publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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1993-09-22 | Symmetry properties of SU3 vector coupling coefficients | A presentation of the problem of calculating the vector coupling coefficients
for $SU3 \supset SU2 \otimes U1$ is made, in the spirit of traditional
treatments of SU2 coupling. The coefficients are defined as the overlap matrix
element between product states and a coupled state with good SU3 quantum
numbers. A techniqu... | 9309023v1 |
1999-03-30 | A program for coupled-channels calculations with all order couplings for heavy-ion fusion reactions | A FORTRAN77 program is presented that calculates fusion cross sections and
mean angular momenta of the compound nucleus under the influence of couplings
between the relative motion and several nuclear collective motions. The
no-Coriolis approximation is employed to reduce the dimension of
coupled-channels equations. Th... | 9903074v1 |
2004-09-06 | Gauge symmetric delta(1232) couplings and the radiative muon capture in hydrogen | Using the difference between the gauge symmetric and standard pi-N-delta
couplings, a contact pi-pi-N-N term, quadratic in the pi-N-delta coupling, is
explicitly constructed. Besides, a contribution from the delta excitation
mechanism to the photon spectrum for the radiative muon capture in hydrogen is
derived from the... | 0409011v1 |
2004-06-18 | Accurate calculations of magnetic dipole and electric quadrupole hyperfine coupling constants of 6 P_{3/2} state of Cesium atom : A Relativistic Coupled Cluster approach | We report the magnetic dipole and electric quadrupole hyperfine coupling
constants of 6 P_{3/2} state of ^{133} Cs(I= {7/2}) obtained from the
relativistic coupled cluster (RCC) method. To our knowledge, no prior electric
quadrupole hyperfine CC calculation is available for ^{133} Cs(6 P_{3/2})
state. Our computed magn... | 0406083v1 |
2004-11-26 | On linear coupling of acoustic and cyclotron waves in plasma flows | It is found that in magnetized electrostatic plasma flows the velocity shear
couples ion-acoustic waves with ion-cyclotron waves and leads, under favorable
conditions, to their efficient reciprocal transformations. It is shown that in
a two-dimensional setup this coupling has a remarkable feature: it is governed
by equ... | 0411235v1 |
2005-06-10 | Coupled-mode theory for periodic side-coupled microcavity and photonic crystal structures | We use a phenomenological Hamiltonian approach to derive a set of coupled
mode equations that describe light propagation in waveguides that are
periodically side-coupled to microcavities. The structure exhibits both Bragg
gap and (polariton like) resonator gap in the dispersion relation. The origin
and physical signifi... | 0506102v1 |
2006-05-19 | Coupled applications on distributed resources | Coupled models are set to become increasingly important in all aspects of
science and engineering as tools with which to study complex systems in an
integrated manner. Such coupled, hybrid simulations typically communicate data
between the component models of which they are comprised relatively
infrequently, and so a G... | 0605171v1 |
1998-01-23 | Transverse-mode coupling in a Kerr medium | We analyze nonlinear transverse mode coupling in a Kerr medium placed in an
optical cavity and its influence on bistability and different kinds of quantum
noise reduction. Even for an input beam that is perfectly matched to a cavity
mode, the nonlinear coupling produces an excess noise in the fluctuations of
the output... | 9801053v1 |
2004-03-31 | Effect of intersubsystem coupling on the geometric phase in a bipartite system | The influence of intersubsystem coupling on the cyclic adiabatic geometric
phase in bipartite systems is investigated. We examine the geometric phase
effects for two uniaxially coupled spin$-{1/2}$ particles, both driven by a
slowly rotating magnetic field. It is demonstrated that the relation between
the geometric pha... | 0403231v2 |
2004-07-07 | Quantum state transfer in imperfect artificial spin networks | High-fidelity quantum computation and quantum state transfer are possible in
short spin chains. We exploit a system based on a dispersive qubit-boson
interaction to mimic XY coupling. In this model, the usually assumed
nearest-neighbors coupling is no more valid: all the qubits are mutually
coupled. We analyze the perf... | 0407058v2 |
2005-03-08 | The Partition Function for the Anharmonic Oscillator in the Strong-Coupling Regime | We consider a single anharmonic oscillator with frequency $\omega$ and
coupling constant $\lambda$ respectively, in the strong-coupling regime. We are
assuming that the system is in thermal equilibrium with a reservoir at
temperature $\beta^{-1}$. Using the strong-coupling perturbative expansion, we
obtain the partitio... | 0503080v1 |
2005-10-20 | Overdamping by weakly coupled environments | A quantum system weakly interacting with a fast environment usually undergoes
a relaxation with complex frequencies whose imaginary parts are damping rates
quadratic in the coupling to the environment, in accord with Fermi's ``Golden
Rule''. We show for various models (spin damped by harmonic-oscillator or
random-matri... | 0510164v1 |
2006-05-01 | Nonlinear coupling of nano mechanical resonators to Josephson quantum circuits | We propose a technique to couple the position operator of a nano mechanical
resonator to a SQUID device by modulating its magnetic flux bias. By tuning the
magnetic field properly, either linear or quadratic couplings can be realized,
