publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2003-09-22 | Fast two-bit operations in inductively coupled flux qubits | A central problem for implementing efficient quantum computing is how to
realize fast operations (both one- and two-bit ones). However, this is
difficult to achieve for a collection of qubits, especially for those separated
far away, because the interbit coupling is usually much weaker than the
intrabit coupling. Here ... | 0309491v3 |
2004-01-12 | The Effects of the interfacial Pseudo-spin Coupling Fluctuation on the Dielectric Property of a Ferroelectric Superlattice | Using effective-field theory with correlations, we investigate the effects of
interfacial pseudo-spin coupling fluctuations on the susceptibility and
polarization of ferroelectric superlattices within the framework of transverse
Ising model. It is found that the interfacial coupling fluctuations increase
the susceptibi... | 0401168v3 |
2004-08-26 | Collective synchronization in spatially extended systems of coupled oscillators with random frequencies | We study collective behavior of locally coupled limit-cycle oscillators with
random intrinsic frequencies, spatially extended over $d$-dimensional
hypercubic lattices. Phase synchronization as well as frequency entrainment are
explored analytically in the linear (strong-coupling) regime and numerically in
the nonlinear... | 0408553v1 |
2004-10-11 | Dispersion of incoherent spectral features in systems with strong electron-phonon coupling | We study (inverse) photoemission from systems with strong coupling of doped
carriers to phonons. Using an adiabatic approximation, we develop a method for
calculating spectra. This method is particularly simple for systems where the
electron-phonon coupling can be neglected in the initial state, e.g., the
undoped t-J m... | 0410247v1 |
2005-01-05 | Direct Josephson coupling between superconducting flux qubits | We have demonstrated strong antiferromagnetic coupling between two
three-junction flux qubits based on a shared Josephson junction, and therefore
not limited by the small inductances of the qubit loops. The coupling sign and
magnitude were measured by coupling the system to a high-quality
superconducting tank circuit. ... | 0501085v2 |
2005-03-23 | Indirect exchange coupling between magnetic adatoms in carbon nanotubes | The long range character of the exchange coupling between localized magnetic
moments indirectly mediated by the conduction electrons of metallic hosts can
play a significant role in determining the magnetic order of low-dimensional
structures. Here we consider how this indirect coupling influences the magnetic
alignmen... | 0503589v1 |
2005-05-23 | Synchronizations in small-world networks of spiking neurons: Diffusive versus sigmoid couplings | By using a semi-analytical dynamical mean-field approximation previously
proposed by the author [H. Hasegawa, Phys. Rev. E, {\bf 70}, 066107 (2004)], we
have studied the synchronization of stochastic, small-world (SW) networks of
FitzHugh-Nagumo neurons with diffusive couplings. The difference and similarity
between re... | 0505543v3 |
2005-12-28 | Decoherence dynamics of a qubit coupled to a quantum two-level system | We study the decoherence dynamics of a qubit coupled to a quantum two-level
system (TLS) in addition to its weak coupling to a background environment. We
analyze the different regimes of behaviour that arise as the values of the
different parameters are varied. We classify those regimes as two weak-coupling
regimes, wh... | 0512677v3 |
2006-01-17 | Spin Hot Spots in vertically-coupled Few-electron Quantum Dots | The effects of spin-orbit (SO) coupling arising from the confinement
potential in single and two vertically-coupled quantum dots have been
investigated. Our work indicates that a dot containing a single electron shows
the lifting of the degeneracy of dipole-allowed transitions at B=0 due to the
SO coupling which disapp... | 0601390v1 |
2006-04-25 | Public-channel cryptography based on mutual chaos pass filters | We study the mutual coupling of chaotic lasers and observe both
experimentally and in numeric simulations, that there exists a regime of
parameters for which two mutually coupled chaotic lasers establish isochronal
synchronization, while a third laser coupled unidirectionally to one of the
pair, does not synchronize. W... | 0604569v1 |
2006-11-19 | Magnetic coupling in CoCr_2O_4 and MnCr_2O_4: an LSDA+U study | We present a first principles LSDA+U study of the magnetic coupling constants
in the spinel magnets CoCr_2O_4 and MnCr_2O_4. Our calculated coupling
constants highlight the possible importance of AA interactions in spinel
systems with magnetic ions on both A and B sites. Furthermore, we show that a
careful analysis of ... | 0611502v3 |
2006-06-26 | Coupled quintessence and curvature-assisted acceleration | Spatially homogeneous models with a scalar field non-minimally coupled to the
space-time curvature or to the ordinary matter content are analysed with
respect to late-time asymptotic behaviour, in particular to accelerated
expansion and isotropization. It is found that a direct coupling to the
curvature leads to asympt... | 0606113v2 |
2001-04-18 | Measurement of Triple Gauge-Boson Couplings at LEP up to 189GeV | The triple gauge-boson couplings involving the W are determined using data
