publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2016-10-28 | Damping-free collective oscillations of a driven two-component Bose gas in optical lattices | We explore quantum many-body physics of a driven Bose-Einstein condensate in
optical lattices. The laser field induces a gap in the generalized Bogoliubov
spectrum proportional to the effective Rabi frequency. The lowest lying modes
in a driven condensate are characterized by zero group velocity and non-zero
current. T... | 1610.09076v5 |
2016-11-02 | An extension of Bakhvalov's theorem for systems of conservation laws with damping | For $2\X2$ systems of conservation laws satisfying Bakhvalov conditions, we
present a class of damping terms that still yield the existence of global
solutions with periodic initial data of possibly large bounded total variation
per period. We also address the question of the decay of the periodic solution.
As applicat... | 1611.00698v1 |
2016-11-15 | The damped stochastic wave equation on p.c.f. fractals | A p.c.f. fractal with a regular harmonic structure admits an associated
Dirichlet form, which is itself associated with a Laplacian. This Laplacian
enables us to give an analogue of the damped stochastic wave equation on the
fractal. We show that a unique function-valued solution exists, which has an
explicit formulati... | 1611.04874v3 |
2016-11-29 | Phase mixing importance for both Landau instability and damping | We discuss the self-consistent dynamics of plasmas by means of hamiltonian
formalism for a system of $N$ near-resonant electrons interacting with a single
Langmuir wave. The connection with the Vlasov description is revisited through
the numerical calculation of the van Kampen-like eigenfrequencies of the
linearized dy... | 1611.09596v3 |
2016-11-29 | Dark matter annihilation and jet quenching phenomena in the early universe | Dark-matter particles like neutralinos should decouple from the hot cosmic
plasma at temperatures of about 40 GeV. Later they can annihilate each other
into standard-model particles, which are injected into the dense primordial
plasma and quickly loose energy. This process is similar to jet quenching in
ultrarelativist... | 1611.09662v1 |
2016-11-30 | Perspective on the cosmic-ray electron spectrum above TeV | The AMS-02 has measured the cosmic ray electron (plus positron) spectrum up
to ~TeV with an unprecedent precision. The spectrum can be well described by a
power law without any obvious features above 10 GeV. The satellite instrument
Dark Matter Particle Explorer (DAMPE), which was launched a year ago, will
measure the ... | 1611.10292v1 |
2016-12-01 | Field- and damping-like spin-transfer torque in magnetic multilayers | We investigate the spin-transfer torque in a magnetic multilayer structure by
means of a spin-diffusion model. The torque in the considered system,
consisting of two magnetic layers separated by a conducting layer, is caused by
a perpendicular-to-plane current. We compute the strength of the field-like and
the damping-... | 1612.00194v1 |
2016-12-04 | Vector Approximate Message Passing for the Generalized Linear Model | The generalized linear model (GLM), where a random vector $\boldsymbol{x}$ is
observed through a noisy, possibly nonlinear, function of a linear transform
output $\boldsymbol{z}=\boldsymbol{Ax}$, arises in a range of applications such
as robust regression, binary classification, quantized compressed sensing,
phase retr... | 1612.01186v1 |
2016-12-06 | Quantum Dynamics of Skyrmions in Chiral Magnets | We study the quantum propagation of a Skyrmion in chiral magnetic insulators
by generalizing the micromagnetic equations of motion to a finite-temperature
path integral formalism, using field theoretic tools. Promoting the center of
the Skyrmion to a dynamic quantity, the fluctuations around the Skyrmionic
configuratio... | 1612.01885v2 |
2016-12-06 | Increased low-temperature damping in yttrium iron garnet thin films | We report measurements of the frequency and temperature dependence of
ferromagnetic resonance (FMR) for a 15-nm-thick yttrium iron garnet (YIG) film
grown by off-axis sputtering. Although the FMR linewidth is narrow at room
temperature (corresponding to a damping coefficient $\alpha$ = (9.0 $\pm$ 0.2)
$\times 10^{-4}$)... | 1612.01954v1 |
2016-12-09 | Slow motion for one-dimensional nonlinear damped hyperbolic Allen-Cahn systems | We consider a nonlinear damped hyperbolic reaction-diffusion system in a
bounded interval of the real line with homogeneous Neumann boundary conditions
and we study the metastable dynamics of the solutions. Using an "energy
approach" introduced by Bronsard and Kohn [CPAM 1990] to study slow motion for
Allen-Cahn equati... | 1612.03203v5 |
2016-12-18 | Entropically Damped Artificial Compressibility for SPH | In this paper, the Entropically Damped Artificial Compressibility (EDAC)
formulation of Clausen (2013) is used in the context of the Smoothed Particle
Hydrodynamics (SPH) method for the simulation of incompressible fluids.