with a discretely adjustable coupling strength. This provides a way to realize
cohere... | 0605017v1 |
2007-03-22 | Controlled-NOT gate design for Josephson phase qubits with tunable inductive coupling: Weyl chamber steering and area theorem | Superconducting qubits with tunable coupling are ideally suited for fast and
accurate implementation of quantum logic. Here we present a simple approach,
based on Weyl chamber steering, to CNOT gate design for inductively coupled
phase qubits with tunable coupling strength g. In the presence of simultaneous
rf pulses o... | 0703208v1 |
1999-02-12 | A critical Ising model on the Labyrinth | A zero-field Ising model with ferromagnetic coupling constants on the
so-called Labyrinth tiling is investigated. Alternatively, this can be regarded
as an Ising model on a square lattice with a quasi-periodic distribution of up
to eight different coupling constants. The duality transformation on this
tiling is conside... | 9902009v1 |
2007-05-27 | Electromagnetic field quantization in an anisotropic and inhomogeneous magnetodielectric | The electromagnetic field in an anisotropic and inhomogeneous
magnetodielectric is quantized by modelling the medium with two independent
quantum fields. Some coupling tensors coupling the electromagnetic field with
the medium are introduced. Electric and magnetic polarizations are obtained in
terms of the ladder opera... | 0705.3942v1 |
2007-06-09 | Coupling of Optical Lumped Nanocircuit Elements and Effects of Substrates | We present here a model for the coupling among small nanoparticles excited by
an optical electric field in the framework of our optical lumped nanocircuit
theory [N. Engheta, A. Salandrino, and A. Alu Phys. Rev. Lett. 95, 095504
(2005)]. We derive how this coupling affects the corresponding nanocircuit
model by adding ... | 0706.1316v1 |
2007-06-15 | Electron-acoustic-phonon scattering and electron relaxation in two-coupled quantum rings | Electron relaxation, induced by acoustic phonons, is studied for coupled
quantum rings in the presence of external fields, both electric and magnetic.
We address the problem of a single electron in vertically coupled GaAs quantum
rings. Electron-phonon interaction is accounted for both deformation potential
and piezoel... | 0706.2352v1 |
2007-07-27 | Zero delay synchronization of chaos in coupled map lattices | We show that two coupled map lattices that are mutually coupled to one
another with a delay can display zero delay synchronization if they are driven
by a third coupled map lattice. We analytically estimate the parametric regimes
that lead to synchronization and show that the presence of mutual delays
enhances synchron... | 0707.4051v1 |
2007-08-31 | Continuation of solutions of coupled dynamical systems | Recently, the synchronization of coupled dynamical systems has been widely
studied. Synchronization is referred to as a process wherein two (or many)
dynamical systems are adjusted to a common behavior as time goes to infinity,
due to coupling or forcing. Therefore, before discussing synchronization, a
basic problem on... | 0708.4275v1 |
2007-09-22 | Interactions of Hermitian and non-Hermitian Hamiltonians | The coupling of non-Hermitian PT-symmetric Hamiltonians to standard Hermitian
Hamiltonians, each of which individually has a real energy spectrum, is
explored by means of a number of soluble models. It is found that in all cases
the energy remains real for small values of the coupling constant, but becomes
complex if t... | 0709.3605v1 |
2007-09-24 | Environmental Dependence of Masses and Coupling Constants | We construct a class of scalar field models coupled to matter that lead to
the dependence of masses and coupling constants on the ambient matter density.
Such models predict a deviation of couplings measured on the Earth from values
determined in low-density astrophysical environments, but do not necessarily
require th... | 0709.3825v3 |
2007-10-11 | Optical coupling of fundamental whispering gallery modes in bi-spheres | What will happen if two identical microspheres, with fundamental whispering
gallery modes excited in each of them, become optically coupled? Conventional
wisdom based on coupled-mode arguments says that two new modes, bonding and
anti-bonding, with two split frequencies would be formed. In this paper we
demonstrate, us... | 0710.2276v1 |
2007-11-19 | Critical Lattice Size Limit for Synchronized Chaotic State in 1-D and 2-D Diffusively Coupled Map Lattices | We consider diffusively coupled map lattices with $P$ neighbors (where $P$ is
arbitrary) and study the stability of synchronized state. We show that there
exists a critical lattice size beyond which the synchronized state is unstable.
This generalizes earlier results for nearest neighbor coupling. We confirm the
analyt... | 0711.2851v1 |
2008-02-19 | Coupled oscillators as models of quintom dark energy | We investigate quintom cosmology in FRW universes using isomorphic models
consisting of three coupled oscillators, one of which carries negative kinetic
energy. In particular, we examine the cosmological paradigms of
minimally-coupled massless quintom, of two conformally-coupled massive scalars
and of conformally-coupl... | 0802.2595v2 |
2008-03-14 | Kondo effect in quantum dots coupled to ferromagnetic leads with noncollinear magnetizations: effects due to electron-phonon coupling | Spin-polarized transport through a quantum dot strongly coupled to
ferromagnetic electrodes with non-collinear magnetic moments is analyzed
theoretically in terms of the non-equilibrium Green function formalism.
