publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2010-04-26 | Controlling Entanglement Dynamics by Choosing Appropriate Ratio between Cavity-Fiber Coupling and Atom-Cavity Coupling | The entanglement characteristics including the so-called sudden death effect
between two identical two-level atoms trapped in two separate cavities
connected by an optical fiber are studied. The results show that the time
evolution of entanglement is sensitive not only to the degree of entanglement
of the initial state... | 1004.4395v2 |
2010-04-29 | Coupled tensorial form for atomic relativistic two-particle operator given in second quantization representation | General formulas of the two-electron operator representing either atomic or
effective interactions are given in a coupled tensorial form in relativistic
approximation. The alternatives of using uncoupled, coupled and antisymmetric
two-electron wave functions in constructing coupled tensorial form of the
operator are st... | 1004.5259v1 |
2010-04-29 | On Synchronization of Coupled Hopf-Kuramoto Oscillators with Phase Delays | This paper presents new methods and results on almost global synchronization
of coupled Hopf nonlinear oscillators, which are commonly used as the dynamic
model of engineered central pattern generators (CPGs). On balanced graphs, any
positive coupling gain is proven to induce almost global asymptotic
synchronization, a... | 1004.5366v2 |
2010-06-04 | Mutual Coupling Reduction in Two-Dimensional Array of Microstrip Antennas Using Concave Rectangular Patches | Using concave rectangular patches, a new solution to reduce mutual coupling
and return loss in two-dimensional array of microstrip antennas is proposed.
The effect of width and length concavity on mutual coupling and return loss is
studied. Also, the patch parameters as well as the amounts of width and length
concavity... | 1006.0839v1 |
2010-06-10 | Variational study of a two-level system coupled to a harmonic oscillator in a ultrastrong coupling regime | The nonclassical behaviors of a two-level system coupled to a harmonic
oscillator is investigated in the ultrastrong coupling regime. We revisit the
variational solution of the ground state and find that the existing solution do
not account accurately for nonclassical effects such squeezing. We suggest a
new trial wave... | 1006.1989v2 |
2010-06-17 | Measurement of Higgs Anomalous Coupling with H->WW* at International Linear Collider | The measurement of the Higgs coupling to W bosons is an important program at
the international linear collider (ILC) to search for the anomaly in the
coupling to the gauge bosons. We study the sensitivity of ILC to the Higgs
anomalous coupling to W bosons by using ZH->vvWW* events. In this article, we
report the status... | 1006.3427v1 |
2010-06-17 | Microwave fidelity studies by varying antenna coupling | The fidelity decay in a microwave billiard is considered, where the coupling
to an attached antenna is varied. The resulting quantity, coupling fidelity, is
experimentally studied for three different terminators of the varied antenna: a
hard wall reflection, an open wall reflection, and a 50 Ohm load, corresponding
to ... | 1006.3478v2 |
2010-06-17 | N=2 Generalized Superconformal Quiver Gauge Theory | Four dimensional N=2 generalized superconformal field theory can be defined
by compactifying six dimensional (0,2) theory on a Riemann surface with regular
punctures. In previous studies, gauge coupling constant space is identified
with the moduli space of punctured Riemann surface M_{g,n}. We show that the
weakly coup... | 1006.3486v2 |
2010-06-28 | On the Coupling Property of Lévy Processes | We give necessary and sufficient conditions guaranteeing that the coupling
for L\'evy processes (with non-degenerate jump part) is successful. Our method
relies on explicit formulae for the transition semigroup of a compound Poisson
process and earlier results by Mineka and Lindvall-Rogers on couplings of
random walks.... | 1006.5288v2 |
2010-07-01 | Coupling by reflection of diffusion processes via discrete approximation under a backward Ricci flow | A coupling by reflection of a time-inhomogeneous diffusion process on a
manifold are studied. The condition we assume is a natural time-inhomogeneous
extension of lower Ricci curvature bounds. In particular, it includes the case
of backward Ricci flow. As in time-homogeneous cases, our coupling provides a
gradient esti... | 1007.0275v1 |
2010-07-15 | Perturbations in Matter Bounce with Non-minimal Coupling | In this paper, we investigate the perturbations in matter bounce induced from
Lee-Wick lagrangian with the involvement of non-minimal coupling to the
Einstein Gravity. We find that this extra non-minimal coupling term can cause a
red-tilt on the primordial metric perturbation at extremely large scales. It
can also lead... | 1007.2571v2 |
2010-09-15 | Two-Photon Transport in a Waveguide Coupled to a Cavity with a Two-level System | We consider a system where a waveguide is coupled to a cavity embedded with a
two-level system (TLS), and study the effects when a two-photon quantum state
is injected into the waveguide. The wave function of two outgoing photons is
exactly solved using the Lehmann-Symanzik-Zimmermann (LSZ) reduction formalism.