Traditionally, weakly-compressible SPH (WCSPH) formulations have employed
artificial compressibli... | 1612.05901v2 |
2016-12-19 | Kinetic-simulation study of propagation of Langmuir-like ionic waves in dusty plasma | The propagation of ionic perturbations in a dusty plasma is considered
through a three-species kinetic simulation approach, in which the temporal
evolution of all three elements i.e. electrons, ions and dust particles are
followed based on the Vlasov equation coupled with the Poisson equation. Two
cases are focused upo... | 1612.06182v1 |
2016-12-21 | Environment generated quantum correlations in bipartite qubit-qutrit systems | The dynamics of entanglement and quantum discord for qubit-qutrit systems are
studied in the presence of phase damping and amplitude damping noises. Both one
way and two couplings of the marginal systems with the environments are
considered. Entanglement sudden death is unavoidable under any setup, however,
the require... | 1612.06981v1 |
2016-12-28 | Stretching and Kibble scaling regimes for Hubble-damped defect networks | The cosmological evolution of topological defect networks can broadly be
divided into two stages. At early times they are friction-dominated due to
particle scattering and therefore non-relativistic, and may either be
conformally stretched or evolve in the Kibble regime. At late times they are
relativistic and evolve i... | 1612.08863v1 |
2016-12-29 | Laser Pulse Compression Using Magnetized Plasmas | Proposals to reach the next generation of laser intensities through Raman or
Brillouin backscattering have centered on optical frequencies. Higher
frequencies are beyond the range of such methods mainly due to the wave damping
that accompanies the higher density plasmas necessary for compressing higher
frequency lasers... | 1612.09214v1 |
2017-01-05 | Liquid-like thermal conduction in a crystalline solid | A solid conducts heat through both transverse and longitudinal acoustic
phonons, but a liquid employs only longitudinal vibrations. Here, we report
that the crystalline solid AgCrSe2 has liquid-like thermal conduction. In this
compound, Ag atoms exhibit a dynamic duality that they are exclusively involved
in intense lo... | 1701.01192v1 |
2017-01-09 | Oscillations and damping in the fractional Maxwell materials | This paper examines the oscillatory behaviour of complex viscoelastic systems
with power law-like relaxation behaviour. Specifically, we use the fractional
Maxwell model, consisting of a spring and fractional dashpot in series, which
produces a power-law creep behaviour and a relaxation law following the
Mittag-Leffler... | 1701.02155v2 |
2017-01-11 | Localization in finite asymmetric vibro-impact chains | We explore the dynamics of strongly localized periodic solutions (discrete
solitons, or discrete breathers) in a finite one-dimensional chain of
asymmetric vibro-impact oscillators. The model involves a parabolic on-site
potential with asymmetric rigid constraints (the displacement domain of each
particle is finite), a... | 1701.03055v1 |
2017-01-13 | Characterizing Fluid and Kinetic Instabilities using Field-Particle Correlations on Single-Point Time Series | A recently proposed technique correlating electric fields and particle
velocity distributions is applied to single-point time series extracted from
linearly unstable, electrostatic numerical simulations. The form of the
correlation, which measures the transfer of phase-space energy density between
the electric field an... | 1701.03687v1 |
2017-01-17 | Backward Raman Amplification in the Long-wavelength Infrared | The wealth of work in backward Raman amplification in plasma has focused on
the extreme intensity limit, however backward Raman amplification may also
provide an effective and practical mechanism for generating intense, broad
bandwidth, long-wavelength infrared radiation (LWIR). An electromagnetic
simulation coupled wi... | 1701.04879v2 |
2017-02-14 | Electron-nuclear coherent spin oscillations probed by spin dependent recombination | We demonstrate the detection of coherent electron-nuclear spin oscillations
related to the hyperfine interaction and revealed by the band-to-band
photoluminescence (PL) in zero external magnetic field. On the base of a
pump-probe PL experiment we measure, directly in the temporal domain, the
hyperfine constant of an el... | 1702.04129v1 |
2017-02-14 | Calibrating damping rates with LEGACY linewidths | Linear damping rates of radial oscillation modes in selected $Kepler$ stars
are estimated with the help of a nonadiabatic stability analysis. The
convective fluxes are obtained from a nonlocal, time-dependent convection
model. The mixing-length parameter is calibrated to the surface-convection-zone
depth of a stellar m... | 1702.04251v1 |
2017-02-20 | Resonant Scattering Characteristics of Homogeneous Dielectric Sphere | In the present article the classical problem of electromagnetic scattering by
a single homogeneous sphere is revisited. Main focus is the study of the
scattering behavior as a function of the material contrast and the size
parameters for all electric and magnetic resonances of a dielectric sphere.