Electrons in the dot are assumed to be coupled to a phonon bath. The influence
of electron-phonon coupling o... | 0803.2152v1 |
2008-06-03 | Hyperbolicity of the Trace Map for the Weakly Coupled Fibonacci Hamiltonian | We consider the trace map associated with the Fibonacci Hamiltonian as a
diffeomorphism on the invariant surface associated with a given coupling
constant and prove that the non-wandering set of this map is hyperbolic if the
coupling is sufficiently small. As a consequence, for these values of the
coupling constant, th... | 0806.0645v1 |
2008-06-10 | Higher Order Periodic Solutions of Coupled phi4 Models | We obtain several higher order exact periodic solutions of (i) a coupled
symmetric phi4 model in an external field, (ii) an asymmetric coupled phi4
model, (iii) an asymmetric-symmetric coupled phi4 model, in terms of Lame
polynomials of order two and obtain the corresponding hyperbolic solutions in
the appropriate limi... | 0806.1564v1 |
2008-09-05 | Time-delayed feedback in neurosystems | The influence of time delay in systems of two coupled excitable neurons is
studied in the framework of the FitzHugh-Nagumo model. Time-delay can occur in
the coupling between neurons or in a self-feedback loop. The stochastic
synchronization of instantaneously coupled neurons under the influence of white
noise can be d... | 0809.1025v1 |
2008-10-17 | Non-minimal coupling in inflation and inflating with the Higgs boson | We analyse the effect of the non-minimal coupling of the form $\xi\phi^2R/2$
on the single field inflation. If the non-minimal coupling is large, it relaxes
the constraint on the field self coupling, making it possible to use the
Standard Model Higgs field as the inflaton. At the same time, even small
non-minimal coupl... | 0810.3165v1 |
2008-10-27 | Analysis of Firing Behaviors in Networks of Pulse-Coupled Oscillators with Delayed Excitatory Coupling | For networks of pulse-coupled oscillators with delayed excitatory coupling,
we analyze the firing behaviors depending on coupling strength and transmission
delay. The parameter space consisting of strength and delay is partitioned into
two regions. For one region, we derive a low bound of interspike intervals,
from whi... | 0810.4798v1 |
2008-11-21 | Conditions for synchronizability in arrays of coupled linear systems | Synchronization control in arrays of identical output-coupled continuous-time
linear systems is studied. Sufficiency of new conditions for the existence of a
synchronizing feedback law are analyzed. It is shown that for neutrally stable
systems that are detectable form their outputs, a linear feedback law exists
under ... | 0811.3530v1 |
2008-11-22 | Approximation of quantum graph vertex couplings by scaled Schrödinger operators on thin branched manifolds | We discuss approximations of vertex couplings of quantum graphs using
families of thin branched manifolds. We show that if a Neumann type Laplacian
on such manifolds is amended by suitable potentials, the resulting
Schr\"odinger operators can approximate non-trivial vertex couplings. The
latter include not only the del... | 0811.3707v1 |
2008-12-09 | Probe of anomalous neutrino couplings to W and Z in medium energy setup of a beta-beam facility | Capability of medium energy setup of a beta beam experiment to probe new
physics contributions to neutrino-W and neutrino-Z couplings are investigated.
We employ the effective lagrangian approach of Buchmuller and Wyler and obtain
95% confidence level limits on neutrino couplings to these gauge bosons without
assuming ... | 0812.1722v2 |
2009-02-18 | Scalar-tensor theories with pseudoscalar couplings | We consider the scalar-tensor theories of gravity extended by the
pseudoscalar couplings to matter and gauge fields and derive constraints on the
CP-odd combinations of scalar and pseudoscalar couplings from laboratory spin
precession experiments and from the evolution of photon polarization over
cosmological distances... | 0902.3217v1 |
2009-02-25 | A parallel splitting method for weakly coupled monotone inclusions | A parallel splitting method is proposed for solving systems of coupled
monotone inclusions in Hilbert spaces. Convergence is established for a wide
class of coupling schemes. Unlike classical alternating algorithms, which are
limited to two variables and linear coupling, our parallel method can handle an
arbitrary numb... | 0902.4415v1 |
2009-04-01 | Decay of Rabi oscillations by dipolar-coupled dynamical spin environments | We investigate the Rabi oscillations decay of a spin decohered by a spin bath
whose internal dynamics is caused by dipolar coupling between the bath spins.
