization characteristics are formed only several kilometers higher than the stokes pr... | characteristics of the depression contribution functions are studied for the stokes line profiles formed in a magnetic field . the form of the depression functions depends mainly on the strength of splitting and the zeeman component intensity , and is of a complicated character with a distinctly pronounces asymmetry . ... |
1311.6321 | i | entanglement is regarded as one of the key resources for various applications in quantum information processing . while entanglement of bipartite systems is well understood @xcite , the characterization of multipartite entanglement is still an interesting research topic . it has been shown @xcite that there are two ine... | circuit cavity quantum electrodynamics ( qed ) is proving to be a powerful platform to implement quantum feedback control schemes due to the ability to control superconducting qubits and microwaves in a circuit . here , we present a simple and promising quantum feedback control scheme for deterministic generation and s... | circuit cavity quantum electrodynamics ( qed ) is proving to be a powerful platform to implement quantum feedback control schemes due to the ability to control superconducting qubits and microwaves in a circuit . here , we present a simple and promising quantum feedback control scheme for deterministic generation and s... |
1311.6321 | c | in conclusion , we have presented a simple and promising quantum feedback control scheme for deterministic generation and stabilization of a three - qubit @xmath134 state in a superconducting circuit qed setup , taking into account the realistic conditions of decoherence and decay . our scheme is based on continuous jo... | the control scheme is based on continuous joint zeno measurements of multiple qubits in a dispersive regime , which enables us not only to infer the state of the qubits for further information processing but also to create and stabilize the target state through adaptive quantum feedback control . we simulate the dynami... | circuit cavity quantum electrodynamics ( qed ) is proving to be a powerful platform to implement quantum feedback control schemes due to the ability to control superconducting qubits and microwaves in a circuit . here , we present a simple and promising quantum feedback control scheme for deterministic generation and s... |
0705.3142 | i | we study flat surfaces having conical singularities of angle integer multiple of @xmath1 and @xmath2 linear holonomy . the moduli space of such surfaces is isomorphic to the moduli space of quadratic differentials on riemann surfaces and is naturally stratified . flat surfaces corresponding to squares of abelian differ... | configurations of rigid collections of saddle connections are connected component invariants for strata of the moduli space of quadratic differentials . they have been classified for strata of abelian differentials by eskin , masur and zorich . similar work for strata of quadratic differentials has been done in masur a... | configurations of rigid collections of saddle connections are connected component invariants for strata of the moduli space of quadratic differentials . they have been classified for strata of abelian differentials by eskin , masur and zorich . similar work for strata of quadratic differentials has been done in masur a... |
1307.7930 | i | the aim of this paper is to investigate the behavior of dirichlet eigenvalues in varying domains , when a shrinking cylindrical handle is attached to a smooth region , seeking not only for the rate of convergence but also for sharp asymptotics . since we consider a tubular handle with a cross - section of radius of ord... | , we improve this information providing a sharp control of the rate of convergence of the eigenvalues and eigenfunctions in the perturbed domain to the relative eigenvalue and eigenfunction in the limit domain . as an application , we prove that , again under an explicit nondegeneracy condition , the case of resonant d... | consider two domains connected by a thin tube : it can be shown that the resolvent of the dirichlet laplacian is continuous with respect to the channel section parameter . this in particular implies the continuity of isolated simple eigenvalues and the corresponding eigenfunctions with respect to domain perturbation . ... |
1307.7930 | i | in this section we drop assumption and treat the case in which @xmath407 is a double eigenvalue on @xmath630 and a simple eigenvalue on each of the components @xmath4 and @xmath3 . to this aim , we exploit twice the sharp asymptotics provided by theorem [ teo_asintotico_autovalori ] in two domains obtained by attaching... | consider two domains connected by a thin tube : it can be shown that the resolvent of the dirichlet laplacian is continuous with respect to the channel section parameter . this in particular implies the continuity of isolated simple eigenvalues and the corresponding eigenfunctions with respect to domain perturbation . ... | consider two domains connected by a thin tube : it can be shown that the resolvent of the dirichlet laplacian is continuous with respect to the channel section parameter . this in particular implies the continuity of isolated simple eigenvalues and the corresponding eigenfunctions with respect to domain perturbation . ... |