samples collected with the ALEPH detector at mean centre-of-mass energies of
183 GeV and 189 GeV, corresponding to integrated luminosities of 57 pb^-1 and
174 pb^-1, respectively. The couplings, g^Z_1, Kappa_gamma and lambda_gamma,
are measured ... | 0104034v1 |
2003-08-27 | Measurement of charged current triple gauge boson couplings using W pairs at LEP | Triple gauge boson couplings are measured from W-pair and single photon
events recorded by the OPAL detector at LEP at center-of-mass energies between
183 - 209 GeV with a total integrated luminosity of 680 inverse picobarns. Only
CP-conserving couplings are considered and SU(2)xU(1) relations between the WWZ
and the W... | 0308067v1 |
2005-11-20 | Running couplings in equivariantly gauge-fixed SU(N) Yang--Mills theories | In equivariantly gauge-fixed SU(N) Yang--Mills theories, the gauge symmetry
is only partially fixed, leaving a subgroup $H\subset SU(N)$ unfixed. Such
theories avoid Neuberger's nogo theorem if the subgroup $H$ contains at least
the Cartan subgroup $U(1)^{N-1}$, and they are thus non-perturbatively well
defined if regu... | 0511042v1 |
1993-12-07 | How Big Can Anomalous W Couplings Be? | Conventional wisdom has it that anomalous gauge-boson self-couplings can be
at most a percent or so in size. We test this wisdom by computing these
couplings at one loop in a generic renormalizable model of new physics. (For
technical reasons we consider the CP-violating couplings here, but our results
apply more gener... | 9312238v2 |
1994-02-18 | Effects of technicolor on standard model running couplings | We discuss the running couplings in the standard model, SU(3$)_C \times
$SU(2$)_L \times $U(1$)_Y$, when the Higgs sector is replaced by SU($N_{TC})$
technicolor. Particular attention is given to the running of the couplings at
momentum scales where technicolor is nonperturbative, and in this region we
apply a relativi... | 9402319v1 |
1997-07-25 | Strong Unification | We investigate the possibility that unification occurs at strong coupling. We
show that, despite the fact the couplings pass through a strong coupling
regime, accurate predictions for their low energy values are possible because
the couplings of the theory flow to infrared fixed points. We determine the
low-energy QCD ... | 9707462v2 |
1999-02-19 | Infra-red stable fixed points of R-parity violating Yukawa couplings in supersymmetric models | We investigate the infra-red stable fixed points of the Yukawa couplings in
the minimal version of the supersymmetric standard model with R-parity
violation. Retaining only the R-parity violating couplings of higher
generations, we analytically study the solutions of the renormalization group
equations of these couplin... | 9902405v3 |
1999-06-10 | Gauge Coupling Unification with Extra Dimensions and Gravitational Scale Effects | We study gauge coupling unification in the presence of extra dimensions
compactified at a few TeV. Achieving unification requires a large number of
gauge boson Kaluza-Klein excitations lighter than the string scale, such that
the higher-dimensional gauge couplings are O(1) in string scale units.
Corrections to the gaug... | 9906327v2 |
1999-10-04 | Preheating of the nonminimally coupled inflaton field | We investigate preheating of an inflaton field $\phi$ coupled nonminimally to
a spacetime curvature. In the case of a self-coupling inflaton potential
$V(\phi)=\lambda \phi^4/4$, the dynamics of preheating changes by the effect of
the negative $\xi$. We find that the nonminimal coupling works in two ways.
First, sinc... | 9910214v2 |
2000-04-27 | Higgs sector and R-parity breaking couplings in models with broken U(1)_B-L gauge symmetry | Four different supersymmetric models based on SU(2)_L X U(1)_R X U(1)_B-L and
SU(2)_L X SU(2)_R X U(1)_B-L gauge symmetry groups are studied. U(1)_B-L
symmetry is broken spontaneously by a vacuum expectation value (VEV) of a
sneutrino field. The right-handed gauge bosons may obtain their mass solely by
sneutrino VEV. T... | 0004239v1 |
2000-11-22 | Infrared Fixed Point Structure in Minimal Supersymmetric Standard Model with Baryon and Lepton Number Violation | We study in detail the renomalization group evolution of Yukawa couplings and
soft supersymmetry breaking trilinear couplings in the minimal supersymmetric
standard model with baryon and lepton number violation. We obtain the exact
solutions of these equations in a closed form, and then depict the infrared
fixed point ... | 0011274v2 |
2001-02-10 | New analytic running coupling in spacelike and timelike regions | The new model for the QCD analytic running coupling, proposed recently, is
extended to the timelike region. This running coupling naturally arises under
unification of the analytic approach to QCD and the renormalization group (RG)
formalism. A new method for determining the coefficients of the "analytized" RG
equation... | 0102124v2 |
2003-06-25 | Probing triple gauge couplings with transverse beam polarisation in e+e- -> W+W- | The prospects of measuring triple gauge couplings in W pair production at
future linear colliders with transverse beam polarisation are studied. We
consider CP conserving and CP violating couplings with both real and imaginary
parts. The maximum achievable sensitivity in a simultaneous measurement of all
couplings is d... | 0306247v2 |