Our res... | 1009.2828v1 |
2010-09-27 | Higher-order coupled quintessence | We study a coupled quintessence model in which the interaction with the dark
matter sector is a function of the quintessence potential. Such a coupling can
arise from a field dependent mass term for the dark matter field. The dynamical
analysis of a standard quintessence potential coupled with the interaction
explored ... | 1009.5263v1 |
2010-09-27 | $g_{D^{\ast}_{s}D K^{\ast}(892)}$ and $g_{B^{\ast}_{s}B K^{\ast}(892)}$ coupling constants in QCD sum rules | The coupling constants $g_{D^{\ast}_{s}D K^{\ast}(892)}$ and
$g_{B^{\ast}_{s}B K^{\ast}(892)}$ are calculated in the framework of
three-point QCD sum rules. The correlation functions responsible for these
coupling constants are evaluated considering contributions of both $D(B)$ and
$K^*(892)$ mesons as off-shell states... | 1009.5320v2 |
2010-10-05 | Electromagnetically Induced Transparency from Two Phonon Processes in Quadratically Coupled Membranes | We describe how electromagnetically induced transparency can arise in
quadratically coupled optomechanical systems. Due to quadratic coupling the
underlying optical process involves a two phonon process in optomechanical
system and this two phonon process makes the mean amplitude, which plays the
role of atomic coheren... | 1010.0757v1 |
2010-10-21 | Anomalous coupling of scalars to gauge fields | We study the transformation properties of a scalar-tensor theory, coupled to
fermions, under the Weyl rescaling associated with a transition from the Jordan
to the Einstein frame. We give a simple derivation of the corresponding
modification to the gauge couplings. After changing frame, this gives rise to a
direct coup... | 1010.4536v2 |
2010-10-23 | Unconventional plasmon-phonon coupling in graphene | We calculate hybridization of plasmons and intrinsic optical phonons in
graphene by using the self-consistent linear response formalism. We find that
longitudinal plasmons (transverse magnetic modes) couple exclusively to
transverse optical phonons, whereas graphene's transverse plasmons (transverse
electric modes) cou... | 1010.4871v2 |
2010-11-09 | Matching with Couples Revisited | It is well known that a stable matching in a many-to-one matching market with
couples need not exist. We introduce a new matching algorithm for such markets
and show that for a general class of large random markets the algorithm will
find a stable matching with high probability. In particular we allow the number
of cou... | 1011.2121v2 |
2010-12-06 | Extreme value statistics in coupled lasers | Experimental configuration for investigating the dynamics and the statistics
of the phase locking level of coupled lasers that have no common frequency is
presented. The results reveal that the probability distribution of the phase
locking level of such coupled lasers fits a Gumbel distribution that describes
the extre... | 1012.1292v1 |
2010-12-27 | Quantum behaviour of a flux qubit coupled to a resonator | We present a detailed theoretical analysis for a system of a superconducting
flux qubit coupled to a transmission line resonator. The master equation,
accounting incoherent processes for a weakly populated resonator, is
analytically solved. An electromagnetic wave transmission coefficient through
the system, which prov... | 1012.5599v1 |
2011-01-05 | Statistical Evidence Against Simple Forms of Wavefunction Collapse | If the initial quantum state of the universe is a multiverse superposition
over many different sets of values of the effective coupling "constants" of
physics, and if this quantum state collapses to an eigenstate of the set of
coupling "constants" with a probability purely proportional to the absolute
square of the amp... | 1101.1083v1 |
2011-01-14 | Weak coupling limits in a stochastic model of heat conduction | We study the Brownian momentum process, a model of heat conduction, weakly
coupled to heat baths. In two different settings of weak coupling to the heat
baths, we study the non-equilibrium steady state and its proximity to the local
equilibrium measure in terms of the strength of coupling. For three and four
site syste... | 1101.2877v1 |
2011-01-17 | Desynchronization bifurcation of coupled nonlinear dynamical systems | We analyze the desynchronization bifurcation in the coupled R\"ossler
oscillators. After the bifurcation the coupled oscillators move away from each
other with a square root dependence on the parameter. We define system
transverse Lyapunov exponents and in the desynchronized state one is positive
while the other is neg... | 1101.3130v1 |
2011-01-18 | Magnetic Excitations in the Site-Centered Stripe Phase: Spin Wave Theory of Coupled Three-Leg Ladders | The success of models of coupled two-leg spin ladders in describing the
magnetic excitation spectrum of La_{2-x}Ba_xCuO_4 had been interpreted
previously as evidence for bond-centered stripes. In a recent article, however,
we have determined the magnetic coupling induced by the charge stripes between
bond- or site-cent... | 1101.3434v1 |
2011-01-20 | Synchronization of chaotic networks with time-delayed couplings: An analytic study | Networks of nonlinear units with time-delayed couplings can synchronize to a
common chaotic trajectory. Although the delay time may be very large, the units
can synchronize completely without time shift. For networks of coupled
Bernoulli maps, analytic results are derived for the stability of the chaotic
synchronizatio... | 1101.3956v1 |
2011-02-14 | Turing instability in oscillator chains with non-local coupling | We investigate analytically and numerically the conditions for the Turing
instability to occur in a one-dimensional chain of nonlinear oscillators
coupled non-locally in such a way that the coupling strength decreases with the
spatial distance as a power-law. A range parameter makes possible to cover the
two limiting c... | 1102.2834v1 |
2011-02-15 | A Phenomenological Study on Threshold Improvement via Spatial Coupling | Kudekar et al. proved an interesting result in low-density parity-check
(LDPC) convolutional codes: The belief-propagation (BP) threshold is boosted to
the maximum-a-posteriori (MAP) threshold by spatial coupling. Furthermore, the
authors showed that the BP threshold for code-division multiple-access (CDMA)
systems is ... | 1102.3056v2 |
2011-02-16 | Lagrange equations coupled to a thermal equation: mechanics as consequence of thermodynamics | Following the analytic approach to thermodynamics developed by Stueckelberg,
we study the evolution equations of a closed thermodynamic system consisting of
point particles in a fluid. We obtain a system of coupled differential
equations describing the mechanical and the thermal evolution of the system.