Specifically, the Pad... | 1702.05883v1 |
2017-02-22 | A Retrofitting-based Supplementary Controller Design for Enhancing Damping Performance of Wind Power Systems | In this paper we address the growing concerns of wind power integration from
the perspective of power system dynamics and stability. We propose a new
retrofit control technique where an additional controller is designed at the
doubly-fed induction generator site inside the wind power plant. This
controller cancels the ... | 1702.06695v1 |
2017-02-23 | Plasmon modes of bilayer molybdenum disulfide: A density functional study | We explore the collective electronic excitations of bilayer molybdenum
disulfide (MoS$_2$) using the density functional theory together with the
random phase approximation. The many-body dielectric function and electron
energy-loss spectra are calculated using an {\it ab initio} based model
involving material-realistic... | 1702.07170v2 |
2017-02-25 | Low-energy photoelectron transmission through aerosol overlayers | The transmission of low-energy (<1.8eV) photoelectrons through the shell of
core-shell aerosol particles is studied for liquid squalane, squalene, and DEHS
shells. The photoelectrons are exclusively formed in the core of the particles
by two-photon ionization. The total photoelectron yield recorded as a function
of she... | 1702.07865v1 |
2017-02-26 | Magnon-photon coupling in antiferromagnets | Magnon-photon coupling in antiferromagnets has many attractive features that
do not exist in ferro- or ferrimagnets. We show quantum-mechanically that, in
the absence of an external field, one of the two degenerated spin wave bands
couples with photons while the other does not. The photon mode anticrosses with
the coup... | 1702.07977v1 |
2017-03-03 | Global behaviour of bistable solutions for hyperbolic gradient systems in one unbounded spatial dimension | This paper is concerned with damped hyperbolic gradient systems of the form
\[ \alpha u_{tt} + u_t = -\nabla V(u) + u_{xx}\,, \] where the spatial domain
is the whole real line, the state variable $u$ is multidimensional, $\alpha$ is
a positive quantity, and the potential $V$ is coercive at infinity. For such
systems, ... | 1703.01221v2 |
2017-03-06 | Polynomial Stabilization of Solutions to a Class of Damped Wave Equations | We consider a class of wave equations of the type $\partial_{tt} u + Lu +
B\partial_{t} u = 0$, with a self-adjoint operator $L$, and various types of
local damping represented by $B$. By establishing appropriate and raher precise
estimates on the resolvent of an associated operator $A$ on the imaginary axis
of ${{\Bbb... | 1703.01735v1 |
2017-03-08 | System-Theoretic Performance Metrics for Low-Inertia Stability of Power Networks | As bulk synchronous generators in the power grid are replaced by distributed
generation interfaced through power electronics, inertia is removed from the
system, prompting concerns over grid stability. Different metrics are available
for quantifying grid stability and performance; however, no theoretical results
are av... | 1703.02646v1 |
2017-03-20 | A quantum correlated twin atom laser from a Bose-Hubbard system | We propose and evaluate a method to construct a quantum correlated twin atom
laser using a pumped and damped Bose-Hubbard inline trimer which can operate in
a stationary regime. With pumping via a source condensate filling the middle
well and damping using either an electron beam or optical means at the two end
wells, ... | 1703.06607v2 |
2017-03-20 | Non-universal velocity probability densities in two-dimensional turbulence: the effect of large-scale dissipation | We show that some statistical properties of forced two-dimensional turbulence