2004-06-29 | Extracting Higgs boson couplings from LHC data | We show how LHC Higgs boson production and decay data can be used to extract
gauge and fermion couplings of Higgs bosons. We show that very mild theoretical
assumptions, which are valid in general multi-Higgs doublet models, are
sufficient to allow the extraction of absolute values for the couplings rather
than just ra... | 0406323v1 |
2005-12-24 | Pseudoscalar Photon Mixing In A Magnetized Medium | Axions are pseudo-scalar particles, those arise because of breaking of Peccei
Queen (PQ) symmetry. Axions have a tree level coupling to two photons. As a
consequence there exists a tree level coupling of axion to photon in a magnetic
field. However, in an external magnetic field, there exists a new loop induced,
axion ... | 0512323v1 |
2007-01-17 | Implications of Canonical Gauge Coupling Unification in High-Scale Supersymmetry Breaking | We systematically construct two kinds of models with canonical gauge coupling
unification and universal high-scale supersymmetry breaking. In the first we
introduce standard vector-like particles while in the second we also include
non-standard vector-like particles. We require that the gauge coupling
unification scale... | 0701136v1 |
2007-03-19 | Anomalous Quartic $WWγγ$ and $ZZγγ$ Couplings in $eγ$ Collision With Initial Beams and Final State Polarizations | The constraints on the anomalous quartic $WW\gamma\gamma$ and
$ZZ\gamma\gamma$ gauge boson couplings are investigated through the processes
$e\gamma\to W^{-}\gamma\nu_{e}$ and $e\gamma\to Z\gamma e$. Considering the
longitudinal and transverse polarization states of the final W or Z boson and
incoming beam polarization... | 0703201v1 |
2001-09-13 | Non-minimal coupling for spin 3/2 fields | The problem of the electromagnetic coupling for spin 3/2 fields is discussed.
Following supergravity and some recent works in the field of classical
supersymmetric particles, we find that the electromagnetic coupling must not
obey a minimal coupling in the sense that one needs to consider not only the
electromagnetic p... | 0109104v1 |
2003-02-14 | Yukawa couplings in intersecting D-brane models | We compute the Yukawa couplings among chiral fields in toroidal Type II
compactifications with wrapping D6-branes intersecting at angles. Those models
can yield realistic standard model spectrum living at the intersections. The
Yukawa couplings depend both on the Kahler and open string moduli but not on
the complex str... | 0302105v2 |
2005-04-04 | Flavor structure and coupling selection rule from intersecting D-branes | We study flavor structure and the coupling selection rule in intersecting
D-brane configurations. We formulate the selection rule for Yukawa couplings
and its extensions to generic n-point couplings. We investigate the possible
flavor structure, which can appear from intersecting D-brane configuration, and
it is found ... | 0504019v1 |
2007-03-26 | Gravitating Monopole-Antimonopole Systems at Large Scalar Coupling | We discuss static axially symmetric solutions of SU(2)
Einstein-Yang-Mills-Higgs theory for large scalar coupling. These regular
asymptotically flat solutions represent monopole-antimonopole chain and vortex
ring solutions, as well as new configurations, present only for larger values
of the scalar coupling. When gravi... | 0703232v1 |
2004-08-10 | Ergodic Dynamics of the Coupled Quasigeostrophic Flow-Energy Balance System | The authors consider a mathematical model for the coupled atmosphere-ocean
system, namely, the coupled quasigeostrophic flow-energy balance model. This
model consists of the large scale quasigeostrophic oceanic flow model and the
transport equation for oceanic temperature, coupled with an atmospheric energy
balance mod... | 0408135v1 |
2005-11-23 | Discrete vector on-site vortices | We study discrete vortices in coupled discrete nonlinear Schrodinger
equations. We focus on the vortex cross configuration that has been
experimentally observed in photorefractive crystals. Stability of the
single-component vortex cross in the anti-continuum limit of small coupling
between lattice nodes is proved. In t... | 0511586v1 |
2006-11-21 | Metastability in Interacting Nonlinear Stochastic Differential Equations I: From Weak Coupling to Synchronisation | We consider the dynamics of a periodic chain of N coupled overdamped
particles under the influence of noise. Each particle is subjected to a
bistable local potential, to a linear coupling with its nearest neighbours, and
to an independent source of white noise. We show that as the coupling strength
increases, the numbe... | 0611647v2 |
2003-07-22 | Synchronized clusters in coupled map networks: Stability analysis | We study self-organized (s-) and driven (d-) synchronization in coupled map
networks for some simple networks, namely two and three node networks and their
natural generalization to globally coupled and complete bipartite networks. We
use both linear stability analysis and Lyapunov function approach for this
study and ... | 0307037v1 |
2006-08-09 | Delayed-mutual coupling dynamics of lasers: scaling laws and resonances | We consider a model for two lasers that are mutually coupled
optoelectronically by modulating the pump of one laser with the intensity
deviations of the other. Signal propagation time in the optoelectronic loop
causes a significant delay leading to the onset of oscillatory output.
