publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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1999-03-16 | Vortex Solutions of Nonrelativistic Fermion and Scalar Field Theories Coupled to Maxwell-Chern-Simons theories | We have constructed nonrelativistic fermion and scalar field theories coupled
to a Maxwell-Chern-Simons gauge field which admit static multi-vortex
solutions. This is achieved by introducing a magnetic coupling term in addition
to the usual minimal coupling. | 9903138v2 |
1999-04-06 | Some Speculations on the Gauge Coupling in the AdS/CFT Approach | We propose the principle that the scale of the glueball masses in the AdS/CFT
approach to QCD should be set by the square root of the string tension. It then
turns out that the strong bare coupling runs logarithmically with the
ultraviolet cutoff T if first order world sheet fluctuations are included. We
also point out... | 9904034v2 |
1999-10-26 | A Simple Proof of the Non-Renormalization of the Chern-Simons Coupling | We give a very simple proof that the renormalization of the Chern-Simons
coupling in the Wilsonian effective action is exhausted at one-loop. Our proof
can apply to arbitrary 2+1-dimensional abelian as well as nonabelian gauge
theories without a bare Chern-Simons coupling, including any non-renormalizable
interactions ... | 9910200v3 |
2000-05-24 | Supergravity couplings: a geometric formulation | This report provides a pedagogical introduction to the description of the
general Poincare supergravity/matter/Yang-Mills couplings using methods of
Kahler superspace geometry. At a more advanced level this approach is
generalized to include tensor field and Chern-Simons couplings in supersymmetry
and supergravity, rel... | 0005225v1 |
2000-11-01 | Scale Invariance in a Non-Abelian Chern-Simons-Matter Model | The general method of reduction in the number of coupling parameters is
applied in a Chern-Simons-matter model with several independent couplings. We
claim that considering the asymptotic region, and expressing all dimensionless
coupling parameters as functions of the Chern-Simons coupling, it is possible
to show that ... | 0011007v3 |
2000-12-18 | Holography and Phenomenology | We examine various aspects of the conjectured duality between warped AdS$_5$
geometries with boundary branes and strongly coupled (broken) conformal field
theories coupled to dynamical gravity. We also examine compactifications with
5-d gauge fields, in which case the holographic dual is a broken CFT weakly
coupled to ... | 0012148v1 |
2001-06-15 | "Dynamical" non-minimal higher-spin interaction and gyromagnetic ratio g=2 | The field-dependent invariant representation (the "dynamical" representation)
of the Poincar\'e algebra is considered as a dynamical principle in order to
get the corresponding "dynamical" electromagnetic coupling for higher spins
($s\geq 1$). If in lower-spin ($s=0,1/2$) cases the "dynamical" coupling is
taken to coin... | 0106137v1 |
2001-07-11 | Ramond-Ramond Couplings of Noncommutative Branes | We obtain the couplings of noncommutative branes of type II string theories
to constant Ramond-Ramond backgrounds, for BPS as well as non-BPS branes, in
the background-independent description. For the BPS branes, we also generalize
these couplings to other descriptions, and thereby argue their equivalence to
the known ... | 0107087v2 |
2001-08-16 | Unification and the Hierarchy from AdS5 | In AdS5, the coupling for bulk gauge bosons runs logarithmically, not as a
power law. For this reason, one can preserve perturbative unification of
couplings. Depending on the cutoff, this can occur at a high scale. We discuss
subtleties in the calculation and present a regularization scheme motivated by
the holographi... | 0108115v1 |
2004-06-29 | A Curious Truncation of N=4 Yang-Mills | The coupling constant dependence of correlation functions of BPS operators in
N=4 Yang-Mills can be expressed in terms of integrated correlation functions.
We approximate these integrated correlators by using a truncated OPE expansion.