cond-mat0602442 | c | the consensus so far was that random ( ga , in)p is the only alloy that exhibits the so - called modified 2-mode behavior in the raman / ir spectra , with a dominant to mode at low frequency that joins the parent to modes and a minor to mode at high frequency that connects the impurity modes . here we show that ( ga , ... | contrary to a broadly accepted assumption we show that random ( ga , in)p is not an exception with respect to the crude classification of the phonon mode behavior of random mixed crystals in terms of 1-bond-mode systems or 2-bond-mode systems , as established from the simple criterion derived by elliott _ et al . _ [ r... | contrary to a broadly accepted assumption we show that random ( ga , in)p is not an exception with respect to the crude classification of the phonon mode behavior of random mixed crystals in terms of 1-bond-mode systems or 2-bond-mode systems , as established from the simple criterion derived by elliott _ et al . _ [ r... |
1608.01291 | i | cooperation is a backbone of our existence as an extraordinary social species . it enables the joint pursuit of political objectives and the more prosaic foundations of everyday life @xcite . yet how human cooperation is achieved and persist is still one of the main puzzles in science @xcite . one reason is the lack ... | while several mechanisms of self - governance for supporting cooperation , such as peer punishment , reciprocity , and social norms have been extensively explored , the impact of cooperation on the ability of human groups to absorb changes and still persist , their resilience , has received less attention . here we dev... | cooperation among humans is crucial for overcoming some of the most pressing social challenges of our time like climate change , financial crises , and over exploitation of natural resources . while several mechanisms of self - governance for supporting cooperation , such as peer punishment , reciprocity , and social n... |
1110.2583 | i | the acceleration of the expansion rate of the universe is still a deep mystery despite more than ten years of intense activity both experimentally@xcite and theoretically@xcite . if the acceleration of the universe is due to an unknown form of matter , dark energy , it comprises more than seventy percent of the energy ... | three known mechanisms have been proposed to restore general relativity in the solar system and the laboratory , which are the symmetron / damour - polyakov effect , the vainshtein property and the chameleon screening . here , we propose to probe the existence of chameleons in the laboratory , considering their particl... | dark energy models , such as the chameleon , where the acceleration of the expansion of the universe results from the dynamics of a scalar field coupled to matter , suffer from the potential existence of a fifth force . three known mechanisms have been proposed to restore general relativity in the solar system and the ... |
1110.2583 | c | we have studied the creation of chameleons inside the sun by the primakoff effect and their back - conversion to soft x - ray photons in the magnetised photosphere , the corona and helioscopes on earth by the inverse primakoff effect . the production of chameleons is strongly dependent on the assumed features of the ma... | we envisage the resonant and non - resonant production of chameleons in the sun and their back - conversion into x - ray photons in a solar helioscope pipe such as the one used by cast . such chameleons could leave the sun and be back - converted into x - ray photons above the photosphere or in the magnetic pipe of a h... | dark energy models , such as the chameleon , where the acceleration of the expansion of the universe results from the dynamics of a scalar field coupled to matter , suffer from the potential existence of a fifth force . three known mechanisms have been proposed to restore general relativity in the solar system and the ... |
1402.0889 | c | using the combined photometry from our subarray images and the available archival full - frame images , we found four potentially interesting candidates : one with matching brown dwarf colors and three objects with compatible [ 3.6]@xmath2[4.5 ] color lower limits . in absence of common proper motion confirmation , we ... | we report the results of our _ spitzer_/infrared array camera ( irac ) imaging search for widely separated ( 10 25 ) substellar - mass companions for 14 planet - host stars within 15 pc of the sun . using deep 3.6 and 4.5 m observations in subarray mode , we found one object in the field of 47 uma with [ 3.6][4.5 ]... | determining the presence of widely separated substellar - mass companion is crucial to understand the dynamics of inner planets in extrasolar planetary systems ( e.g. to explain their high mean eccentricity as inner planets are perturbed by the kozai mechanism ) . we report the results of our _ spitzer_/infrared array ... |