Multiscale perturbation methods are us... | 0608015v1 |
1999-04-18 | $πNN$ coupling determined beyond the chiral limit | Within the conventional QCD sum rules, we calculate the $\pi NN$ coupling
constant, $g_{\pi N}$, beyond the chiral limit using two-point correlation
function with a pion. We consider the Dirac structure, $i\gamma_5$, at
$m_\pi^2$ order, which has clear dependence on the PS and PV coupling schemes
for the pion-nucleon i... | 9904049v2 |
2001-09-21 | An Analysis of the $^{12}$C+$^{24}$Mg Reaction Using A New Coupling Potential | We introduce a new coupling potential to explain the experimental data for
the $^{12}$C+$^{24}$Mg system at numerous energies in the laboratory system
from 16.0 MeV to 24.0 MeV. This new coupled-channels based approach involves
replacing the usual first derivative coupling potential by a new,
second-derivative coupling... | 0109064v1 |
2000-12-06 | Perturbative treatment of intercenter coupling in Redfield theory | The quantum dynamics of coupled subsystems connected to a thermal bath is
studied. In some of the earlier work the effect of intercenter coupling on the
dissipative part was neglected. This is equivalent to a zeroth-order
perturbative expansion of the damping term with respect to the intercenter
coupling. It is shown n... | 0012012v1 |
2005-04-14 | Coupling into the slow light mode in slab-type photonic crystal waveguides | Coupling of external light signals into a photonic crystal waveguide becomes
increasingly inefficient as the group velocity of the waveguiding mode slows
down. We have systematically studied the efficiency of coupling in the slow
light regime for samples with different truncations of the photonic lattice at
the couplin... | 0504102v4 |
2003-07-18 | Entanglement production in coupled chaotic systems : Case of the Kicked Tops | Entanglement production in coupled chaotic systems is studied with the help
of kicked tops. Deriving the correct classical map, we have used the reduced
Husimi function, the Husimi function of the reduced density matrix, to
visualize the possible behaviors of a wavepacket. We have studied a phase space
based measure of... | 0307134v2 |
2007-09-05 | Strain dependent twist-stretch elasticity in chiral filaments | Coupling between axial and torsional degrees of freedom often modifies the
conformation and expression of natural and synthetic filamentous aggregates.
Recent studies on chiral single-walled carbon nanotubes and B-DNA reveal a
reversal in the sign of the twist-stretch coupling at large strains. The
similarity in the re... | 0709.0558v1 |
2007-10-09 | Direct Detection of Non-Chiral Dark Matter | Direct detection experiments rule out fermion dark matter that is a chiral
representation of the electroweak gauge group. Non-chiral real, complex and
singlet representations, however, provide viable fermion dark matter
candidates. Although any one of these candidates will be virtually impossible
to detect at the LHC, ... | 0710.1668v2 |
2008-04-05 | Analytic QCD - a short review | Analytic versions of QCD are those whose coupling alpha_s(Q^2) does not have
the unphysical Landau singularities on the space-like axis (-q^2=Q^2 > 0). The
coupling is analytic in the entire complex plane except the time-like axis (Q^2
< 0). Such couplings are thus suitable for application of perturbative methods
down ... | 0804.0872v2 |
2008-10-01 | Magnetic Order Beyond RKKY in the Classical Kondo Lattice | We study the Kondo lattice model of band electrons coupled to classical
spins, in three dimensions, using a combination of variational calculation and
Monte Carlo. We use the weak coupling `RKKY' window and the strong coupling
regime as benchmarks, but focus on the physically relevant intermediate
coupling regime. Even... | 0810.0140v2 |
2008-11-22 | Synchronization of coupled demographic oscillators | Demographic oscillators are individual-based systems exhibiting temporal
cycles sustained by the stochastic dynamics of the microscopic interacting
particles. We here use the example of coupled predator-prey oscillators to show
that synchronization to a common frequency can occur between two such systems,
even if they ... | 0811.3689v1 |
2009-03-06 | Universality of the Nf=2 Running Coupling | We investigate universality of the Nf=2 running coupling in the Sch\"odinger
functional scheme, by calculating the step scaling function in lattice QCD with
the renorm alization group (RG) improved gauge action at both weak(u=0.9796)
and strong(u=3.3340) couplings, where u=\bar{g}^2_SF with \bar{g}_SF being the
running... | 0903.1154v1 |
2009-03-20 | Semi-passivity and synchronization of diffusively coupled neuronal oscillators | We discuss synchronization in networks of neuronal oscillators which are
interconnected via diffusive coupling, i.e. linearly coupled via gap junctions.