The coupling be... | 1102.3418v1 |
2011-02-21 | Multifractal analysis of nonhyperbolic coupled map lattices: Application to genomic sequences | Symbolic sequences generated by coupled map lattices (CMLs) can be used to
model the chaotic-like structure of genomic sequences. In this study it is
shown that diffusively coupled Chebyshev maps of order 4 (corresponding to a
shift of 4 symbols) very closely reproduce the multifractal spectrum $D_q$ of
human genomic s... | 1102.4237v1 |
2011-02-25 | Entanglement Entropy of Coupled Conformal Field Theories and Fermi Liquids | In this paper we calculate the entanglement entropy of two coupled gapless
systems in general spatial dimension d. The gapless systems can be either
conformal field theories (CFT), or Fermi liquids. We assume the two systems are
coupled uniformly in a h-dimensional submanifold of the space, with 0 <= h <=
d. We will fo... | 1102.5345v1 |
2011-03-02 | Center manifold reduction for large populations of globally coupled phase oscillators | A bifurcation theory for a system of globally coupled phase oscillators is
developed based on the theory of rigged Hilbert spaces. It is shown that there
exists a finite-dimensional center manifold on a space of generalized
functions. The dynamics on the manifold is derived for any coupling functions.
When the coupling... | 1103.0363v1 |
2011-03-14 | Conflicting coupling of the unpaired nucleons and the structure of collective bands in odd-odd nuclei | Conflicting coupling of unpaired nucleons in the odd-odd nuclei is discussed.
A very simple explanation is suggested for the damping of the energy spacing of
the lowest levels in the rotational bands in the odd-odd nuclei in the case of
a "conflicting" coupling of the odd proton and neutron comparative to those of
the ... | 1103.2609v1 |
2011-03-15 | Coupled-resonator-induced transparency with a squeezed vacuum | We present the first experimental observation of quantum fluctuation spectra
in two coupled optical cavities with an injected squeezed vacuum light. The
quadrature components of the reflected squeezed vacuum spectra are measured by
phase sensitive homodyne detector. The experimental results demonstrate
coupled-resonato... | 1103.2836v2 |
2011-03-28 | Coupled coincidence point theorems for nonlinear contractions in partially ordered metric spaces | We obtain coupled coincidence and coupled common fixed point theorems for
mixed $g$-monotone nonlinear operators $F:X \times X \rightarrow X$ in
partially ordered metric spaces. Our results are generalizations of recent
coincidence point theorems due to Lakshmikantham and \' Ciri\' c
[Lakshmikantham, V., \' Ciri\' c, L... | 1103.5288v1 |
2011-03-28 | Klein-tunneling-enhanced directional coupler for Dirac electron wave in graphene | Using the coupled-mode theory in guided-wave optics and electronics, we
explore a directional coupling structure composed of two parallel waveguides
electrostatically induced by the split-gate technique in bulk graphene. Our
results show that Klein tunneling can greatly enhance the coupling strength of
the structure. B... | 1103.5375v1 |
2011-03-31 | Dynamics of multi-frequency oscillator ensembles with resonant coupling | We study dynamics of populations of resonantly coupled oscillators having
different frequencies. Starting from the coupled van der Pol equations we
derive the Kuramoto-type phase model for the situation, where the natural
frequencies of two interacting subpopulations are in relation 2:1. Depending on
the parameter of c... | 1103.6194v1 |
2011-04-10 | Linear Stationary Iterative Methods for the Force-based Quasicontinuum Approximation | Force-based multiphysics coupling methods have become popular since they
provide a simple and efficient coupling mechanism, avoiding the difficulties in
formulating and implementing a consistent coupling energy. They are also the
only known pointwise consistent methods for coupling a general atomistic model
to a finite... | 1104.1774v1 |
2011-04-12 | On the Coupling Property and the Liouville Theorem for Ornstein-Uhlenbeck Processes | Using a coupling for the weighted sum of independent random variables and the
explicit expression of the transition semigroup of Ornstein-Uhlenbeck processes
driven by compound Poisson processes, we establish the existence of a
successful coupling and the Liouville theorem for general Ornstein-Uhlenbeck
processes. Then... | 1104.2166v2 |
2011-04-20 | SIR epidemics in monogamous populations with recombination | We study the propagation of an SIR (susceptible-infectious-recovered) disease
over an agent population which, at any instant, is fully divided into couples
of agents. Couples are occasionally allowed to exchange their members. This
process of couple recombination can compensate the instantaneous disconnection
of the in... | 1104.4102v1 |
2011-05-24 | Enumerating ODE Equivalent Homogeneous Networks | We give an simple criterion for ODE equivalence in identical edge homogeneous
coupled cell networks. This allows us to give a simple proof of Theorem 10.3 of
Aquiar and Dias "Minimal Coupled Cell Networks", which characterizes minimal
identical edge homogeneous coupled cell networks. Using our criterion we give a
formu... | 1105.4812v1 |
2011-06-09 | Hamiltonian of mean force for damped quantum systems | We consider a quantum system linearly coupled to a reservoir of harmonic
oscillators. For finite coupling strengths, the stationary distribution of the
damped system is not of the Gibbs form, in contrast to standard thermodynamics.