This leads to differential equations for the coupling dependence. When applied
to a ... | 0406267v2 |
2004-09-22 | Bounding Gauged Skyrmion Masses | Normally, standard (ungauged) skyrmion masses are proportional to the
coupling of the Skyrme term needed for stability, and so can grow to infinite
magnitude with increasing coupling. In striking contrast, when skyrmions are
gauged, their masses are bounded above for any Skyrme coupling, and, instead,
are of the order ... | 0409222v1 |
2004-12-21 | The symmetric branes of the H4 WZW model | We review the solution of the boundary CFTs that describe the symmetric
branes in the Nappi-Witten gravitational wave, namely D2 and S1 branes. The D2
branes are the twisted branes of the model while the S1 branes are the Cardy
branes. We present in both cases the bulk-boundary couplings and the boundary
three-point co... | 0412258v2 |
2005-09-07 | Gravitational Correction to Running of Gauge Couplings | We calculate the contribution of graviton exchange to the running of gauge
couplings at lowest non-trivial order in perturbation theory. Including this
contribution in a theory that features coupling constant unification does not
upset this unification, but rather shifts the unification scale. When
extrapolated formall... | 0509050v2 |
2005-12-13 | Time variation of the gravitational coupling constant in decrumpling cosmology | Within the framework of a model universe with time variable space dimension
(TVSD) model, known as decrumpling or TVSD model, we study the time variation
of the gravitational coupling constant. Using observational bounds on the
present time variation of the gravitational Newton's constant in
three-dimensional space we ... | 0512139v3 |
2006-10-19 | AdS/CFT duality at strong coupling | We study the strong coupling limit of AdS/CFT correspondence in the framework
of a recently proposed fermionic formulation of the Bethe Ansatz equations
governing the gauge theory anomalous dimensions. We provide examples of states
that do not follow the Gubser-Klebanov-Polyakov law at large 't Hooft coupling
$\lambda$... | 0610215v1 |
2007-03-21 | On the coupling of tensors to gauge fields: D=5, N=2 supergravity revisited | A general free differential algebra encoding the anti-Higgs mechanism among
two-index antisymmetric tensors and gauge vectors is analyzed at the full group
theoretical level. N=2 supergravity in five dimensions coupled to tensor,
vector and hyper multiplets with all possible couplings included is
reconsidered from this... | 0703188v1 |
1992-09-25 | Calderón couples of re-arrangement invariant spaces | We examine conditions under which a pair of re-arrangement invariant function
spaces on $[0,1]$ or $[0,\infty)$ form a Calder\'on couple. A very general
criterion is developed to determine whether such a pair is a Calder\'on couple,
with numerous applications. We give, for example, a complete classification of
those sp... | 9209217v1 |
2005-04-21 | Block-diagonalization of the linearized coupled-mode system | We consider the Hamiltonian coupled-mode system that occur in nonlinear
optics, photonics, and atomic physics. Spectral stability of gap solitons is
determined by eigenvalues of the linearized coupled-mode system, which is
equivalent to a four-by-four Dirac system with sign-indefinite metric. In the
special class of sy... | 0504442v1 |
2005-12-14 | Coupling all the Lévy stochastic areas of multidimensional Brownian motion | It is shown how to construct a successful co-adapted coupling of two copies
of an $n$-dimensional Brownian motion $(B_1,...,B_n)$ while simultaneously
coupling all corresponding copies of L\'{e}vy stochastic areas $\int B_i
dB_j-\int B_j dB_i$. It is conjectured that successful co-adapted couplings
still exist when the... | 0512336v2 |
2006-09-29 | Enhanced binding for N-particle system interacting with a scalar bose field I | An enhanced binding of an $N$-particle system interacting through a scalar
bose field is investigated, where $N\geq 2$. It is not assumed that this system
has a ground state for a zero coupling. It is shown, however, that there exists
a ground state for a sufficiently large values of coupling constants. When the
coupli... | 0609086v1 |
2006-12-12 | The bipolaron in the strong coupling limit | The bipolaron are two electrons coupled to the elastic deformations of an
ionic crystal. We study this system in the Fr\"{o}hlich approximation. If the
Coulomb repulsion dominates, the lowest energy states are two well separated
polarons. Otherwise the electrons form a bound pair. We prove the validity of
the Pekar-Tom... | 0612035v1 |
2007-03-16 | Approximations of singular vertex couplings in quantum graphs | We discuss approximations of the vertex coupling on a star-shaped quantum
graph of $n$ edges in the singular case when the wave functions are not
continuous at the vertex and no edge-permutation symmetry is present. It is
shown that the Cheon-Shigehara technique using $\delta$ interactions with
nonlinearly scaled coupl... | 0703051v1 |
1998-04-01 | Bilinearization of coupled nonlinear Schrödinger type equations: integrabilty and solitons | Considering the coupled envelope equations in nonlinear couplers, the
question of integrability is attempted. It is explicitly shown that Hirota's
bilinear method is one of the simple and alternative techniques to Painlev\'e
analysis to obtain the integrability conditions of the coupled nonlinear
Schr\"odinger (CNLS) t... | 9804202v1 |
2000-09-27 | Synchronization of rescaled adaptive coupling and its application to shock capturing | This Letter proposes a rescaled adaptive coupling scheme for the
synchronization of spatially extended systems. Coupling and synchronization are
analyzed from the point view of image filter construction. A length rescaling
technique is introduced based on dimensional argument of control process.