have an important sensitivity to the form of large-scale dissipation which is
required to damp the inverse cascade. We consider three models of large-scale
dissipation: linear "Ekman" drag, non-linear quadratic drag, and scale
selective hypo-... | 1703.07000v1 |
2017-03-21 | Numerical Range and Quadratic Numerical Range for Damped Systems | We prove new enclosures for the spectrum of non-selfadjoint operator matrices
associated with second order linear differential equations $\ddot{z}(t) + D
\dot{z} (t) + A_0 z(t) = 0$ in a Hilbert space. Our main tool is the quadratic
numerical range for which we establish the spectral inclusion property under
weak assum... | 1703.07447v1 |
2017-03-22 | Kinetic simulations of ladder climbing by electron plasma waves | The energy of plasma waves can be moved up and down the spectrum using
chirped modulations of plasma parameters, which can be driven by external
fields. Depending on whether the wave spectrum is discrete (bounded plasma) or
continuous (boundless plasma), this phenomenon is called ladder climbing (LC)
or autoresonant ac... | 1703.07694v1 |
2017-03-22 | New versions of Newton method: step-size choice, convergence domain and under-determined equations | Newton method is one of the most powerful methods for finding solutions of
nonlinear equations and for proving their existence. In its "pure" form it has
fast convergence near the solution, but small convergence domain. On the other
hand damped Newton method has slower convergence rate, but weaker conditions on
the ini... | 1703.07810v2 |
2017-03-30 | Study of spin pumping in Co thin film vis-a-vis seed and capping layer using ferromagnetic resonance spectroscopy | We investigated the dependence of the seed [Ta/Pt, Ta/Au] and capping [Pt/Ta,
Au/Ta] layers on spin pumping effect in the ferromagnetic 3 nm thick Co thin
film using ferromagnetic resonance spectroscopy. The data is fitted with Kittel
equation to evaluate damping constant and g-factor. A strong dependence of seed
and c... | 1703.10630v1 |
2017-04-03 | Sensing Coherent Phonons with Two-photon Interference | Detecting coherent phonons pose different challenges compared to coherent
photons due to the much stronger interaction between phonons and matter. This
is especially true for high frequency heat carrying phonons, which are
intrinsic lattice vibrations experiencing many decoherence events with the
environment, and are t... | 1704.00446v1 |
2017-04-03 | Simulating spin-boson models with trapped ions | We propose a method to simulate the dynamics of spin-boson models with small
crystals of trapped ions where the electronic degree of freedom of one ion is
used to encode the spin while the collective vibrational degrees of freedom are
employed to form an effective harmonic environment. The key idea of our
approach is t... | 1704.00629v1 |
2017-04-07 | Coherent-induced state ordering with fixed mixedness | In this paper, we study coherence-induced state ordering with Tsallis
relative entropy of coherence, relative entropy of coherence and $l_{1}$ norm
of coherence. Firstly, we show that these measures give the same ordering for
single-qubit states with a fixed mixedness or a fixed length along the
direction $\sigma_{z}$.... | 1704.02244v1 |
2017-04-13 | A possible connection between the spin temperature of damped Lyman-alpha absorption systems and star formation history | We present a comprehensive analysis of the spin temperature/covering factor
degeneracy, T/f, in damped Lyman-alpha absorption systems. By normalising the
upper limits and including these via a survival analysis, there is, as
previously claimed, an apparent increase in T/f with redshift at z > 1.