0711.2215 | r | by adopting the atomic data described in above section , line emissivities of si vii si xii are calculated at an electron density of 3.0@xmath23 @xmath24 and electron temperatures ranging 0.15 mk . the electron density is a typical value for cool star with lower activities as revealed by previous works @xcite . t... | ( 2002 , a&a , * 389 * , 228 ) , the theoretical line fluxes are predicted , and the theoretical spectra are constructed by assuming the gaussian profile with instrumental broadening ( 0.06 ) . by detailed comparison between observation and predictions , several emissions lines are identified firstly such as emission... | different observation data for cool star procyon ( obs_ids of 63 , 1461 and 1224 ) available from _ chandra data public archive _ were co - added and analyzed . emissivities of emission lines of highly charged silicon ions ( si vii si xii ) were calculated over temperatures by adopting the published data of liang e... |
0711.2215 | c | in summary , available observation data ( obs_ids of 63 , 1461 and 1224 ) for cool star procyon are co - added and analyzed . by adopting our published atomic data and some unpublished data , line emissivities of si vi si xii ions are calculated at an electron density of 3.0@xmath23 @xmath24 ( typical value for co... | data tables _ , * 93 * , 375 ) . using the emission measure derived by raassen et al . the prediction reveals the large discrepancies between the line ( 63.715 ) _ versus _ line ( 61.012 ) again for lower charge stage si viii . | different observation data for cool star procyon ( obs_ids of 63 , 1461 and 1224 ) available from _ chandra data public archive _ were co - added and analyzed . emissivities of emission lines of highly charged silicon ions ( si vii si xii ) were calculated over temperatures by adopting the published data of liang e... |
0810.5663 | i | is complexity ? a great deal of research has been performed on the question in what sense some objects are `` more complicated '' than others , and how this fact and its consequences can be analyzed mathematically . one of the most well - known complexity measures is _ kolmogorov complexity _ @xcite , also called _ alg... | effective complexity measures the information content of the regularities of an object . it has been introduced by m. gell - mann and s. lloyd to avoid some of the disadvantages of kolmogorov complexity , also known as algorithmic information content . in this paper furthermore , we show that effective complexity is re... | effective complexity measures the information content of the regularities of an object . it has been introduced by m. gell - mann and s. lloyd to avoid some of the disadvantages of kolmogorov complexity , also known as algorithmic information content . in this paper , we give a precise formal definition of effective co... |
1211.1843 | i | electronic transport in weakly disordered metals is successfully described by the boltzmann theory , in which electrons are treated as effectively classical particles moving freely between scattering events . the wave nature of electrons gives rise to a number of corrections to transport properties , such as the weak l... | electron - electron interactions are responsible for a correction to the conductance of a diffusive metal , the `` altshuler - aronov correction '' . here , the ehrenfest time enters as an additional time scale that determines the magnitude of quantum interference effects . the ehrenfest time effectively poses a short ... | electron - electron interactions are responsible for a correction to the conductance of a diffusive metal , the `` altshuler - aronov correction '' . here we study the counterpart of this correction for a ballistic conductor , in which the electron motion is governed by chaotic classical dynamics . in the ballistic con... |
1302.5880 | i | in recent years , single - layer graphene has received much attention due to its two dimensionality , dirac - like energy spectrum and outstanding spin - coherence properties.@xcite specifically , the hyperfine interaction and spin - orbit coupling ( soc ) are considerably weak,@xcite suggesting a long spin relaxation ... | electron spin relaxation due to the dyakonov - perel mechanism is investigated in bilayer graphene with only the lowest conduction band being relevant . et al . _ rev . b * 85 * , 115423 ( 2012 ) ] from first principles . in contrast to single - layer graphene , the leading term of the out - of - plane component of the... | electron spin relaxation due to the dyakonov - perel mechanism is investigated in bilayer graphene with only the lowest conduction band being relevant . the spin - orbit coupling is constructed from the symmetry group analysis with the parameters obtained by fitting to the numerical calculation according to the latest ... |