Control sensors are ada... | 0009048v1 |
2001-04-09 | Effective Coupling for Open Billiards | We derive an explicit expression for the coupling constants of individual
eigenstates of a closed billiard which is opened by attaching a waveguide. The
Wigner time delay and the resonance positions resulting from the coupling
constants are compared to an exact numerical calculation. Deviations can be
attributed to eva... | 0104023v1 |
2001-04-10 | Information processing by a controlled coupling process | This Letter proposes a controlled coupling process for information
processing. The net effect of conventional coupling is isolated from the
dynamical system and is analyzed in depth. The stability of the process is
studied. We show that the proposed process can locally minimize the smoothness
and the fidelity of dynami... | 0104026v1 |
2001-06-11 | Analysis of Hamiltonian Dynamics of Dispersion-Managed Coupled Breathers in Optical Transmission System | We theoretically derive the Hamiltonian dynamics of dispersion-managed
coupled breathers in optical transmission system as a result of phases-plane
dynamics of the system. We analytically show that the contribution of a
perturbation term caused by a noise sourced by amplifiers in optical fiber can
influence the amplitu... | 0106009v1 |
2001-11-01 | Exact anticipating synchronization in bi-directionally coupled time-delayed systems | We present an analytical investigation of exact anticipating synchronization
between two bi-idirectionally coupled time-delayed systems in the case when
these systems are governed by two characteristic times: the delay time in the
coupling and the delay time in the coupled systems. We apply our approach to
interpret th... | 0111002v1 |
2001-11-02 | Exact Lag Synchronization in Time Delay Systems and Why Experimental Lag Times Can Differ from Theoretical Predictions | We present analytical investigation of exact lag synchronization between two
unidirectionally coupled identical time delay systems with two characteristic
delay times, where the delay time in the coupling is different from the delay
time in the coupled systems themselves. For the first time we demonstrate that
paramete... | 0111006v1 |
2002-02-04 | Information transfer and nontrivial collective behavior in chaotic coupled map networks | The emergence of nontrivial collective behavior in networks of coupled
chaotic maps is investigated by means of a nonlinear mutual prediction method.
The resulting prediction error is used to measure the amount of information
that a local unit possesses about the collective dynamics. Applications to
locally and globall... | 0202010v1 |
2002-03-11 | Different regimes of synchronization in nonidentical time-delayed maps | We study the synchronization of time-delayed nonidentical maps subject to
unidirectional (master-slave) coupling. The individual dynamics of the maps
have a delay n1, and the coupling acts with a delay n2. We show analytically
that, suitably tuning the slave map parameters, two distinct synchronization
regimes can occu... | 0203017v1 |
2002-03-15 | Phase-locked and phase drift solutions of phase oscillators with asymmetric coupling strengths | Phase-locked solutions of coupled oscillators are studied with asymmetric
coupling strengths or inhomogeneous natural frequencies. The solutions show
remarkable profiles of phase lags from the pacemaker corresponding to the ratio
of upward and downward coupling strengths. By means of the existence condition
of phase-lo... | 0203032v1 |
2002-10-07 | Self-organized and driven phase synchronization in coupled maps | We study the phase synchronization and cluster formation in coupled maps on
different networks. We identify two different mechanisms of cluster formation;
(a) {\it Self-organized} phase synchronization which leads to clusters with
dominant intra-cluster couplings and (b) {\it driven} phase synchronization
which leads t... | 0210006v2 |
2002-10-09 | Route to chaotic synchronisation in coupled map lattices: Rigorous results | Two-dimensional mappings obtained by coupling two piecewise increasing
expanding maps are considered. Their dynamics is described when the coupling
parameter increases in the expanding domain. By introducing a coding and by
analysing an admissibility condition, approximations of the corresponding
symbolic systems are o... | 0210019v1 |
2002-10-24 | Stochastic synchronization in globally coupled phase oscillators | Cooperative effects of periodic force and noise in globally Cooperative
effects of periodic force and noise in globally coupled systems are studied
using a nonlinear diffusion equation for the number density. The amplitude of
the order parameter oscillation is enhanced in an intermediate range of noise
strength for a g... | 0210056v1 |
2002-12-27 | General Stability Analysis of Synchronized Dynamics in Coupled Systems | We consider the stability of synchronized states (including equilibrium
point, periodic orbit or chaotic attractor) in arbitrarily coupled dynamical
systems (maps or ordinary differential equations). We develop a general
approach, based on the master stability function and Gershgorin disc theory, to
yield constraints o... | 0212051v1 |
2003-04-02 | Inverse scattering approach to coupled higher order nonlinear Schrödinger equation and N-soliton solutions | A generalized inverse scattering method has been applied to the linear
problem associated with the coupled higher order nonlinear schr\"odinger
equation to obtain it's $N$-soliton solution. An infinite number of conserved
quantities have been obtained by solving a set of coupled Riccati equations. It
has been shown tha... | 0304004v1 |
2003-05-02 | Phase separation in coupled chaotic maps on fractal networks | The phase ordering dynamics of coupled chaotic maps on fractal networks are
investigated. The statistical properties of the systems are characterized by
means of the persistence probability of equivalent spin variables that define
the phases. The persistence saturates and phase domains freeze for all values
of the coup... | 0305004v1 |
2003-09-21 | Painlevé test of coupled Gross-Pitaevskii equations | Painlev\'{e} test of the coupled Gross-Pitaevskii equations has been carried
out with the result that the coupled equations pass the P-test only if a
special relation containing system parameters (masses, scattering lengths) is
satisfied. Computer algebra is applied to evaluate j=4 compatibility condition
for admissibl... | 0309056v1 |
2003-12-10 | Periodic orbit theory of two coupled Tchebyscheff maps | Coupled map lattices have been widely used as models in several fields of
physics, such as chaotic strings, turbulence, and phase transitions, as well as
in other disciplines, such as biology (ecology, evolution) and information
processing. This paper investigates properties of periodic orbits in two
coupled Tchebysche... | 0312024v1 |
2004-01-22 | Chaos synchronization in long-range coupled map lattices | We investigate the synchronization phenomenon in coupled chaotic map lattices
where the couplings decay with distance following a power-law. Depending on the
lattice size, the coupling strength and the range of the interactions, complete
chaos synchronization may be attained. The synchronization domain in parameter
spa... | 0401034v1 |
2004-07-19 | Chimera States for Coupled Oscillators | Arrays of identical oscillators can display a remarkable spatiotemporal
pattern in which phase-locked oscillators coexist with drifting ones.