However, when we accoun... | 1704.04294v2 |
2017-04-17 | Magnetic field line random walk in two-dimensional dynamical turbulence | The field line random walk (FLRW) of magnetic turbulence is one of the
important topics in plasma physics and astrophysics. In this article by using
the field line tracing method mean square displacements (MSD) of FLRW is
calculated in all possible length scales for pure two-dimensional turbulence
with damping dynamica... | 1704.05059v3 |
2017-04-19 | Quantum simulation of quantum channels in nuclear magnetic resonance | We propose and experimentally demonstrate an efficient framework for the
quantum simulation of quantum channels in NMR. Our approach relies on the
suitable decomposition of non-unitary operators in a linear combination of $d$
unitary ones, which can be then experimentally implemented with the assistance
of a number of ... | 1704.05593v2 |
2017-04-24 | Beating the Classical Limits of Information Transmission using a Quantum Decoder | Encoding schemes and error-correcting codes are widely used in information
technology to improve the reliability of data transmission over real-world
communication channels. Quantum information protocols can further enhance the
performance in data transmission by encoding a message in quantum states,
however, most prop... | 1704.07036v2 |
2017-04-24 | Quasilinear diffusion coefficients in a finite Larmor radius expansion for ion cyclotron heated plasmas | In this paper, a reduced model of quasilinear diffusion by a small Larmor
radius approximation is derived to couple the Maxwell's equations and the
Fokker-Planck equation self-consistently for ion cyclotron range of frequency
waves in a tokamak. The reduced model ensures the important properties of the
full model by Ke... | 1704.07283v1 |
2017-04-27 | Chirality-induced Antisymmetry in Magnetic Domain-Wall Speed | In chiral magnetic materials, numerous intriguing phenomena such as built in
chiral magnetic domain walls (DWs) and skyrmions are generated by the
Dzyaloshinskii Moriya interaction (DMI). The DMI also results in asymmetric DW
speed under in plane magnetic field, which provides a useful scheme to measure
the DMI strengt... | 1704.08751v1 |
2017-05-02 | The response of a Unruh-deWitt particle detector in a thin-shell wormhole spacetime | We investigate the transition probability of a Unruh-deWitt particle detector
evolving in flat space and in a wormhole spacetime, in various scenarios. In
Minkowski space, we look at the response of the detector on trajectories having
discontinuities and rapid variations, as well as the effect of finite-time
coupling. ... | 1705.00890v1 |
2017-05-04 | Phase-space mixing in dynamically unstable, integrable few-mode quantum systems | Quenches in isolated quantum systems are currently a subject of intense
study. Here, we consider quantum few-mode systems that are integrable in their
classical mean-field limit and become dynamically unstable after a quench of a
system parameter. Specifically, we study a Bose-Einstein condensate (BEC) in a
double-well... | 1705.01702v1 |
2017-05-11 | Quantum Correlations and Bell Inequality Violation under Decoherence | Quantum Correlations are studied extensively in quantum information domain.
Entanglement Measures and Quantum Discord are good examples of these actively
studied correlations. Detection of violation in Bell inequalities is also a
widely active area in quantum information theory world. In this work, we
revisit the probl... | 1705.03882v2 |
2017-05-18 | Local and global existence of solutions to a strongly damped wave equation of the $p$-Laplacian type | This article focuses on a quasilinear wave equation of $p$-Laplacian type: $$
u_{tt} - \Delta_p u - \Delta u_t=0$$ in a bounded domain
$\Omega\subset\mathbb{R}^3$ with a sufficiently smooth boundary
$\Gamma=\partial\Omega$ subject to a generalized Robin boundary condition
featuring boundary damping and a nonlinear sour... | 1705.06696v2 |
2017-05-21 | Plasmon modes in graphene-GaAs heterostructures | We investigate the plasmon dispersion relation and damping rate of collective
excitations in a double-layer system consisting of bilayer graphene and GaAs
quantum well, separated by a distance, at zero temperature with no interlayer
tunneling. We use the random-phase-approximation dielectric function and take
into acco... | 1705.07389v1 |
2017-05-23 | Unifying description of the damping regimes of a stochastic particle in a periodic potential | We analyze the classical problem of the stochastic dynamics of a particle
confined in a periodic potential, through the so called Il'in and Khasminskii
model, with a novel semi-analytical approach. Our approach gives access to the
transient and the asymptotic dynamics in all damping regimes, which are
difficult to inve... | 1705.08083v2 |
2017-05-27 | Experimental Observation of Electron-Acoustic Wave Propagation in Laboratory Plasma | In the field of fundamental plasma waves, direct observation of
electron-acoustic wave (EAW) propagation in laboratory plasmas remains a
challenging problem, mainly because of heavy damping. In the MaPLE device, the
wave is observed and seen to propagate with phase velocity $\sim1.8$ times the
electron thermal velocity... | 1705.09806v1 |
2017-06-08 | Superconductivity around nematic quantum critical point in two-dimensional metals | We study the properties of $s$-wave superconductivity induced around a
nematic quantum critical point in two-dimensional metals. The strong Landau
damping and the Cooper pairing between incoherent fermions have dramatic mutual