With the help of the quantum Hamiltonian of mean force, we quantify this
deviation exact... | 1106.1775v1 |
2011-06-22 | Complete chaotic synchronization and exclusion of mutual Pyragas control in two delay-coupled Rössler-type oscillators | Two identical chaotic oscillators that are mutually coupled via time delayed
signals show very complex patterns of completely synchronized dynamics
including stationary states and periodic as well as chaotic oscillations. We
have experimentally observed these synchronized states in delay-coupled
electronic circuits and... | 1106.4420v1 |
2011-06-28 | Phase separation in a polarized Fermi gas with spin-orbit coupling | We study the phase separation of a spin polarized Fermi gas with spin-orbit
coupling near a wide Feshbach resonance. As a result of the competition between
spin-orbit coupling and population imbalance, the phase diagram for a uniform
gas develops a rich structure of phase separation involving gapless superfluid
states ... | 1106.5667v2 |
2011-06-28 | Quantum Brownian motion of multipartite systems and their entanglement dynamics | We solve the model of N quantum Brownian oscillators linearly coupled to an
environment of quantum oscillators at finite temperature, with no extra
assumptions about the structure of the system-environment coupling. Using a
compact phase-space formalism, we give a rather quick and direct derivation of
the master equati... | 1106.5752v1 |
2011-07-04 | Anomalous Hall conductivity from the dipole mode of spin-orbit-coupled cold-atom systems | Motivated by recent experiments [Lin {\it et al.}, Nature {\bf 417}, 83
(2011)] that engineered spin-orbit coupling in ultra-cold mixtures of bosonic
atoms, we study the dipole oscillation of trapped spin-orbit-coupled
non-condensed Bose and Fermi gases. We find that different directions of
oscillation are coupled by t... | 1107.0578v1 |
2011-07-08 | Emission spectrum of quasi-resonant laterally coupled quantum dots | We calculate the emission spectrum of neutral and charged excitons in a pair
of laterally coupled InGaAs quantum dots with nearly degenerate energy levels.
As the interdot distance decreases, a number of changes take place in the
emission spectrum which can be used as indications of molecular coupling. These
signatures... | 1107.1590v2 |
2011-07-09 | Coupled-wave model for square-lattice photonic-crystal lasers with TE polarization -- a general approach | A general coupled-wave model is presented for square-lattice photonic crystal
(PC) lasers with transverse-electric polarization. This model incorporates the
high-order coupling effects that are important for two-dimensional PC laser
cavities and gives a general and rigorous coupled-wave formulation for the full
three-d... | 1107.1772v1 |
2011-07-25 | On the Role of the Running Coupling Constant in a Quark Model Analysis of T-odd TMDs | We revisit the standard procedure to match non-perturbative models to
perturbative QCD, using experimental data. The strong coupling constant plays a
central role in the QCD evolution of parton densities. We will extend this
procedure with a non-perturbative generalization of the QCD running coupling
and use this new d... | 1107.4880v1 |
2011-07-26 | Bottle microresonator with actively stabilized evanescent coupling | The evanescent coupling of light between a whispering-gallery-mode bottle
microresonator and a sub-wavelength-diameter coupling fiber is actively
stabilized by means of a Pound-Drever-Hall technique. We demonstrate the
stabilization of a critically coupled resonator with a control bandwidth of 0.1
Hz, yielding a residu... | 1107.5249v2 |
2011-07-29 | Strong plasmon coupling between two gold nanospheres on a gold slab | In this work, the plasmon coupling effect between two gold nanospheres on a
gold slab is investigated. At plasmon resonance frequencies, electrons on the
surface of the slab are absorbed into spheres and contribute to plasmon
oscillation. This effect can help enhance the local electric field and optical
coupling force ... | 1107.5939v1 |
2011-08-01 | Charge redistribution and interlayer coupling in twisted bilayer graphene under electric fields | We investigate the electronic density redistribution of rotated bilayer
graphene under a perpendicular electric field, showing that the layers are
actually coupled even for large angles. This layer-layer coupling is evidenced
by the charge transfer on these structures as a function of the external
voltage. We find an i... | 1108.0395v1 |
2011-08-02 | Critical optical coupling between a GaAs disk and a nanowaveguide suspended on the chip | We report on an integrated GaAs disk/waveguide system. A millimeter-long
waveguide is suspended and tapered on the chip over a length of 25 {\mu}m to
evanescently couple to high Q optical whispering gallery modes of a GaAs disk.