Discovered two years ago, such "chimera states" are believed to be impossible
for locally or globally coupled systems; they are peculiar to the intermediate
case of nonlocal coup... | 0407045v1 |
2004-09-27 | Combination of anticipated and isochronous synchronization in coupled semiconductor lasers system | Combination of two basic types of synchronization, anticipated and
isochronous synchronization, is investigated numerically in coupled
semiconductor lasers. Due to the combination, a synchronization of good quality
can be obtained. We study the dependence of the lag time between two lasers and
the synchronization quali... | 0409056v1 |
2005-06-08 | Energy localization in two chaotically coupled systems | We set up and analyze a random matrix model to study energy localization and
its time behavior in two chaotically coupled systems. This investigation is
prompted by a recent experimental and theoretical study of Weaver and Lobkis on
coupled elastomechanical systems. Our random matrix model properly describes
the main f... | 0506017v1 |
2005-08-10 | Fractal Stationary Density in Coupled Maps | We study the invariant measure or the stationary density of a coupled
discrete dynamical system as a function of the coupling parameter \epsilon (0 <
\epsilon < 1/4). The dynamical system considered is chaotic and unsynchronized
for this range of parameter values. We find that the stationary density,
restricted on the ... | 0508017v1 |
2005-09-06 | On possibility of realization of the Mandelbrot set in coupled continuous systems | According to the method, suggested in our previous work (nlin/0509012) and
based on the consideration of the specially coupled systems, the possibility of
physical realization of the phenomena of complex analytic dynamics (such as
Mandelbrot and Julia sets) is discussed. It is shown, that unlike the case of
discrete ma... | 0509013v1 |
2005-10-03 | Synchronization by Reactive Coupling and Nonlinear Frequency Pulling | We present a detailed analysis of a model for the synchronization of
nonlinear oscillators due to reactive coupling and nonlinear frequency pulling.
We study the model for the mean field case of all-to-all coupling, deriving
results for the initial onset of synchronization as the coupling or
nonlinearity increase, and ... | 0510002v1 |
2005-10-04 | Synchronization of Coupled Chaotic Dynamics on Networks | We review some recent work on the synchronization of coupled dynamical
systems on a variety of networks. When nodes show synchronized behaviour, two
interesting phenomena can be observed. First, there are some nodes of the
floating type that show intermittent behaviour between getting attached to some
clusters and evol... | 0510008v1 |
2005-12-15 | Transitions To the Long-Resident State in coupled chaotic oscillators | The behaviors of coupled chaotic oscillators before complete synchronization
were investigated. We report three phenomena: (1) The emergence of long-time
residence of trajectories besides one of the saddle foci; (2) The tendency that
orbits of the two oscillators get close becomes faster with increasing the
coupling st... | 0512037v1 |
2006-12-05 | Random global coupling induces synchronization and nontrivial collective behavior in networks of chaotic maps | The phenomena of synchronization and nontrivial collective behavior are
studied in a model of coupled chaotic maps with random global coupling. The
mean field of the system is coupled to a fraction of elements randomly chosen
at any given time. It is shown that the reinjection of the mean field to a
fraction of randoml... | 0612010v1 |
2006-12-22 | Ring Intermittency in Coupled Chaotic Oscillators at the Boundary of Phase Synchronization | A new type of intermittent behavior is described to occur near the boundary
of phase synchronization regime of coupled chaotic oscillators. This mechanism,
called ring intermittency, arises for sufficiently high initial mismatches in
the frequencies of the two coupled systems. The laws for both the distribution
and the... | 0612049v1 |
1995-02-07 | THE COUPLING OF THE $f_1(1285)$ MESON TO THE ISOSCALAR AXIAL CURRENT OF THE NUCLEON | The weak decay as well as the strong nucleon coupling constants of the
isoscalar axial vector meson $f_1 (1285)$ are estimated within the octet quark
model. It is shown that the empirical value for the coupling of $\overline{s}s$
quarkonium to nucleons can be understood by attributing the $f_1(1285)$-nucleon
coupling t... | 9502018v1 |
1998-09-11 | Damping of giant resonances in asymmetric nuclear matter | The giant collective modes in asymmetric nuclear matter are investigated
within a dynamic relaxation time approximation. We derive a coupled dispersion
relation and show that two sources of coupling appear: (i) a coupling of