influence on each other, and hence should be treated on an equal footing. This
problem is add... | 1706.02583v2 |
2017-06-16 | Simulation of non-Pauli Channels | We consider the simulation of a quantum channel by two parties who share a
resource state and may apply local operations assisted by classical
communication (LOCC). One specific type of such LOCC is standard teleportation,
which is however limited to the simulation of Pauli channels. Here we show how
we can easily enla... | 1706.05384v2 |
2017-06-17 | \emph{Ab initio} calculation of spin-orbit coupling for NV center in diamond exhibiting dynamic Jahn-Teller effect | Point defects in solids may realize solid state quantum bits. The spin-orbit
coupling in these point defects plays a key role in the magneto-optical
properties that determine the conditions of quantum bit operation. However,
experimental data and methods do not directly yield this highly important data,
particularly, f... | 1706.05523v2 |
2017-06-20 | Decoherence induced spin squeezing signatures in Greenberger-Horne-Zeilinger and W states | We reckon the behaviour of spin squeezing in tripartite unsqueezed maximally
entangled Green- berger-Horne-Zeilinger (GHZ) and W states under various
decoherence channels with Kitagawa- Ueda (KU) criteria. In order to search spin
squeezing sudden death (SSSD) and signatures of spin squeezing production we
use bit flip,... | 1706.06273v2 |
2017-06-22 | Adaptive recurrence quantum entanglement distillation for two-Kraus-operator channels | Quantum entanglement serves as a valuable resource for many important quantum
operations. A pair of entangled qubits can be shared between two agents by
first preparing a maximally entangled qubit pair at one agent, and then sending
one of the qubits to the other agent through a quantum channel. In this
process, the de... | 1706.07461v1 |
2017-06-26 | Landau Damping of Beam Instabilities by Electron Lenses | Modern and future particle accelerators employ increasingly higher intensity
and brighter beams of charged particles and become operationally limited by
coherent beam instabilities. Usual methods to control the instabilities, such
as octupole magnets, beam feedback dampers and use of chromatic effects, become
less effe... | 1706.08477v1 |
2017-07-01 | Amending entanglement-breaking channels via intermediate unitary operations | We report a bulk optics experiment demonstrating the possibility of restoring
the entanglement distribution through noisy quantum channels by inserting a
suitable unitary operation (filter) in the middle of the transmission process.
We focus on two relevant classes of single-qubit channels consisting in
repeated applic... | 1707.00161v1 |
2017-06-30 | Damped oscillations of the energy of a bosonic bath due to spectral gaps and special initial correlations | The energy of the bosonic bath and the flow of quantum information are
analyzed over short and long times in local dephasing channels for special
correlated or factorized initial conditions, respectively, which involve
thermal states. The continuous distribution of frequency modes of the bosonic
bath exhibits a spectra... | 1707.00604v1 |
2017-07-11 | Andreev reflection assisted lasing in an electromagnetic resonator coupled to a hybrid-quantum-dot | A single mode electromagnetic resonator coupled to a two-level
hybrid-quantum-dot(hQD) is studied theoretically as a laser(maser), when the
hQD is driven out of equilibrium with external applied d.c. bias voltage. Using
the formalism of the non-equilibrium Green's functions for the hQD and the
semi-classical laser equa... | 1707.03219v2 |
2017-07-13 | The sharp estimate of the lifespan for the semilinear wave equation with time-dependent damping | We consider the following semilinear wave equation with time-dependent
damping. \begin{align} \tag{NLDW} \left\{ \begin{array}{ll} \partial_t^2 u -
\Delta u + b(t)\partial_t u = |u|^{p}, & (t,x) \in [0,T) \times \mathbb{R}^n,
\\ u(0,x)=\varepsilon u_0(x), u_t(0,x)=\varepsilon u_1(x), & x \in
\mathbb{R}^n, \end{array} \... | 1707.03950v1 |
2017-07-17 | Candidate dust structures for starlight polarization | Rotation damping and alignment are discussed as prerequisites for
polarization power. An expression is derived from first principles, for the
damping time of the rotation of a particle in a magnetic field, under the
Faraday braking torque, provided its electrical properties are known. This
makes it possible to describe... | 1707.05247v1 |
2017-07-21 | Quasinormal ringing of black holes in Einstein aether theory | The gravitational consequence of local Lorentz violation (LV) should show
itself in derivation of the characteristic quasinormal ringing of black hole
mergers from their general relativity case. In this paper, we study quasinormal
modes (QNMs) of the scalar and electromagnetic field perturbations to Einstein
aether bla... | 1707.06747v2 |
2017-07-24 | Self-concordant inclusions: A unified framework for path-following generalized Newton-type algorithms | We study a class of monotone inclusions called "self-concordant inclusion"
which covers three fundamental convex optimization formulations as special
cases. We develop a new generalized Newton-type framework to solve this
inclusion. Our framework subsumes three schemes: full-step, damped-step and
path-following methods... | 1707.07403v1 |
2017-07-28 | Finding stability domains and escape rates in kicked Hamiltonians | We use an effective Hamiltonian to characterize particle dynamics and find
escape rates in a periodically kicked Hamiltonian. We study a model of
particles in storage rings that is described by a chaotic symplectic map.