The decay form and rate as a function of the intra-bath coupling is studied
analytically, and confirmed numerically. The decay in general has neither
exponential/Ga... | 0904.0263v1 |
2009-04-16 | Large $N_c$ Expansion and the Parity Violating $π, N, Δ$ Couplings | In the limit of large $N_c$ we first consider the $N_c$ ordering of the
various parity violating $\pi, N, \Delta$ couplings. Then we derive the
relations among these couplings and consistency relations from the stability of
these couplings under the chiral loop corrections with and without the mass
splitting between $N... | 0904.2418v1 |
2009-04-27 | Rigorous derivation of the Kinetic/Fluid coupling involving a Kinetic layer on a toy problem | In this article, we investigate the kinetic/fluid coupling on a toy model. We
obtain it rigorously from a hydrodynamical limit. The idea is that at the level
of the full kinetic model, the coupling is obvious. We then investigate the
coupling obtained when passing into the limit. We show that, especially in
presence of... | 0904.4199v1 |
2009-05-14 | Relaxation of Josephson qubits due to strong coupling to two-level systems | We investigate the energy relaxation (T1) process of a qubit coupled to a
bath of dissipative two-level fluctuators (TLF). We consider the fluctuators
strongly coupled to the qubit both in the limit of spectrally separated single
TLF's as well as in the limit of spectrally dense TLF's. We conclude that the
avoided leve... | 0905.2332v3 |
2009-05-19 | Hyperbolicity of the Trace Map for a Strongly Coupled Quasiperiodic Schrodinger Operator | We consider the trace map associated with the silver ratio Schrodinger
operator as a diffeomorphism on the invariant surface associated with a given
coupling constant and prove that the non-wandering set of this map is
hyperbolic if the coupling is sufficiently large. As a consequence, for this
values of the coupling c... | 0905.3082v1 |
2009-08-20 | Theory of anisotropic exchange in laterally coupled quantum dots | The effects of spin-orbit coupling on the two-electron spectra in lateral
coupled quantum dots are investigated analytically and numerically. It is
demonstrated that in the absence of magnetic field the exchange interaction is
practically unaffected by spin-orbit coupling, for any interdot coupling,
boosting prospects ... | 0908.2961v2 |
2009-09-13 | Co-coupled synchronization of fractional-order unified chaotic systems | Synchronization of fractional-order chaotic systems is a hot topic in the
field of nonlinear study. The co-coupled synchronization between two
fractional-order chaotic systems with different initial conditions is
investigated in this paper. Based on Lyapunov stability principle and
Gerschgorin theorem, the co-coupled s... | 0909.2410v1 |
2009-09-15 | Adaptive coupling for achieving stable synchronization of chaos | We consider synchronization of coupled chaotic systems and propose an
adaptive strategy that aims at evolving the strength of the coupling to achieve
stability of the synchronized evolution. We test this idea in a simple
configuration in which two chaotic systems are unidirectionally coupled (a
sender and a receiver) a... | 0909.2896v2 |
2009-11-16 | Exchange coupling in transition-metal nano-clusters on Cu(001) and Cu(111) surfaces | We present results of density-functional calculations on the magnetic
properties of Cr, Mn, Fe and Co nano-clusters (1 to 9 atoms large) supported on
Cu(001) and Cu(111). The inter-atomic exchange coupling is found to depend on
competing mechanisms, namely ferromagnetic double exchange and
antiferromagnetic kinetic exc... | 0911.3004v1 |
2009-11-16 | Quintessence with quadratic coupling to dark matter | We introduce a new form of coupling between dark energy and dark matter that
is quadratic in their energy densities. Then we investigate the background
dynamics when dark energy is in the form of exponential quintessence. The three
types of quadratic coupling all admit late-time accelerating critical points,
but these ... | 0911.3089v1 |
2010-01-13 | Strong and weak coupling of two coupled qubits | I investigate the dynamics and power spectrum of two coupled qubits
(two-level systems) under incoherent continuous pump and dissipation. New
regimes of strong coupling are identified, that are due to additional paths of
coherence flow in the system. Dressed states are reconstructed even in the
regime of strong decoher... | 1001.2201v1 |
2010-02-05 | An analytic Pade-motivated QCD coupling | We consider a modification of the Minimal Analytic (MA) coupling of Shirkov
and Solovtsov. This modified MA (mMA) coupling reflects the desired analytic
properties of the space-like observables. We show that an approximation by
Dirac deltas of its discontinuity function $\rho$ is equivalent to a Pad\'e
(rational) appro... | 1002.1264v1 |
2010-03-04 | Resonant coupling of a Bose-Einstein condensate to a micromechanical oscillator | We report experiments in which the vibrations of a micromechanical oscillator
are coupled to the motion of Bose-condensed atoms in a trap. The interaction
relies on surface forces experienced by the atoms at about one micrometer
distance from the mechanical structure. We observe resonant coupling to several
well-resolv... | 1003.1126v1 |
2010-04-09 | Superconducting Qubits Coupled to Torsional Resonators | We propose a scheme of strong and tunable coupling between a superconducting
phase qubit and nanomechanical torsional resonator. In our scheme the torsional