In particular, we present sufficient conditions for synchronization in these
networks using the theory of semi-passive and passive systems. We show that the
conductanc... | 0903.3535v1 |
2009-03-26 | Quantum Localization for Two Coupled Kicked Rotors | We study a system of two coupled kicked rotors, both classically and quantum
mechanically, for a wide range of coupling parameters. This was motivated by
two published reports, one of which reported quantum localization, while the
other reported diffusion. The classical systems are chaotic, and exhibit normal
diffusive... | 0903.4632v2 |
2009-04-08 | The exchange fluctuation theorem in quantum mechanics | We study the heat transfer between two finite quantum systems initially at
different temperatures. We find that a recently proposed fluctuation theorem
for heat exchange, namely the exchange fluctuation theorem [C. Jarzynski and D.
K. Wojcik, Phys. Rev. Lett. 92, 230602 (2004)], does not generally hold in the
presence ... | 0904.1443v1 |
2009-04-15 | Soliton Dynamics in Linearly Coupled Discrete Nonlinear Schrödinger Equations | We study soliton dynamics in a system of two linearly coupled discrete
nonlinear Schr\"odinger equations, which describe the dynamics of a
two-component Bose gas, coupled by an electromagnetic field, and confined in a
strong optical lattice. When the nonlinear coupling strengths are equal, we use
a unitary transformati... | 0904.2415v1 |
2009-07-30 | The strong-coupling limit of a Kondo spin coupled to a mesoscopic quantum dot: effective Hamiltonian in the presence of exchange correlations | We consider a Kondo spin that is coupled antiferromagnetically to a large
chaotic quantum dot. Such a dot is described by the so-called universal
Hamiltonian and its electrons are interacting via a ferromagnetic exchange
interaction. We derive an effective Hamiltonian in the limit of strong Kondo
coupling, where the sc... | 0907.5297v1 |
2009-08-14 | Probing scalar particle and unparticle couplings in e+ e- -> t tbar with transversely polarized beams | In searching for indications of new physics scalar particle and unparticle
couplings in e^+ e^- \to t\bar t, we consider the role of transversely
polarized initial beams at e^+ e^- colliders. By using a general relativistic
spin density matrix formalism for describing the particles spin states, we find
analytical expre... | 0908.2027v2 |
2009-09-11 | Couplings between dipole and quadrupole vibrations in tin isotopes | We study the couplings between collective vibrations such as the isovector
giant dipole and isoscalar giant quadrupole resonances in tin isotopes in the
framework of the time-dependent Hartree-Fock theory with a Skyrme energy
density functional. These couplings are a source of anharmonicity in the
multiphonon spectrum.... | 0909.2092v2 |
2009-09-13 | Formation of Intermediate Coupling Optical Polarons and Bipolarons in Two-Dimensional Systems | he formation of the optical polaron and bipolaron in two-dimensional (2D)
systems are studied in the intermediate electron-phonon coupling regime. The
total energies of 2D polaron and bipolaron are calculated by using the
Buimistrov-Pekar method of canonical transformations and analyzed in the weak,
intermediate and st... | 0909.2414v1 |
2009-09-15 | Linear coupling of modes in 2D radially stratified astrophysical discs | We investigate mode coupling in a two dimensional compressible disc with
radial stratification and differential rotation. We employ the global radial
scaling of linear perturbations and study the linear modes in the local
shearing sheet approximation. We employ a three-mode formalism and study the
vorticity (W), entrop... | 0909.2844v1 |
2009-11-01 | Hierarchy of relevant couplings in perturbative renormalization group transformations | The phase diagram for the interacting fermions in weak coupling is described
by the perturbative renormalization group equations. Due to the lack of
analytic solutions for these coupled non-linear differential equations, it is
rather subtle to tell which couplings are relevant or irrelevant. We propose a
powerful class... | 0911.0166v2 |
2009-11-23 | Couplings in coupled channels versus wave functions: application to the X(3872) resonance | We perform an analytical study of the scattering matrix and bound states in
problems with many physical coupled channels. We establish the relationship of
the couplings of the states to the different channels, obtained from the
residues of the scattering matrix at the poles, with the wave functions for the
different ch... | 0911.4407v2 |
2010-02-02 | Generalized Rashba spin-orbit coupling for cold atoms | We study the possibility to generate a new type of spin-orbit coupling for
the center of mass motion of cold atoms, using laser beams that resonantly
couple N atomic internal ground states to an extra state. After a general
analysis of the scheme, we concentrate on the tetrapod setup (N=4) where the
atomic state can be... | 1002.0578v2 |
2010-06-23 | Motion of pole-dipole and quadrupole particles in non-minimally coupled theories of gravity | We study theories of gravity with non-minimal coupling between polarized
media with pole-dipole and quadrupole moments and an arbitrary function of the
space-time curvature scalar $R$ and the squares of the Ricci and Riemann
curvature tensors. We obtain the general form of the equation of motion and
show that an induce... | 1006.4415v1 |
2010-06-28 | Imaginary Cubic Perturbation: Numerical and Analytic Study | The analytic properties of the ground state resonance energy E(g) of the
cubic potential are investigated as a function of the complex coupling
parameter g. We explicitly show that it is possible to analytically continue
E(g) by means of a resummed strong coupling expansion, to the second sheet of
the Riemann surface, ... | 1006.5303v2 |
2010-07-13 | Dynamical evolution of a scalar field coupling to Einstein's tensor in the Reissner-Nordström black hole spacetime | We study the dynamical evolution of a scalar field coupling to Einstein's
tensor in the background of Reissner-Nordstr\"{o}m black hole. Our results show
that the the coupling constant $\eta$ imprints in the wave dynamics of a scalar
perturbation. In the weak coupling, we find that with the increase of the
coupling con... | 1007.2019v2 |
2010-07-22 | Equivalence condition for the canonical and microcanonical ensembles in coupled spin systems | It is typically assumed, without justification, that a weak coupling between
a system and a bath is a necessary condition for the equivalence of a canonical
ensemble and a microcanonical ensemble. For instance, in a canonical ensemble,
temperature emerges if the system and the bath are uncoupled or weakly coupled.