Ignoring the resonances, the dynamics typically has a finite region in phase
space where it is stabl... | 1707.09336v1 |
2017-07-29 | Empirical Bayes approaches to PageRank type algorithms for rating scientific journals | Following criticisms against the journal Impact Factor, new journal influence
scores have been developed such as the Eigenfactor or the Prestige Scimago
Journal Rank. They are based on PageRank type algorithms on the cross-citations
transition matrix of the citing-cited network. The PageRank algorithm performs
a smooth... | 1707.09508v2 |
2017-08-02 | Global existence of solutions for semi-linear wave equation with scale-invariant damping and mass in exponentially weighted spaces | In this paper we consider the following Cauchy problem for the semi-linear
wave equation with scale-invariant dissipation and mass and power
non-linearity: \begin{align}\label{CP abstract} \begin{cases} u_{tt}-\Delta
u+\dfrac{\mu_1}{1+t} u_t+\dfrac{\mu_2^2}{(1+t)^2}u=|u|^p, \\ u(0,x)=u_0(x),
\,\, u_t(0,x)=u_1(x), \end{... | 1708.00738v1 |
2017-08-09 | Stable and unstable roots of ion temperature gradient driven mode using curvature modified plasma dispersion functions | Basic, local kinetic theory of ion temperature gradient driven (ITG) mode,
with adiabatic electrons is reconsidered. Standard unstable, purely oscillating
as well as damped solutions of the local dispersion relation are obtained using
a bracketing technique that uses the argument principle. This method requires
computi... | 1708.03026v1 |
2017-08-11 | On the Small Mass Limit of Quantum Brownian Motion with Inhomogeneous Damping and Diffusion | We study the small mass limit (or: the Smoluchowski-Kramers limit) of a class
of quantum Brownian motions with inhomogeneous damping and diffusion. For Ohmic
bath spectral density with a Lorentz-Drude cutoff, we derive the
Heisenberg-Langevin equations for the particle's observables using a quantum
stochastic calculus ... | 1708.03685v1 |
2017-08-13 | Observation of Spin Superfluidity in a Bose Gas Mixture | The spin dynamics of a harmonically trapped Bose-Einstein condensed binary
mixture of sodium atoms is experimentally investigated at finite temperature.