isoscalar and isovector modes due to different mean-fields acting and (ii) an
explicit new coup... | 9809035v1 |
1999-01-13 | About QCD sum rules for pion-nucleon coupling | We point out subtleties in the previous sum rule calculations of the $\pi NN$
coupling associated with using either the PV or the PS coupling schemes in
modeling the phenomenological side. We propose a sum rule which is independent
of the coupling schemes used and has less uncertainty in the OPE. The obtained
value is ... | 9901029v1 |
2000-06-30 | On a q-analogue of the spin-orbit coupling | Based on the tensor method, a q-analoque of the spin-orbit coupling is
introduced in a q-deformed Schroedinger equation, previously derived for a
central potential. Analytic expressions for the matrix elemnets of the
representation j=l\pm 1/2 are derived. The spectra of the harmonic oscillator
and the Coulomb potential... | 0006081v1 |
2003-09-15 | Coupled collective motion in nuclear reactions | In this paper, we review the roles of collective modes in nuclear reactions.
We emphaize the strong couplings of various collective states with the monopole
and quadrupole motions. In inelastic excitation, these couplings can be seen as
an important source of anharmonicity in the multiphonon spectrum. In fusion
reactio... | 0309036v1 |
2003-11-12 | Goldberger-Treiman constraint criteria for hyperon coupling constants | The generalized Goldberger-Treiman relation is combined with the
Dashen-Weinstein sum rule to provide a constraint equation between the
g(KSigmaN) and g(KLambdaN) coupling constants. A comprehensive examination of
the published phenomenological and theoretical hyperon couplings has yielded a
much smaller set of values,... | 0311039v2 |
2004-02-18 | Gamow and R-matrix Approach to Proton Emitting Nuclei | Proton emission from deformed nuclei is described within the non-adiabatic
weak coupling model which takes into account the coupling to
$\gamma$-vibrations around the axially-symmetric shape. The coupled equations
are derived within the Gamow state formalism. A new method, based on the
combination of the R-matrix theor... | 0402063v1 |
2004-06-05 | The dielectric function excited by $ρNN$ tensor coupling in nuclear matter | The dielectric function of nuclear matter excited by $\rho NN$ tensor
coupling has been studied in the framework of Finite temperature field theory.
The induced current mechanism has been introduced to explain the three extrema
on the dielectric function curve, of which one is in the space-like region and
the other two... | 0406014v1 |
2005-06-14 | Random-phase approximation based on relativistic point-coupling models | The matrix equations of the random-phase approximation (RPA) are derived for
the point-coupling Lagrangian of the relativistic mean-field (RMF) model. Fully
consistent RMF plus (quasiparticle) RPA illustrative calculations of the
isoscalar monopole, isovector dipole and isoscalar quadrupole response of
spherical medium... | 0506043v1 |
2006-03-23 | Scalar-Meson - Baryon Coupling Constants in QCD Sum Rules | The external-field QCD Sum Rules method is used to evaluate the coupling
constants of the light-isoscalar scalar meson (``\sigma'' or \epsilon) to the
\Lambda, \Sigma, and \Xi baryons. It is shown that these coupling constants as
calculated from QCD Sum Rules are consistent with SU(3)-flavor relations, which
leads to a... | 0603058v1 |
2007-03-28 | The Friedrichs-Model with fermion-boson couplings II | In this work we present a formal solution of the extended version of the
Friedrichs Model. The Hamiltonian consists of discrete and continuum bosonic
states, which are coupled to fermions. The simultaneous treatment of the
couplings of the fermions with the discrete and continuous sectors of the
bosonic degrees of free... | 0703091v1 |
1998-05-23 | Optical microsphere resonators: optimal coupling to high-Q whispering gallery modes | A general model is presented for coupling of high-$Q$ whispering-gallery
modes in optical microsphere resonators with coupler devices possessing
discrete and continuous spectrum of propagating modes. By contrast to
conventional high-Q optical cavities, in microspheres independence of high
intrinsic quality-factor and c... | 9805030v1 |
2004-05-03 | On the role of coupling in mode selective excitation using ultrafast pulse shaping in stimulated Raman spectroscopy | The coherence of two, coupled two-level systems, representing vibrational
modes in a semiclassical model, is calculated in weak and strong fields for
various coupling schemes and for different relative phases between initial
state amplitudes. A relative phase equal to $\pi$ projects the system into a
dark state. The se... | 0405011v1 |
2004-05-13 | The program for the transformation of atomic state functions from LS- to jj-coupled basis | Here we present the program for the transformation of the expansions of the