We i... | 1007.3877v1 |
2010-07-22 | Couplings in coupled channels versus wave functions in the case of resonances: application to the two $Λ(1405)$ states | In this paper we develop a formalism to evaluate wave functions in momentum
and coordinate space for the resonant states dynamically generated in a unitary
coupled channel approach. The on shell approach for the scattering matrix,
commonly used, is also obtained in Quantum Mechanics with a separable
potential, which al... | 1007.3923v2 |
2010-07-26 | Phase synchronization between collective rhythms of globally coupled oscillator groups: noisy identical case | We theoretically investigate collective phase synchronization between
interacting groups of globally coupled noisy identical phase oscillators
exhibiting macroscopic rhythms. Using the phase reduction method, we derive
coupled collective phase equations describing the macroscopic rhythms of the
groups from microscopic ... | 1007.4382v1 |
2010-07-29 | Phase synchronization between collective rhythms of globally coupled oscillator groups: noiseless non-identical case | Phase synchronization between collective oscillations exhibited by two weakly
interacting groups of non-identical phase oscillators with internal and
external global sinusoidal coupling of the groups is analyzed theoretically.
Coupled amplitude equations describing the collective oscillations of the
oscillator groups a... | 1007.5161v1 |
2010-08-18 | Superposition of Inductive and Capacitive Coupling in Superconducting LC Resonators | We present an experimental investigation of lumped-element superconducting LC
resonators designed to provide different types of coupling to a transmission
line. We have designed four resonator geometries including dipole and
quadrupole configured inductors connected in parallel with low loss SiNx
dielectric parallel-pl... | 1008.3130v1 |
2010-08-19 | Synchronization transitions in coupled time-delay electronic circuits with a threshold nonlinearity | Experimental observations of typical kinds of synchronization transitions are
reported in unidirectionally coupled time-delay electronic circuits with a
threshold nonlinearity and two time delays, namely feedback delay $\tau_1$ and
coupling delay $\tau_2$. We have observed transitions from anticipatory to lag
via compl... | 1008.3300v1 |
2010-09-15 | Deducing spectroscopic factors from wave-function asymptotics | In a coupled-channel model, we explore the effects of coupling between
configurations on the radial behavior of the wave function and, in particular,
on the spectroscopic factor (SF) and the asymptotic normalization coefficient
(ANC). We evaluate the extraction of a SF from the ratio of the ANC of the
coupled-channel m... | 1009.2878v3 |
2010-10-04 | Consistent Energy-Based Atomistic/Continuum Coupling for Two-Body Potentials in One and Two Dimensions | This paper addresses the problem of consistent energy-based coupling of
atomistic and continuum models of materials, limited to zero-temperature
statics of simple crystals. It has been widely recognized that the most
practical coupled methods exhibit large errors on the atomistic/continuum
interface (which are often at... | 1010.0512v3 |
2010-10-27 | Cosmology of Chameleons with Power-Law Couplings | In chameleon field theories a scalar field can couple to matter with
gravitational strength and still evade local gravity constraints due to a
combination of self-interactions and the couplings to matter. Originally, these
theories were proposed with a constant coupling to matter, however, the
chameleon mechanism also ... | 1010.5650v2 |
2010-11-13 | Crowd synchrony and quorum sensing in delay-coupled lasers | Crowd synchrony and quorum sensing arise when a large number of dynamical
elements communicate with each other via a common information pool. Previous
evidence in different fields, including chemistry, biology and civil
engineering, has shown that this type of coupling leads to synchronization,
when coupling is instant... | 1011.3155v2 |
2010-11-26 | Coupling slot-waveguide cavities for large-scale quantum optical devices | By offering effective modal volumes significantly less than a cubic
wavelength, slot-waveguide cavities offer a new in-road into strong atom-photon
coupling in the visible regime. Here we explore two-dimensional arrays of
coupled slot cavities which underpin designs for novel quantum emulators and
polaritonic quantum p... | 1011.5690v1 |
2010-11-29 | Quantum dynamics of a dc-SQUID coupled to an asymmetric Cooper pair transistor | We present a theoretical analysis of the quantum dynamics of a
superconducting circuit based on a highly asymmetric Cooper pair transistor
(ACPT) in parallel to a dc-SQUID. Starting from the full Hamiltonian we show
that the circuit can be modeled as a charge qubit (ACPT) coupled to an
anharmonic oscillator (dc-SQUID).... | 1011.6148v1 |
2011-01-04 | Search for W'->tb resonances with left- and right-handed couplings to fermions | We present a search for the production of a heavy gauge boson, W', that
decays to third-generation quarks, by the D0 Collaboration in ppbar collisions
at sqrt(s)= 1.96 TeV. We set 95% confidence level upper limits on the