resonator directly modulates the largest energy scale (the Josephson coupling
energy) of the phase qubit, and the coupling strength is very large. We analyze
the q... | 1004.1497v2 |
2010-07-02 | Higher Derivative Brane Couplings from T-Duality | The Wess-Zumino coupling on D-branes in string theory is known to receive
higher derivative corrections which couple the Ramond-Ramond potential to terms
involving the square of the spacetime curvature tensor. Consistency with
T-duality implies that the branes should also have four-derivative couplings
that involve the... | 1007.0441v2 |
2010-09-22 | Coupling Circuit Resonators Among Themselves and To Nitrogen-Vacancy Centers in Diamond | We propose a scheme to couple NV centers in diamond through coplanar
waveguide resonators. The central conductor of the resonator is split into
several pieces which are coupled strongly with each other via simple capacitive
junctions or superconducting Josephson junctions. The NV centers are then put
at the junctions. ... | 1009.4314v2 |
2010-12-01 | Size dependent electric voltage-controlled magnetic anisotropy in multiferroic heterostructures: Interface-charge and strain co-mediated magnetoelectric coupling | We present a phenomenological scheme to study the size-dependent electric
voltage-controlled magnetic anisotropy in ferromagnetic (FM)/ferroelectric (FE)
heterostructures. The FM layers are either metallic Fe(001), Ni(001), Co(0001),
or half-metallic (La, Sr)MnO3 films. Two magnetoelectric mechanisms, i.e.,
interface-c... | 1012.0088v1 |
2010-12-17 | Holographic superconductor models in the non-minimal derivative coupling theory | We study a general class of holographic superconductor models via the
St\"{u}ckelberg mechanism in the non-minimal derivative coupling theory in
which the charged scalar field is kinetically coupling to Einstein's tensor. We
explore the effects of the coupling parameter on the critical temperature, the
order of phase t... | 1012.3820v1 |
2011-01-06 | All Possible Coupling Schemes in XY Spin Chains for Perfect State Transfer | We investigate quantum state transfer in XY spin chains and propose a
recursive procedure to construct the nonuniform couplings of these chains with
arbitrary length to achieve perfect state transfer(PST). We show that this
method is capable of finding all possible coupling schemes for PST. These
schemes, without exter... | 1101.1156v1 |
2011-02-24 | Spatially Coupled LDPC Codes for Decode-and-Forward in Erasure Relay Channel | We consider spatially-coupled protograph-based LDPC codes for the three
terminal erasure relay channel. It is observed that BP threshold value, the
maximal erasure probability of the channel for which decoding error probability
converges to zero, of spatially-coupled codes, in particular spatially-coupled
MacKay-Neal c... | 1102.5087v2 |
2011-03-17 | Heat transport and thermal rectification in quasi-one-dimensional systems | In this work we investigate heat conduction along a ladder-model conformed by
two coupled one dimensional lattices with different anharmonicity. We study how
the interchain coupling modifies the thermal properties of the isolated
systems. For a large enough coupling strength, we demonstrate that a harmonic
lattice inte... | 1103.3443v1 |
2011-03-31 | Emergent patterns in a spin-orbit coupled spin-2 Bose-Einstein condensate | The ground-state phases of a spin-orbit (SO) coupled atomic spin-2
Bose-Einstein condensate (BEC) are studied. Interesting density patterns
spontaneously formed are widespread due to the competition between SO coupling
and spin-dependent interactions like in a SO coupled spin-1 condensate. Unlike
the case of spin-1 con... | 1103.6074v1 |
2011-06-07 | Coupling of polaritons to vibrational modes of ultracold atoms in an optical lattice | The coupling of internal electronic excitations to vibrational modes of the
external motion of ultracold atoms in an optical lattice is studied here in
using a perturbation expansion in small atomic displacements. In the Mott
insulator case with one atom per site, the resonance dipole-dipole coupling
between neighborin... | 1106.1272v1 |
2011-07-23 | Electroweak effective couplings for future precision experiments | The leading hadronic effects in electroweak theory derive from vacuum
polarization which are non-perturbative hadronic contributions to the running
of the gauge couplings, the electromagnetic alpha_{em}(s) and the SU(2)_L
coupling alpha_2(s). I will report on my recent package "alphaQED", which
besides the effective fi... | 1107.4683v1 |
2011-09-09 | Covering relations for coupled map networks | Following [6,12], we study coupled map networks over arbitrary finite graphs.
An estimate from below for a topological entropy of a perturbed coupled map
network via a topological entropy of an unperturbed network by making use of
the covering relations for coupled map networks is obtained. The result is
quite general,... | 1109.1931v1 |
2011-09-09 | Standard Model gauge coupling unification | We study the low energy evolution of coupling constants of the standard model
and show that gauge coupling unification can be achieved at the electroweak
scale with a suitable normalization. We choose the grand unification group to
be the semidirect product of Spin(8) by S_3. In this case the three low energy
gauge cou... | 1109.2052v3 |
2011-09-12 | A note on the coupling of the techni-dilaton to the weak bosons | In this note, we study the coupling of the techni-dilaton to the weak bosons.