atomic state functions from LS- to jj-coupled bases. The program is a part of
the coupling optimization package Laris and allows to transform the
multiconfigurational expansions with the arbitrary number of open shells
(including f-electrons) a... | 0405061v1 |
2005-05-09 | Bistable light detectors with nonlinear waveguide arrays | Bistability induced by nonlinear Kerr effect in arrays of coupled waveguides
is studied and shown to be a means to conceive light detectors that switch
under excitation by a weak signal. The detector is obtained by coupling two
single 1D waveguide to an array of coupled waveguides with adjusted indices and
coupling. Th... | 0505062v2 |
2005-06-08 | Fluorescence measurements of expanding strongly-coupled neutral plasmas | We report new detailed density profile measurements in expanding
strongly-coupled neutral plasmas. Using laser-induced fluorescence techniques,
we determine plasma densities in the range of 10^5 to 10^9/cm^3 with a time
resolution limit as small as 7 ns. Strong-coupling in the plasma ions is
inferred directly from the ... | 0506069v2 |
2006-03-13 | Mode coupling control in a resonant device: application to solid-state ring lasers | A theoretical and experimental investigation of the effects of mode coupling
in a resonant macro- scopic quantum device is achieved in the case of a ring
laser. In particular, we show both analytically and experimentally that such a
device can be used as a rotation sensor provided the effects of mode coupling
are contr... | 0603099v1 |
2002-09-14 | Saturation of the production of quantum entanglement between weakly coupled mapping systems in strongly chaotic region | The production of quantum entanglement between weakly coupled mapping
systems, whose classical counterparts are both strongly chaotic, is
investigated. In the weak coupling regime, it is shown that time correlation
functions of the unperturbed systems determine the entanglement production. In
particular, we elucidate t... | 0209086v1 |
2003-01-18 | Geometric Phase of electrons due to the Spin-rotation Coupling in Rotating C$_{60}$ Molecules | The rapidly rotational motion of C$_{60}$ molecules provides us with an
ingenious way to test Mashhoon's spin-rotation coupling. The spin-rotation
coupling of electrons in the rotating C$_{60}$ molecule is considered in the
present letter. It is shown that the intrinsic spin (gravitomagnetic moment) of
the electron tha... | 0301094v3 |
2003-04-28 | Quantum information processing using Josephson junctions coupled through cavities | Josephson junctions have been shown to be a promising solid-state system for
implementation of quantum computation. The significant two-qubit gates are
generally realized by the capacitive coupling between the nearest neighbour
qubits. We propose an effective Hamiltonian to describe charge qubits coupled
through the ca... | 0304173v2 |
2003-09-11 | Anticrossings in Foerster Coupled Quantum Dots | We consider two coupled generic quantum dots, each modelled by a simple
potential which allows the derivation of an analytical expression for the
inter-dot Foerster coupling, in the dipole-dipole approximation. We investigate
the energy level behaviour of this coupled two-dot system under the influence
of an external a... | 0309099v2 |
2003-11-20 | Entanglement generated between a single atom and a laser pulse | We quantify the entanglement generated between an atom and a laser pulse in
free space. We find that the entanglement calculated using a simple
closed-system Jaynes-Cummings Hamiltonian is in remarkable agreement with a
full open-system calculation, even though the free-space geometry is far from
the strong coupling re... | 0311135v1 |
2005-02-22 | Minimal coupling method and the dissipative scalar field theory | Quantum field theory of a damped vibrating string as the simplest dissipative
scalar field investigated by its coupling with an infinit number of
Klein-Gordon fields as the environment by introducing a minimal coupling
method. Heisenberg equation containing a dissipative term proportional to
velocity obtained for a spe... | 0502134v2 |
2005-02-25 | Time Optimal Control of Coupled Qubits Under Non-Stationary Interactions | In this article, we give a complete characterization of all the unitary
transformations that can be synthesized in a given time for a system of coupled
spin-1/2 in presence of general time varying coupling tensor. Our treatment is
quite general and our results help to characterize the reachable set at all
times for a c... | 0502173v2 |
2005-09-22 | Exact solution of quantum dynamics of a cantilever coupling to a single trapped ultracold ion | The quantum behavior of a precooled cantilever can be probed highly