production cross section times branching fraction. For the first time, we set
limits for arbitrary ... | 1101.0806v2 |
2011-01-25 | Quantum phase transitions for two coupled sites with dipole-coupled effective Jaynes-Cummings model | The nature of the ground states for a system composed of two coupled cavities
with each containing a pair of dipole-coupled two-level atoms are studied over
a wide range of detunings and dipole coupling strengths. The cases for three
limits of exact resonance, large positive and negative detunings are discussed,
and fo... | 1101.4751v2 |
2011-01-25 | Quantum transport of double quantum dots coupled to an oscillator in arbitrary strong coupling regime | In this paper, we investigate the quantum transport of a double quantum dot
coupled with a nanomechanical resonator at arbitrary strong electron-phonon
coupling regimes. We employ the generalized quantum master equation to study
full counting statistics of currents. We demonstrate the coherent phonon states
method can ... | 1101.4864v2 |
2011-01-27 | Next-to-leading order QCD corrections to the top quark associated with $γ$ production via model-independent flavor-changing neutral-current couplings at hadron colliders | We present the complete next-to-leading order (NLO) QCD corrections to the
top quark associated with $\gamma$ production induced by model-independent
$tq\gamma$ and $tqg$ flavor-changing neutral-current (FCNC) couplings at hadron
colliders, respectively. We also consider the mixing effects between the
$tq\gamma$ and $t... | 1101.5346v1 |
2011-02-07 | Impact of spin-orbit coupling on the Holstein polaron | We utilize an exact variational numerical procedure to calculate the ground
state properties of a polaron in the presence of a Rashba-like spin orbit
interaction. Our results corroborate with previous work performed with the
Momentum Average approximation and with weak coupling perturbation theory. We
find that spin or... | 1102.1421v1 |
2011-02-14 | Spatially Coupled Codes over the Multiple Access Channel | We consider spatially coupled code ensembles over a multiple access channel.
Convolutional LDPC ensembles are one instance of spatially coupled codes. It
was shown recently that, for transmission over the binary erasure channel, this
coupling of individual code ensembles has the effect of increasing the belief
propagat... | 1102.2856v1 |
2011-02-22 | Spatially-Coupled MacKay-Neal Codes and Hsu-Anastasopoulos Codes | Kudekar et al. recently proved that for transmission over the binary erasure
channel (BEC), spatial coupling of LDPC codes increases the BP threshold of the
coupled ensemble to the MAP threshold of the underlying LDPC codes. One major
drawback of the capacity-achieving spatially-coupled LDPC codes is that one
needs to ... | 1102.4612v3 |
2011-03-31 | Resonant energy transfer enhanced by off-diagonal exciton-phonon coupling | Dynamics of resonant energy transfer of a single excitation in a molecular
dimer system is studied in the simultaneous presence of diagonal and
off-diagonal exciton-phonon coupling. It is found that the off-diagonal
coupling plays an important role in the excitation energy transfer process.
Coherent transfer can be fou... | 1103.6162v2 |
2011-06-17 | Entanglement spectra of coupled S=1/2 spin chains in a ladder geometry | We study the entanglement spectrum of spin-1/2 XXZ ladders both analytically
and numerically. Our analytical approach is based on perturbation theory
starting either from the limit of strong rung coupling, or from the opposite
case of dominant coupling along the legs. In the former case we find to leading
order that th... | 1106.3419v2 |
2011-09-02 | Half-turn symmetric FPLs with rare couplings and tilings of hexagons | In this work, we put to light a formula that relies the number of fully
packed loop configurations (FPLs) associated to a given coupling pi to the
number of half-turn symmetric FPLs (HTFPLs) of even size whose coupling is a
punctured version of the coupling pi. When the coupling pi is the coupling with
all arches paral... | 1109.0366v1 |
2011-10-05 | Molecule Induced Strong Exchange Coupling between Ferromagnetic Electrodes of a Magnetic Tunnel Junction | Multilayer edge molecular spintronics device (MEMSD) approach can produce
novel logic and memory units for the computers. MEMSD are produced by bridging
the molecular channels across the insulator, in the exposed edge region(s) of a
magnetic tunnel junction (MTJ). The bridged molecular channels start serving as
the dom... | 1110.0885v1 |
2011-10-24 | Oscillatory coupling between a monolithic whispering-gallery resonator and a buried bus waveguide | We report on a combined theoretical and experimental study of the optical
coupling between a microdisk resonator and a waveguide laying on different
planes. While the lateral coupling between a planar resonator and a waveguide
is characterized by a unique distance at which the resonant waveguide
transmission vanishes b... | 1110.5211v1 |
2011-10-31 | Spin-Orbit Coupled Quantum Gases | In this review we will discuss the experimental and theoretical progresses in
studying spin-orbit coupled degenerate atomic gases during the last two years.