We consider two cases: (1) The dilaton directly couples to the weak bosons
similarly to the SM. (2) The coupling in question is effectively induced only
through the techni-fermion loops. In both cases, we find that the coupling is
essentially... | 1109.2554v3 |
2011-09-18 | A Coupling Argument for the Random Transposition Walk | This paper explores the mixing time of the random transposition walk on the
symmetric group. While it has long been known that this walk mixes in order
n*log(n) time, this result has not previously been attained using coupling. A
coupling argument showing the correct order mixing time is presented. This is
accomplished... | 1109.3915v1 |
2011-10-20 | Search for anomalous Wtb couplings in single top quark production in ppbar collisions at sqrt(s) = 1.96 TeV | We present new direct constraints on a general $Wtb$ interaction using data
corresponding to an integrated luminosity of 5.4 fb$^{-1}$ collected by the D0
detector at the Tevatron $p\bar{p}$ collider. The standard model provides a
purely left-handed vector coupling at the $Wtb$ vertex, while the most general,
lowest di... | 1110.4592v2 |
2012-02-16 | Ground state and excitation spectra of a strongly correlated lattice by the coupled cluster method | We apply Coupled Cluster Method to a strongly correlated lattice and develop
the Spectral Coupled Cluster equations by finding an approximation to the
resolvent operator, that gives the spectral response for an certain class of
probe operators. We apply the method to a $MnO_2$ plane model with a parameters
choice which... | 1202.3537v3 |
2012-02-29 | Dipole Coupling Effect of Holographic Fermion in Charged Dilatonic Gravity | In this note, we study the dipole coupling effect of holographic fermion in a
charged dilatonic black hole proposed by Gubser and Rocha (arXiv:0911.2898). It
is found that the property of Fermi liquid is rigid under perturbation of
dipole coupling, and the Fermi momentum is linearly shifted. A gap is
dynamically genera... | 1202.6539v1 |
2012-03-09 | Dynamical locality of the nonminimally coupled scalar field and enlarged algebra of Wick polynomials | We discuss dynamical locality in two locally covariant quantum field
theories, the nonminimally coupled scalar field and the enlarged algebra of
Wick polynomials. We calculate the relative Cauchy evolution of the enlarged
algebra, before demonstrating that dynamical locality holds in the nonminimally
coupled scalar fie... | 1203.2151v1 |
2012-07-11 | Enhancing Synchrony in Chaotic Oscillators by Dynamic Relaying | In a chain of mutually coupled oscillators, the coupling threshold for
synchronization between the outermost identical oscillators decreases when a
type of impurity (in terms of parameter mismatch) is introduced in the inner
oscillator(s). The outer oscillators interact indirectly via dynamic relaying,
mediated by the ... | 1207.2563v1 |
2012-08-29 | Radio-frequency spectroscopy of weakly bound molecules in spin-orbit coupled atomic Fermi gases | We investigate theoretically radio-frequency spectroscopy of weakly bound
molecules in an ultracold spin-orbit-coupled atomic Fermi gas. We consider two
cases with either equal Rashba and Dresselhaus coupling or pure Rashba
coupling. The former system has been realized very recently at Shanxi
University [Wang et al., a... | 1208.5841v1 |
2012-09-12 | Highly efficient coupling of photons from nanoemitters into single-mode optical fibers | Highly efficient coupling of photons from nanoemitters into single-mode
optical fibers is demonstrated using tapered fibers. 7.4 +/- 1.2 % of the total
emitted photons from single CdSe/ZnS nanocrystals were coupled into a
300-nm-diameter tapered fiber. The dependence of the coupling efficiency on the
taper diameter was... | 1209.2474v1 |
2012-10-01 | Electron-phonon superconductivity and charge density wave instability in the layered titanium-based pnictide BaTi$_2$Sb$_2$O | I present the results of first principles calculations of the phonon
dispersions and electron-phonon coupling for BaTi$_2$Sb$_2$O. The phonon
dispersions show a weak lattice instability near the zone corners that leads to
a charge-density wave phase. The calculations of the electron-phonon coupling
reveal strong coupli... | 1210.0499v2 |
2012-10-27 | Theory of electromechanical coupling in dynamical graphene | We study the coupling between mechanical motion and Dirac electrons in a
dynamical sheet of graphene. We show that this coupling can be understood in
terms of an effective gauge field acting on the electrons, which has two
contributions: quasistatic and purely dynamic of the Berry-phase origin. As is
well known, the st... | 1210.7384v1 |
2012-11-27 | Bootstrap and momentum transfer dependence in small x evolution equations | Using Monte Carlo integration techniques, we investigate running coupling
effects compatible with the high energy bootstrap condition to all orders in
the strong coupling in evolution equations valid at small values of Bjorken x
in deep inelastic scattering. A model for the running of the coupling with
analytic behavio... | 1211.6332v1 |
2012-12-04 | Selectable linear or quadratic coupling in an optomechanical system | There has been much interest recently in the analysis of optomechanical
systems incorporating dielectric nano- or microspheres inside a cavity field.