efficiently by coupling to a trapped ultracold ion, in which a fast cooling of
the cantilever down to the ground vibrational state is possible. We solve the
dynamics of the coupling system by a squeezed-state expansion technique, and
can in principle o... | 0509160v2 |
2005-10-11 | Weak and strong coupling regimes, vacuum Rabi splitting and nonstandard resonances | For two discrete-level quantum systems in interaction, we follow the
displacement in the complex plane of the eigen-energies of the compound system
when the spectrum of one of the two systems becomes continuous. These new
points are usually called resonances. This allows us to define and to calculate
a critical value o... | 0510075v1 |
2006-03-28 | Ultrafast Coherent Coupling of Atomic Hyperfine and Photon Frequency Qubits | We demonstrate ultrafast coherent coupling between an atomic qubit stored in
a single trapped cadmium ion and a photonic qubit represented by two resolved
frequencies of a photon. Such ultrafast coupling is crucial for entangling
networks of remotely-located trapped ions through photon interference, and is
also a key c... | 0603258v2 |
1997-01-31 | Coupled Nonlinear Schrödinger equation and Toda equation (the Root of Integrability) | We consider the relation between the discrete coupled nonlinear
Schr\"{o}dinger equation and Toda equation. Introducing complex times we can
show the intergability of the discrete coupled nonlinear Schr\"{o}dinger
equation. In the same way we can show the integrability in coupled case of dark
and bright equations. Usin... | 9701022v2 |
1998-05-02 | Analytical Study of the Julia Set of a Coupled Generalized Logistic Map | A coupled system of two generalized logistic maps is studied. In particular
influence of the coupling to the behaviour of the Julia set in two dimensional
complex space is analyzed both analytically and numerically. It is proved
analytically that the Julia set disappears from the complex plane uniformly as
a parameter ... | 9805001v2 |
1999-07-02 | New Integrable Coupled Nonlinear Schrodinger Equations | Two types of integrable coupled nonlinear Schrodinger (NLS) equations are
derived by using Zakharov-Shabat (ZS) dressing method.The Lax pairs for the
coupled NLS equations are also investigated using the ZS dressing method. These
give new types of the integrable coupled NLS equations with certain additional
terms. Then... | 9907007v1 |
1995-07-07 | Low-Field Phase Diagram of Layered Superconductors: The Role of Electromagnetic Coupling | We determine the position and shape of the melting line in a layered
superconductor taking the electromagnetic coupling between layers into account.
In the limit of vanishing Josephson coupling we obtain a new generic reentrant
low-field melting line. Finite Josephson coupling pushes the melting line to
higher temperat... | 9507003v2 |
2007-04-21 | Strong coupling limit/region of lattice QCD | We study the phase diagram of quark matter and nuclear properties based on
the strong coupling expansion of lattice QCD. Both of baryon and finite
coupling correction are found to have effects to extend the hadron phase to a
larger mu direction relative to Tc. In a chiral RMF model with logarithmic
sigma potential deri... | 0704.2823v1 |
2007-04-26 | Coupling of phonons and spin waves in triangular antiferromagnet | We investigate the influence of the spin-phonon coupling in the triangular
antiferromagnet where the coupling is of the exchange-striction type. The
magnon dispersion is shown to be modified significantly at wave vector (2pi,0)
and its symmetry-related points, exhibiting a roton-like minimum and an
eventual instability... | 0704.3510v2 |
2007-04-29 | Effect of Decoherence on the Dynamics of Bose-Einstein Condensates in a Double-well Potential | We study the dynamics of a Bose-Einstein condensate in a double-well
potential in the mean-field approximation. Decoherence effects are considered
by analyzing the couplings of the condensate to environments. Two kinds of
coupling are taken into account. With the first kind of coupling dominated, the
decoherence can en... | 0704.3823v1 |
2007-05-03 | Leader-following coordination of multi-agent systems with coupling time delays | In this paper, we consider a leader-following consensus problem of a group of
autonomous agents with time-varying coupling delays. Two different cases of
coupling topologies are investigated. At first, a necessary and sufficient
condition is proved in the case when the interconnection topology is fixed and
directed. Th... | 0705.0401v1 |
2007-05-28 | $WZ$ Production at $eγ$ Colliders and Anomalous Quartic $WWZγ$ Coupling | We investigate the constraints on the anomalous quartic $W^{+}W^{-}Z\gamma$
gauge boson coupling through the process $e^{-}\gamma\to \nu_{e}W^{-}Z$.