The critical coupling regime is obtained both by varying the disk/guide gap
distance and th... | 1108.0680v1 |
2011-08-09 | Microcavities coupled to multilevel atoms | A three-level atom in the $\Lambda$-configuration coupled to a microcavity is
studied. The two transitions of the atom are assumed couple to different
counterpropagating mode pairs in the cavity. We analyze the dynamics both, in
the strong-coupling and the bad cavity limit. We find that compared to a
two-level setup, t... | 1108.1931v1 |
2011-08-10 | Erratum: Engineering a p+ip Superconductor: Comparison of Topological Insulator and Rashba Spin-Orbit Coupled Materials [Phys. Rev. B 83, 184520 (2011)] | In this erratum, we revisit the issue of bulk-disorder on proposals to
realize an effective p+ip superconductor from spin-orbit coupled materials.
Contrary to the claim in [Phys. Rev. B 83, 184520 (2011)], we show that the
pair breaking effects of bulk-disorder are negligible, and that bulk disorder
does not suppress t... | 1108.2260v1 |
2011-08-20 | On optimal stationary couplings between stationary processes | By a classical result of Gray, Neuhoff and Shields (1975) the $\bar\varrho$
distance between stationary processes is identified with an optimal stationary
coupling problem of the corresponding stationary measures on the infinite
product spaces. This is a modification of the optimal coupling problem from
Monge--Kantorov... | 1108.4086v1 |
2011-08-31 | A Maxwell field minimally coupled to torsion | We consider the Lagrangian density for a free Maxwell field, in which the
electromagnetic field tensor minimally couples to the affine connection, in the
Einstein-Cartan-Sciama-Kibble theory of gravity. We derive the formulae for the
torsion and electromagnetic field tensors in terms of the electromagnetic
potential. T... | 1108.6100v1 |
2011-09-08 | Mixed Ising ferrimagnets with next-nearest neighbour couplings on square lattices | We study Ising ferrimagnets on square lattices with antiferromagnetic
exchange couplings between spins of values S=1/2 and S=1 on neighbouring sites,
couplings between S=1 spins at next--nearest neighbour sites of the lattice,
and a single--site anisotropy term for the S=1 spins. Using mainly ground state
consideration... | 1109.1709v1 |
2011-10-04 | Spin-orbit-coupled dipolar Bose-Einstein condensates | We propose an experimental scheme to create spin-orbit coupling in spin-3 Cr
atoms using Raman processes. Employing linear Zeeman effect and optical Stark
shift, two spin states within the ground electronic manifold are selected,
which results in a pseudo-spin-1/2 model. We further study the ground state
structures of ... | 1110.0558v3 |
2011-10-28 | Artificial spin-orbit coupling in ultra-cold Fermi superfluids | We develop a theory for interacting fermions in the presence of spin-orbit
coupling and Zeeman fields, and show that many new superfluids phases, which
are topological in nature, emerge. Depending on values of spin-orbit coupling,
Zeeman fields, and interactions, initially gapped s-wave superfluids acquire
p-wave, d-wa... | 1110.6364v1 |
2011-12-14 | Geometric entangling gates for coupled cavity system in decoherence-free subspaces | We propose a scheme to implement geometric entangling gates for two logical
qubits in a coupled cavity system in decoherence-free subspaces. Each logical
qubit is encoded with two atoms trapped in a single cavity and the geometric
entangling gates are achieved by cavity coupling and controlling the external
classical l... | 1112.3133v1 |
2011-12-15 | Synchronization of Micromechanical Oscillators Using Light | Synchronization, the emergence of spontaneous order in coupled systems, is of
fundamental importance in both physical and biological systems. We demonstrate
the synchronization of two dissimilar silicon nitride micromechanical
oscillators, that are spaced apart by a few hundred nanometers and are coupled
through optica... | 1112.3636v2 |
2011-12-27 | Synthetic 3D Spin-Orbit Coupling | We describe a method for creating a three-dimensional analogue to Rashba
spin-orbit coupling in systems of ultracold atoms. This laser induced coupling
uses Raman transitions to link four internal atomic states with a tetrahedral
geometry, and gives rise to a Dirac point that is robust against environmental
perturbatio... | 1112.6022v2 |
2012-02-06 | Segregation and symmetry breaking of strongly coupled two-component Bose-Einstein condensates in a harmonic trap | We study ground states of two-component condensates in a harmonic trap. We
prove that in the strongly coupled and weakly interacting regime, the two
components segregate while a symmetry breaking occurs. More precisely, we show
that when the intercomponent coupling strength is very large and both
intracomponent couplin... | 1202.1079v1 |
2012-02-13 | Construction and separability of nonlinear soliton integrable couplings | A very natural construction of integrable extensions of soliton systems is
presented. The extension is made on the level of evolution equations by a
modification of the algebra of dynamical fields. The paper is motivated by
recent works of Wen-Xiu Ma et al. (Comp. Math. Appl. 60 (2010) 2601, Appl.