1302.5880 | i | in summary , we have investigated the electron spin relaxation due to the dp mechanism in blg with only the lowest conduction band being relevant . the soc of the lowest conduction band is constructed from the symmetry group analysis with the parameters obtained by fitting to the numerical calculation according to the ... | the spin - orbit coupling is constructed from the symmetry group analysis with the parameters obtained by fitting to the numerical calculation according to the latest report by konschuh _ it is shown that the intervalley electron - phonon scattering , which has not been reported in the previous literature , strongly su... | electron spin relaxation due to the dyakonov - perel mechanism is investigated in bilayer graphene with only the lowest conduction band being relevant . the spin - orbit coupling is constructed from the symmetry group analysis with the parameters obtained by fitting to the numerical calculation according to the latest ... |
1308.4225 | i | macroscopic quantum phenomena ( mqp ) refer to quantum features in objects of ` large ' sizes , systems with many components or degrees of freedom , organized in some ways where they can be identified as macroscopic objects . what makes mqp interesting is because in the traditional view ` quantum ' belongs to the micro... | , we provide a proof of the conditions whereby the com variable decouples , a cause for the special role the com variable plays in the entanglement between two such macroscopic objects . this offers another way to determine under what conditions quantum entanglement between macroscopic objects can persist . macroscopic... | entanglement being a uniquely quantum attribute , to gain a better understanding of the nature of macroscopic quantum phenomena we explore in this paper ways to qualify and quantify the quantum entanglement between two macroscopic objects by way of model studies . knowing that a macroscopic object is a composite , how ... |
1505.00569 | i | epidemic outbreak in a populated center or in a network of populated centra develops stochastically due to random interaction between individuals inside a center and due to a random migration between centers of the network . conventionally , an epidemic outbreak in a highly populated center is described by deterministi... | epidemic dynamics in a stochastic network of interacting epidemic centers is considered . the epidemic and migration processes are modelled by markov s chains . explicit formulas for probability distribution of the migration process are derived . dependence of outbreak parameters on initial parameters , population , co... | epidemic dynamics in a stochastic network of interacting epidemic centers is considered . the epidemic and migration processes are modelled by markov s chains . explicit formulas for probability distribution of the migration process are derived . dependence of outbreak parameters on initial parameters , population , co... |
1004.5086 | i | one of the central ideas of quantum mechanics is the uncertainty principle which was first proposed by heisenberg @xcite for two conjugate observables . indeed , it forms one of the most significant examples showing that quantum mechanics does differ fundamentally from the classical world . uncertainty relations today... | even though mutually unbiased bases and entropic uncertainty relations play an important role in quantum cryptographic protocols they remain ill understood . here , we construct special sets of up to mutually unbiased bases ( mubs ) in dimension which have particularly beautiful symmetry properties derived from the cli... | even though mutually unbiased bases and entropic uncertainty relations play an important role in quantum cryptographic protocols they remain ill understood . here , we construct special sets of up to mutually unbiased bases ( mubs ) in dimension which have particularly beautiful symmetry properties derived from the cli... |
1405.4012 | i | opacity quantifies photon absorption in matter and plays a crucial role in many high energy density ( he d ) plasmas , including inertial fusion plasmas and stellar interiors . modeling opacity is especially challenging when the plasma is composed of partially - ionized atoms with many bound electrons . first , one mus... | experimental tests are in progress to evaluate the accuracy of the modeled iron opacity at solar interior conditions , in particular to better constrain the solar abundance problem [ s. basu and h.m . antia , physics reports 457 , 217 ( 2008 ) ] . here we describe measurements addressing three of the key requirements f... | experimental tests are in progress to evaluate the accuracy of the modeled iron opacity at solar interior conditions , in particular to better constrain the solar abundance problem [ s. basu and h.m . antia , physics reports 457 , 217 ( 2008 ) ] . here we describe measurements addressing three of the key requirements f... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.