Considering incoming beam polarizations and the longitudinal and transverse
polarization states of the final W and Z boson we find 95% confidence level
limits on the anoma... | 0705.4075v2 |
2007-06-08 | Analytical calculation of the transition to complete phase synchronization in coupled oscillators | Here we present a system of coupled phase oscillators with nearest neighbors
coupling, which we study for different boundary conditions. We concentrate at
the transition to total synchronization. We are able to develop exact solutions
for the value of the coupling parameter when the system becomes completely
synchroniz... | 0706.1250v2 |
2007-07-04 | Input-output relations for a 3-port grating coupled Fabry-Perot cavity | We analyze an optical 3-port reflection grating by means of a scattering
matrix formalism. Amplitude and phase relations between the 3 ports, i.e. the 3
orders of diffraction are derived. Such a grating can be used as an
all-reflective, low-loss coupler to Fabry-Perot cavities. We derive the input
output relations of a... | 0707.0625v1 |
2007-07-08 | A Renormalization Group For Treating 2D Coupled Arrays of Continuum 1D Systems | We study the spectrum of two dimensional coupled arrays of continuum
one-dimensional systems by wedding a density matrix renormalization group
procedure to a renormalization group improved truncated spectrum approach. To
illustrate the approach we study the spectrum of large arrays of coupled
quantum Ising chains. We d... | 0707.1160v1 |
2007-07-20 | Stress Tensor of Static Dipoles in strongly coupled $\cal{N}$=4 Gauge Theory | In the context of the AdS/CFT correspondence we calculate the induced stress
tensor of static dipoles (electric-electric and electric-magnetic) in a
strongly coupled ${\cal N}=4$ SYM gauge theory, by solving the linearized
Einstein equation with Maldecena string as a source. Analytic expressions are
given for the far-f... | 0707.3135v2 |
2007-07-25 | Self-Dual Yang-Mills Multiplet in Three Dimensions Coupled to Supergravity | We couple a recently-established N=1 globally supersymmetric self-dual
Yang-Mills multiplet in three dimensions to supergravity. This becomes possible
due to our previous result on globally supersymmetric formulation based on a
compensator multiplet. We further couple the self-dual vector to a
supersymmetric sigma-mode... | 0707.3653v1 |
2007-07-30 | Bulk-edge coupling in the non-abelian $ν=5/2$ quantum Hall interferometer | Recent schemes for experimentally probing non-abelian statistics in the
quantum Hall effect are based on geometries where current-carrying
quasiparticles flow along edges that encircle bulk quasiparticles, which are
localized. Here we consider one such scheme, the Fabry-Perot interferometer,
and analyze how its interfe... | 0707.4474v1 |
2007-08-07 | Enhance synchronizability via age-based coupling | In this brief report, we study the synchronization of growing scale-free
networks. An asymmetrical age-based coupling method is proposed with only one
free parameter $\alpha$. Although the coupling matrix is asymmetric, our
coupling method could guarantee that all the eigenvalues are non-negative
reals. The eigneratio ... | 0708.0863v1 |
2007-08-27 | Asymptotics of QCD traveling waves with fluctuations and running coupling effects | Extending independently the Balitsky-Kovchegov (BK) equation to running
coupling or to fluctuation effects due to Pomeron loops is known to lead in
both cases to qualitative changes of the traveling-wave asymptotic solutions.
In this paper we study the extension of the forward BK equation, including both
running coupli... | 0708.3659v3 |
2007-09-04 | Polarized Single Top Quark Production in eγCollision and Anomalous Wtb Couplings | We investigate the potential of $e\gamma$ collisions to probe anomalous $Wtb$
couplings via the polarized single top quark production process $e^{+} \gamma
\to t \bar{b} \bar{\nu_{e}}$. We find 95% confidence level limits on the
anomalous coupling parameters $F_{2L}$ and $F_{2R}$ with an integrated
luminosity of $500 f... | 0709.0365v2 |
2007-09-07 | The Adiabatic Instability on Cosmology's Dark Side | We consider theories with a nontrivial coupling between the matter and dark
energy sectors. We describe a small scale instability that can occur in such
models when the coupling is strong compared to gravity, generalizing and
correcting earlier treatments. The instability is characterized by a negative
sound speed squa... | 0709.1124v1 |
2007-09-26 | Nonperturbative Instability of AdS_5 x S^5/Z_k | We study the AdS/CFT correspondence with boundary conditions AdS_5 x S^5/Z_k,
where the Z_k acts freely but breaks all supersymmetry. While there are closed
string tachyons at small 't Hooft coupling, there are no tachyons at large
coupling. Nevertheless, we show that there is a nonperturbative instability
directly ana... | 0709.4262v2 |
2007-09-29 | Coupled nanopillar waveguides: optical properties and applications | In this paper we review basic properties of coupled periodic and aperiodic
nanopillar waveguides. A coupled nanopillar waveguide consists of several rows
of periodically or aperiodically placed dielectric rods (pillars). In such a
waveguide, light confinement is due to the total internal reflection, while
guided modes ... | 0710.0054v1 |
2007-09-29 | Elliptic functions and efficient control of Ising spin chains with unequal couplings | In this article, we study optimal control of dynamics in a linear chain of
three spin 1/2, weakly coupled with unequal Ising couplings. We address the
problem of time-optimal synthesis of multiple spin quantum coherences. We
derive time-optimal pulse sequence for creating a desired spin order by
computing geodesics on ... | 0710.0075v1 |
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