Math. Comp. 217 (2011... | 1202.2682v1 |
2012-02-24 | Phase locking dynamics of dipolarly coupled vortex-based spin transfer oscillators | Phase locking dynamics of dipolarly coupled vortices excited by
spin-polarized current in two identical nanopillars is studied as a function of
the interpillar distance L. Numerical study and analytical model have proved
the remarkable efficiency of magneto-static interaction to achieve phase
locking. Investigating the... | 1202.5499v1 |
2012-02-26 | Hopping-resolved electron-phonon coupling in bilayer graphene | In this paper we investigate the electron-phonon coupling in bilayer
graphene, as a paradigmatic case for multilayer graphenes where interlayer
hoppings are relevant. Using a frozen-phonon approach within the context of
Density Functional Theory (DFT) and using different optical phonon
displacements we are able to eval... | 1202.5786v1 |
2012-03-15 | Decoherence effect on the Fano lineshapes in double quantum dots coupled between normal and superconducting leads | We investigate the Fano-type spectroscopic lineshapes of the T-shape double
quantum dot coupled between the conducting and superconducting electrodes and
analyze their stability on a decoherence. Because of the proximity effect the
quantum interference patterns appear simultaneously at +/- epsilon_2, where
epsilon_2 is... | 1203.3393v1 |
2012-03-16 | Computational aspects of nuclear coupled-cluster theory | We discuss computational aspects of the spherical coupled-cluster method
specific to the nuclear many-body problem. Using chiral nucleon-nucleon
interaction at next-to-next-to-next-to leading order (N3LO) with cutoff Lambda
= 500MeV, we present coupled-cluster results for the ground state of 40Ca.
Scaling and performan... | 1203.3765v1 |
2012-03-20 | Quasiattractors in coupled maps and coupled dielectric cavities | We study the origin of attracting phenomena in the ray dynamics of coupled
optical microcavities. To this end we investigate a combined map that is
composed of standard and linear map, and a selection rule that defines when
which map has to be used. We find that this system shows attracting dynamics,
leading exactly to... | 1203.4316v1 |
2012-03-28 | Sommerfeld Enhancement from Multiple Mediators | We study the Sommerfeld enhancement experienced by a scattering object that
couples to a tower of mediators. This can occur in, e.g., models of secluded
dark matter when the mediator scale is generated naturally by hidden-sector
confinement. Specializing to the case of a confining CFT, we show that
off-resonant values ... | 1203.6341v2 |
2012-06-04 | Synchronization of coupled neural oscillators with heterogeneous delays | We investigate the effects of heterogeneous delays in the coupling of two
excitable neural systems. Depending upon the coupling strengths and the time
delays in the mutual and self-coupling, the compound system exhibits different
types of synchronized oscillations of variable period. We analyze this
synchronization bas... | 1206.0789v1 |
2012-06-11 | Synchronization in the presence of distributed delays | We study systems of identical coupled oscillators introducing a distribution
of delay times in the coupling. For arbitrary network topologies, we show that
the frequency and stability of the fully synchronized states depend only on the
mean of the delay distribution. However, synchronization dynamics is sensitive
to th... | 1206.2288v2 |
2012-06-27 | Graphene p-n junctions with nonuniform Rashba spin-orbit coupling | Linear conductance of graphene-based p-n junctions with Rashba spin-orbit
coupling is considered theoretically. A square potential step is used to model
the junctions, while the coupling is introduced in terms of the Kane-Mele model
(C.L. Kane and E.J. Mele, Phys.Rev.Lett. 95, 226801(2005)). The main objective
is a des... | 1206.6503v1 |
2012-07-17 | Coupled quantum oscillators within independent quantum reservoirs | System of the quantum Langevin equations for two quantum coupling oscillators
within independent heat baths of quantum oscillators are obtained using a model
Hamiltonian and corresponding Heisenberg equations of motion. Expressions for
mean energy of coupled oscillators and their mean energy of interaction are
derived ... | 1207.3881v1 |
2012-07-23 | Synthetic spin-orbit coupling in ultracold $Λ$-type atoms | We consider the simulation of non-abelian gauge potentials in ultracold atom
systems with atom-field interaction in the $\Lambda$ configuration where two
internal states of an atom are coupled to a third common one with a detuning.