We analyse here the situation when one of the mirrors of the cavity itself is
also allowed to move. We reveal that the interplay between the two oscillators
yields a cros... | 1212.0641v1 |
2012-12-12 | Coupling mechanism between microscopic two-level system and superconducting qubits | We propose a scheme to clarify the coupling nature between superconducting
Josephson qubits andmicroscopic two-level systems. Although dominant interest
in studying two-level systems was in phase qubits previously, we find that the
sensitivity of the generally used spectral method in phase qubits is not
sufficient to e... | 1212.2687v1 |
2012-12-16 | Sensitivity enhancement in optical micro-tube resonator sensors via mode coupling | A liquid filled, low refractive index material inner-coated silica micro-tube
has been proposed and studied as a coupled micro-resonator sensor to greatly
enhance biochemical sensor sensitivity. Its unique coupling phenomenon has been
analyzed and utilized to boost the refractive index sensitivity of the device
to 967n... | 1212.3851v1 |
2013-01-24 | A Potential Theory of General Spatially-Coupled Systems via a Continuum Approximation | This paper analyzes general spatially-coupled (SC) systems with
multi-dimensional coupling. A continuum approximation is used to derive
potential functions that characterize the performance of the SC systems. For
any dimension of coupling, it is shown that, if the boundary of the SC systems
is fixed to the unique stabl... | 1301.5728v2 |
2013-02-03 | Invertible coupled KdV and coupled Harry Dym hierarchies | In this paper we discuss the conditions under which the coupled KdV and
coupled Harry Dym hierarchies possess inverse (negative) parts. We further
investigate the structure of nonlocal parts of tensor invariants of these
hierarchies, in particular, the nonlocal terms of vector fields, conserved
one-forms, recursion ope... | 1302.0526v1 |
2013-02-18 | Controlled coupling of photonic crystal cavities using photochromic tuning | We present a method to control the resonant coupling interaction in a
coupled-cavity photonic crystal molecule by using a local and reversible
photochromic tuning technique. We demonstrate the ability to tune both a
two-cavity and a three-cavity photonic crystal molecule through the resonance
condition by selectively t... | 1302.4322v1 |
2013-02-27 | Ferromagnetic to antiferromagnetic transition of one-dimensional spinor Bose gases with spin-orbit coupling | We have analytically solved one-dimensional interacting two-component bosonic
gases with spin-orbit (SO) coupling by the Bethe-ansatz method. Through a gauge
transformation, the effect of SO coupling is incorporated into a spin-dependent
twisted boundary condition. Our result shows that the SO coupling can influence
th... | 1302.6901v2 |
2013-03-15 | Exact black hole solution for scale dependent gravitational couplings and the corresponding coupling flow | We study a black hole solution for the generalized Einstein Hilbert action
with scale dependent couplings G(r) and Lambda(r). The form of the couplings is
not imposed, but rather deduced from the existence of a non trivial symmetrical
solution. A classical-like choice of the integration constants is found.
Finally, the... | 1303.3892v1 |
2013-04-12 | Probing Anomalous HZZ Couplings at the LHeC | We examine the sensitivity to the couplings of the Higgs boson to neutral
gauge bosons in a model independent way at the Large Hadron electron Collider
(LHeC). We have obtained the constraints on anomalous couplings for $HZZ$
vertex via the process $e^{-}p\rightarrow e^{-}HqX$. We find the accessible
limits of the anom... | 1304.3616v2 |
2013-04-29 | Coupled-channel scattering in 1+1 dimensional lattice model | Based on the Lippmann-Schwinger equation approach, a generalized L\"uscher's
formula in 1+1 dimensions for two particles scattering in both the elastic and
coupled-channel cases in moving frames is derived. A 2D coupled-channel
scattering lattice model is presented, the model represents a
two-coupled-channel resonant s... | 1304.7812v1 |
2013-05-08 | Physics at the ILC with focus mostly on Higgs physics | Physics at the ILC is reviewed focusing mostly on Higgs physics. It is
emphasized that at the ILC it is possible to measure the $hZZ$ coupling totally
model independently, which in turn allows model-independent normalization of
various branching ratio measurements and consequently the absolute measurements
of correspon... | 1305.1692v2 |
2013-05-26 | Nonlinearity Induced Critical Coupling | We study a critically coupled system (Opt. Lett., \textbf{32}, 1483 (2007))
with a Kerr-nonlinear spacer layer. Nonlinearity is shown to inhibit
null-scattering in a critically coupled system at low powers. However, a system
detuned from critical coupling can exhibit near-complete suppression of
scattering by means of ... | 1305.5983v1 |
2013-05-29 | Light scattering from coupled plasmonic nanospheres on a substrate | An efficient numerical method based on half-space Green function and
spherical harmonics expansion is used to study the light scattering from
coupled multiple nanospheres on a substrate. The ellipsometric spectra for
various geometries of coupled Au nanospheres are calculated and analyzed to
realize the effects of plas... | 1305.6764v1 |
2013-12-11 | Spin-orbit coupling in quantum gases | Spin-orbit coupling links a particle's velocity to its quantum mechanical
spin, and is essential in numerous condensed matter phenomena, including
topological insulators and Majorana fermions. In solid-state materials,
spin-orbit coupling originates from the movement of electrons in a crystal's
intrinsic electric field... | 1312.3292v1 |
2014-01-10 | Delay-induced patterns in a two-dimensional lattice of coupled oscillators | We show how a variety of stable spatio-temporal periodic patterns can be
created in 2D-lattices of coupled oscillators with non-homogeneous coupling
delays. A "hybrid dispersion relation" is introduced, which allows studying the
stability of time-periodic patterns analytically in the limit of large delay.