We shall first review a series of pioneering experiments in generating
synthetic gauge potentials and spin-orbit coupling in atomic gases by
engineering atom-light... | 1110.6798v1 |
2011-12-20 | Transition from spatial coherence to incoherence in coupled chaotic systems | We investigate the spatio-temporal dynamics of coupled chaotic systems with
nonlocal interactions, where each element is coupled to its nearest neighbors
within a finite range. Depending upon the coupling strength and coupling
radius, we find characteristic spatial patterns such as wave-like profiles and
study the tran... | 1112.4869v2 |
2012-03-06 | Short-range correlations in dilute atomic Fermi gases with spin-orbit coupling | We study the short-range correlation strength of three dimensional spin half
dilute atomic Fermi gases with spin-orbit coupling. The interatomic interaction
is modeled by the contact pseudopotential. In the high temperature limit, we
derive the expression for the second order virial expansion of the
thermodynamic poten... | 1203.1159v1 |
2012-06-01 | Coupling techniques for nonlinear hyperbolic equations. IV. Multi-component coupling and multidimensional well-balanced schemes | This series of papers is devoted to the formulation and the approximation of
coupling problems for nonlinear hyperbolic equations. The coupling across an
interface in the physical space is formulated in term of an augmented system of
partial differential equations. In an earlier work, this strategy allowed us to
develo... | 1206.0248v1 |
2012-06-04 | Microcavity controlled coupling of excitonic qubits | Controlled non-local energy and coherence transfer enables light harvesting
in photosynthesis and non-local logical operations in quantum computing. The
most relevant mechanism of coherent coupling of distant qubits is coupling via
the electromagnetic field. Here, we demonstrate the controlled coherent
coupling of spat... | 1206.0592v1 |
2012-07-04 | Superpotential de-sequestering in string models | Non-perturbative superpotential cross-couplings between visible sector matter
and K\"ahler moduli can lead to significant flavour-changing neutral currents
in compactifications of type IIB string theory. Here, we compute corrections to
Yukawa couplings in orbifold models with chiral matter localised on D3-branes
and no... | 1207.1103v1 |
2012-07-10 | Half--Hypers and Quivers | We study systematically the BPS spectra of N=2 SYM coupled to
half--hypermultiplets, the basic example being E_7 SYM coupled to a half--hyper
in the 56 irrepr. In order to do this, we determine the BPS quivers with
superpotential of such N=2 models using a new technique we introduce. The
computation of the BPS spectra ... | 1207.2275v1 |
2012-07-25 | High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids | We report the observation of strong coupling between the exchange-coupled
spins in gallium-doped yttrium iron garnet and a superconducting coplanar
microwave resonator made from Nb. The measured coupling rate of 450 MHz is
proportional to the square-root of the number of exchange-coupled spins and
well exceeds the loss... | 1207.6039v2 |
2012-08-28 | Spin-orbit coupled particle in a spin bath | We consider a spin-orbit coupled particle confined in a quantum dot in a bath
of impurity spins. We investigate the consequences of spin-orbit coupling on
the interactions that the particle mediates in the spin bath. We show that in
the presence of spin-orbit coupling, the impurity-impurity interactions are no
longer s... | 1208.5606v1 |
2012-08-29 | Modified Bethe-Peierls boundary condition for ultracold atoms with Spin-Orbit coupling | We show that the Bethe-Peierls (BP) boundary condition should be modified for
ultracold atoms with spin-orbit (SO) coupling. Moreover, we derive a general
form of the modified BP boundary condition, which is applicable to a system
with arbitrary kind of SO coupling. In the modified BP condition, an
anisotropic term app... | 1208.5976v4 |
2012-09-22 | Heat flow in InAs/InP heterostructure nanowires | The transfer of heat between electrons and phonons plays a key role for
thermal management in future nanowire-based devices, but only a few
experimental measurements of electron-phonon (e-ph) coupling in nanowires are
available. Here, we combine experimental temperature measurements on an
InAs/InP heterostructure nanow... | 1209.4940v1 |
2012-10-16 | Baryon asymmetry and dark matter from soft leptogenesis | The framework for soft leptogenesis minimally extended with a DM sector is
studied. A heavy singlet neutrino superfield acts as the source for (s)lepton
asymmetry and by coupling to the singlet DM superfield it produces a DM
particle density through decays. The nature of DM generated is twofold
depending on whether the... | 1210.4335v3 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.