We find the simulated non-abelian gauge potentials can have the same structures
as those... | 1207.5369v1 |
2012-07-26 | Weyl meson and its implications in collider physics and cosmology | Local scale invariant theory leads to the existence of a new particle called
the Weyl vector meson. We study a generalized Standard Model, which displays
local scale invariance. The model contains a real scalar field, besides the
Higgs multiplet and coupling between the Higgs and Weyl meson. For certain
range of coupli... | 1207.6195v2 |
2012-08-07 | A proposal for realizing a 3-qubit controlled-phase gate with superconducting qubit systems coupled to a cavity | We present a way to realize a 3-qubit quantum controlled-phase gate with
superconducting qubit systems coupled to a cavity. This proposal does not
require adjustment of the qubit level spacings or identical qubit-cavity
coupling constants. Moreover, since only a resonant interaction is applied, the
gate can be performe... | 1208.1345v1 |
2012-08-16 | States of Enhanced Activity in a Network of Pulse Coupled Oscillators with Dynamic Coupling | We investigate states of enhanced activity in a biological neuronal network
composed of pulse-coupled oscillators. The synaptic couplings between the
neurons are dynamic, modeling spike time dependent plasticity. The network
exhibits statistical characteristics which recently have been identified in an
analysis of epil... | 1208.3354v1 |
2012-08-21 | Finite element modeling of coupled optical microdisk resonators for displacement sensing | We analyze normal mode splitting in a pair of vertically coupled microdisk
resonators. A full vectorial finite element model is used to find the eigen
frequencies of the symmetric and antisymmetric composite modes as a function of
coupling distance. We find that the coupled microdisks can compete with the
best Fabry-Pe... | 1208.4320v2 |
2012-08-30 | Robust Stability of Quantum Systems with a Nonlinear Coupling Operator | This paper considers the problem of robust stability for a class of uncertain
quantum systems subject to unknown perturbations in the system coupling
operator. A general stability result is given for a class of perturbations to
the system coupling operator. Then, the special case of a nominal linear
quantum system is c... | 1208.6061v1 |
2012-09-04 | Quantum nanostructures in strongly spin-orbit coupled two-dimensional systems | Recent progress in experimental studies of low-dimensional systems with
strong spin-orbit coupling poses a question on the effect of this coupling on
the energy spectrum of electrons in semiconductor nanostructures. It is shown
in the paper that this effect is profound in the strong coupling limit. In
circular quantum ... | 1209.0828v1 |
2012-09-13 | Beam Dynamics in a Double-Channel Waveguide with Gain and Loss | A double-channel waveguide with gain and loss is addressed and the
corresponding coupled-mode equations are established by employing the coupled
mode approach. Based on the coupled-mode equations, the beam dynamics in the
double-channel waveguide with gain and loss is investigated, and the results
show that there exist... | 1209.2762v1 |
2012-09-21 | Adiabatic pumping through an interacting quantum dot with spin-orbit coupling | We study adiabatic pumping through a two-level quantum dot with spin-orbit
coupling. Using a diagrammatic real-time approach, we calculate both the pumped
charge and spin for a periodic variation of the dot's energy levels in the
limit of weak tunnel coupling. Thereby, we compare the two limits of vanishing
and infinit... | 1209.4770v2 |
2012-09-26 | Low temperature acoustic polaron localization | We calculate the low temperature properties of an acoustic polaron in three
dimensions in thermal equilibrium at a given temperature using a specialized
path integral Monte Carlo method. In particular we find numerical evidence that
the chosen Hamiltonian for the acoustic polaron describes a phase transition
from a loc... | 1209.5975v1 |
2012-10-04 | QED with chiral nonminimal coupling: aspects of the Lorentz-violating quantum corrections | An effective model for QED with the addition of a nonminimal coupling with a
chiral character is investigated. This term, which is proportional to a fixed
4-vector $b_\mu$, violates Lorentz symmetry and may originate a CPT-even
Lorentz breaking term in the photon sector. It is shown that this Lorentz
breaking CPT-even ... | 1210.1552v1 |
2012-10-08 | Thermal emission in the ultrastrong coupling regime | We study thermal emission of a cavity quantum electrodynamic system in the
ultrastrong-coupling regime where the atom-cavity coupling rate becomes
comparable the cavity resonance frequency. In this regime, the standard
descriptions of photodetection and dissipation fail. Following an approach that
was recently put forw... | 1210.2318v1 |
2012-10-10 | New Two-Componet Coupled KdV Equation and its Connection with the Generalized Harry Dym Equation | It is shown that, two different Lax operators in the Dym hierarchy, produce
two generalized coupled Harry Dym equations. These equations transform, via the
reciprocal link, to the coupled two-component KdV system. The first equation
gives us new integrable two-component KdV system while the second reduces to
the known ... | 1210.2819v2 |
2012-10-11 | Anomalous Wtb couplings in gamma-proton collision at the LHC | We study the possibility for the process $pp \rightarrow p\gamma p
\rightarrow pW^-t(W^+\bar t)X$ with anomalous Wtb couplings in a model
independent effective Lagrangian approach at the LHC. We find 95% confidence
level bounds on the anomalous coupling parameters for various values of the
integrated luminosity. The im... | 1210.3235v1 |
2012-10-15 | Highly efficient optical filter based on vertically coupled Photonic crystal cavity and bus waveguide | We experimentally demonstrate a new optical filter design based on a
vertically coupled photonic crystal cavity and a bus waveguide monolithically
integrated on the silicon on insulator platform. The use of a vertically
coupled waveguide gives flexibility in the choice of the waveguide material and
dimensions, dramatic... | 1210.4138v1 |
2012-10-16 | Strong coupling of in-plane plasmon modes and their control | We show anti-crossings due to strong in-plane coupling of plasmon modes in
dielectric-metal-dielectric structure with top 2D dielectric pattern.