The results a... | 1401.2325v1 |
2014-01-09 | Coherent Electronic Coupling in Atomically Thin MoSe2 | We report the first direct spectroscopic evidence for coherent electronic
coupling between excitons and trions in atomically thin transition metal
dichalcogenides, specifically monolayer MoSe2. Signatures of coupling appear as
isolated cross-peaks in two-color pump-probe spectra, and the lineshape of the
peaks reveals ... | 1401.2909v1 |
2014-01-24 | Properties of spatial coupling in compressed sensing | In this paper we address a series of open questions about the construction of
spatially coupled measurement matrices in compressed sensing. For hardware
implementations one is forced to depart from the limiting regime of parameters
in which the proofs of the so-called threshold saturation work. We investigate
quantitat... | 1401.6380v1 |
2014-02-03 | Coupling constants of bottom (charmed) mesons with pion from three point QCD sum rules | In this article, the three point QCD sum rules is used to compute the strong
coupling constants of vertices containing the strange bottomed ( charmed )
mesons with pion. The coupling constants are calculated, when both the bottom (
charm ) and pion states are off-shell. A comparison of the obtained results of
coupling ... | 1402.0296v1 |
2014-02-06 | Dynamics and non-equilibrium steady state in a system of coupled harmonic oscillators | A system of two coupled oscillators, each of them coupled to an independent
reservoir, is analysed. The analytical solution of the non-rotating wave master
equation is obtained in the high-temperature and weak coupling limits. No
thermal entanglement is found in the high-temperature limit. In the weak
coupling limit th... | 1402.1477v1 |
2014-04-01 | Optimal rectification by strongly coupled spins | We study heat transport in a pair of strongly coupled spins. In particular,
we present a condition for optimal rectification, i.e., flow of heat in one
direction and complete isolation in the opposite direction. We show that the
strong-coupling formalism is necessary for correctly describing heat flow in a
wide range o... | 1404.0348v2 |
2014-04-14 | From inflation to late time acceleration with a decaying vacuum coupled to radiation or matter | We consider General Relativity with matter and radiation, one of these fluids
being coupled to vacuum. We find that Universe dynamics starts by an inflation
phase if the coupled fluid has a negative energy density at early time. Then,
there is always a finite scale factor singularity but when vacuum and matter
are coup... | 1404.3518v1 |
2014-07-15 | Quantum model of coupled intersubband plasmons | We present a quantum model to calculate the dipole-dipole coupling between
electronic excitations in the conduction band of semiconductor quantum wells.
We demonstrate that the coupling depends on a characteristic length, related to
the overlap between microscopic current densities associated with each
electronic excit... | 1407.3923v1 |
2014-07-22 | Current-driven dynamics of coupled domain walls in a synthetic antiferromagnet | We develop the theory of magnetic domain wall motion in coupled double-layer
systems where electrons can hop between the layers giving rise to an
antiferromagnetic coupling. We demonstrate that the force from the interlayer
coupling drives the walls and the effect of the extrinsic pinning is greatly
reduced if the doma... | 1407.5805v1 |
2014-07-30 | Stability of the shadow projection and the left-curtain coupling | The (left-)curtain coupling, introduced by Beiglb\"ock and the author is an
extreme element of the set of "martingale" couplings between two real
probability measures in convex order. It enjoys remarkable properties with
respect to order relations and a minimisation problem inspired by the theory of
optimal transport. ... | 1407.8009v2 |
2014-09-27 | Complete achromatic optical switching between two waveguides with a sign flip of the phase mismatch | We present a two-waveguide coupler which, realizes complete achromatic
all-optical switching. The coupling of the waveguides has a hyperbolic-secant
shape while the phase mismatch has a sign flip at the maximum of the coupling.
We derive an analytic solution for the electric field propagation using coupled
mode theory ... | 1409.7757v1 |
2014-10-19 | Monotonicity of Avoidance Coupling on $K_N$ | Answering a question by Angel, Holroyd, Martin, Wilson and Winkler, we show
that the maximal number of non-colliding coupled simple random walks on the
complete graph $K_N$, which take turns, moving one at a time, is monotone in
$N$. We use this fact to couple $\lceil \frac N4 \rceil$ such walks on $K_N$,
improving the... | 1410.5032v2 |
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