Experimentally measured anti-crossing widths are compared with those calculated
by coupled mode theory. It is shown that the coupling strength of the plasmon
modes can be cont... | 1210.4252v1 |
2012-10-26 | Coupling limit order books and branching random walks | We consider a model for a one-sided limit order book proposed by Lakner et
al. We show that it can be coupled with a branching random walk and use this
coupling to answer a non-trivial question about the long-term behavior of the
price. The coupling relies on a classical idea of enriching the state-space by
artificiall... | 1210.7062v3 |
2012-10-31 | Heavy Quark Production and Energy Loss | Heavy flavor research is a vigorous and active topic in high-energy QCD
physics. Comparing theoretical predictions to data as a function of flavor
provides a unique opportunity to tease out properties of quark-gluon plasma. We
explicitly demonstrate this utility with energy loss predictions based on the
assumption of 1... | 1210.8330v1 |
2012-11-13 | Anomalous quartic ZZgammagamma couplings in gamma-proton collision at the LHC | We investigate the constraints on the anomalous quartic $ZZ\gamma\gamma$
couplings through the process $p p\to p\gamma p\to p \gamma q Z X$ at the LHC.
Taking into consideration various forward detector acceptances and integrated
LHC luminosities, we find 95% confidence level bounds on the anomalous coupling
parameters... | 1211.3100v1 |
2012-11-14 | The gradient flow running coupling scheme | The Yang-Mills gradient flow in finite volume is used to define a running
coupling scheme. As our main result the discrete beta-function, or step scaling
function, is calculated for scale change s=3/2 at several lattice spacings for
SU(3) gauge theory coupled to N_f = 4 fundamental massless fermions. The
continuum extr... | 1211.3247v1 |
2012-11-23 | The effect of isoscalar-isovector coupling in infinite nuclear matter | Working on the framework of Relativistic Mean Field theory, we exposed the
effect of nonlinear isoscalar-isovector coupling on G2 parameter set on the
density dependence of nuclear symmetry energy in infinite nuclear matter. The
observables like symmetric energy and few related coefficients are studied
systematically. ... | 1211.5461v1 |
2012-12-11 | Stability of symmetric and nonsymmetric FEM-BEM couplings for nonlinear elasticity problems | We consider symmetric as well as non-symmetric coupling formulations of FEM
and BEM in the frame of nonlinear elasticity problems. In particular, the
Johnson-N\'ed\'elec coupling is analyzed. We prove that these coupling
formulations are well-posed and allow for unique Galerkin solutions if standard
discretizations by ... | 1212.2620v1 |
2012-12-26 | Ultrastrong coupling in a scalable design for circuit QED with superconducting flux qubits | We theoretically study a circuit quantum electrodynamics (QED) architecture
with superconducting flux qubits. The qubit is coupled to the transmission line
resonator by an ac current originating from the current mode of the resonator.
Ultrastrong coupling can be obtained by varying the capacitance between the
qubit and... | 1212.6181v3 |
2013-01-02 | Coherence and pattern formation in coupled logistic-map lattices | Three quantitative measures of the spatiotemporal behavior of the coupled map
lattices: reduced density matrix, reduced wave function, and an analog of
particle number, have been introduced. They provide a quantitative meaning to
the concept of coherence which in the context of complex systems have been used
rather int... | 1301.0231v2 |
2013-01-03 | Faddeev-Popov ghosts in quantum gravity beyond perturbation theory | We study the Faddeev-Popov ghost sector of asymptotically safe quantum
gravity, which becomes non-perturbative in the ultraviolet. We point out that
nonzero matter-ghost couplings and higher-order ghost self-interactions exist
at a non-Gaussian fixed point for the gravitational couplings, i.e., in the
ultraviolet. Thus... | 1301.0632v2 |
2013-01-07 | Eddington inspired Born Infeld Theory: A new look to the matter-coupling paradigm | We discuss some of the consequences of changing the matter to gravity
coupling without affecting the gravitational dynamics. The Einstein tensor is
usually assumed to be proportional to the stress tensor due to the divergence
free property of both object. This is not the only consistent way to couple
matter to gravity;... | 1301.1233v2 |
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