In the collisional regime the motion of the thermal component is shown to be
damped because of spin drag, while the two condensates exhibit a counter flow
oscillation ... | 1708.03923v2 |
2017-08-16 | Multi-component plasmons in monolayer MoS$_2$ with circularly polarized optical pumping | By making use of circularly polarized light and electrostatic gating,
monolayer molybdenum disulfide (ML-MoS$_2$) can form a platform supporting
multiple types of charge carriers. They can be discriminated by their spin,
valley index or whether they're electrons or holes. We investigate the
collective properties of tho... | 1708.04940v1 |
2017-08-17 | Viscous forces and bulk viscoelasticity near jamming | When weakly jammed packings of soft, viscous, non-Brownian spheres are probed
mechanically, they respond with a complex admixture of elastic and viscous
effects. While many of these effects are understood for specific, approximate
models of the particles' interactions, there are a number of proposed force
laws in the l... | 1708.05241v2 |
2017-08-21 | Diverging, but negligible power at Carnot efficiency: theory and experiment | We discuss the possibility of reaching the Carnot efficiency by heat engines
(HEs) out of quasi-static conditions at nonzero power output. We focus on
several models widely used to describe the performance of actual HEs. These
models comprise quantum thermoelectric devices, linear irreversible HEs,
minimally nonlinear ... | 1708.06261v4 |
2017-08-21 | Solar Line Asymmetries: Modelling the Effect of Granulation on the Solar Spectrum | A parametric model of granulation employing a small number of parameters was
developed. Synthetic spectra calculated using this model closely match observed
spectra and, in particular, reproduce the asymmetries observed in spectral
lines. Both the microturbulent motions and the large-scale flow velocity
decrease expone... | 1708.06408v1 |
2017-08-24 | The influence of small-scale magnetic field on the evolution of inclination angle and precession damping in the framework of 3-component model of neutron star | The evolution of inclination angle and precession damping of radio pulsars is
considered. It is assumed that the neutron star consists of 3 "freely" rotating
components: the crust and two core components, one of which contains pinned
superfluid vortices. We suppose that each component rotates as a rigid body.
Also the ... | 1708.07505v1 |
2017-08-25 | On the ultimate energy bound of solutions to some forced second order evolution equations with a general nonlinear damping operator | Under suitable growth and coercivity conditions on the nonlinear damping
operator $g$ which ensure non-resonance, we estimate the ultimate bound of the
energy of the general solution to the equation $\ddot{u}(t) + Au(t) +
g(\dot{u}(t))=h(t),\quad t\in\mathbb{R}^+ ,$ where $A$ is a positive
selfadjoint operator on a Hil... | 1708.07639v1 |
2017-08-25 | On annihilation of the relativistic electron vortex pair in collisionless plasmas | In contrast to hydrodynamic vortices, vortices in plasma contain an electric
current circulating around the center of the vortex, which generates a magnetic
field localized inside. Using computer simulations, we demonstrate that the
magnetic field associated with the vortex gives rise to a mechanism of
dissipation of t... | 1708.07803v2 |
2017-08-30 | Finite-temperature behavior of the Bose polaron | We consider a mobile impurity immersed in a Bose gas at finite temperature.
Using perturbation theory valid for weak coupling between the impurity and the
bosons, we derive analytical results for the energy and damping of the impurity
for low and high temperatures, as well as for temperatures close to the
critical temp... | 1708.09172v2 |
2017-09-01 | Quantum reservoir engineering through quadratic optomechanical interaction in the reversed dissipation regime | We explore the electromagnetic field coupled to a mechanical resonator via
quadratic optomechanical interaction in the reversed dissipation regime where
the mechanical damping rate is much larger than the cavity field dissipation
rate. It is shown that in this regime, the cavity field effectively acquires an
additional... | 1709.00279v1 |
2017-09-13 | Life-span of solutions to semilinear wave equation with time-dependent critical damping for specially localized initial data | This paper is concerned with the blowup phenomena for initial value problem
of semilinear wave equation with critical time-dependent damping term (DW). The
result is the sharp upper bound of lifespan of solution with respect to the
small parameter $\ep$ when $p_F(N)\leq p\leq p_0(N+\mu)$, where $p_F(N)$
denotes the Fuj... | 1709.04406v1 |
2017-09-18 | Optimal Energy Growth in Current Sheets | In this paper, we investigate the possibility of transient growth in the
linear perturbation of current sheets. The resistive magnetohydrodynamic (MHD)
operator for a background field consisting of a current sheet is non-normal,
meaning that associated eigenvalues and eigenmodes can be very sensitive to
perturbation. I... | 1709.05858v1 |
2017-09-20 | Spin-rotation mode in a quantum Hall ferromagnet | A spin-rotation mode emerging in a quantum Hall ferromagnet due to laser
pulse excitation is studied. This state, macroscopically representing a
rotation of the entire electron spin-system to a certain angle, is not
microscopically equivalent to a coherent turn of all spins as a single-whole
and is presented in the for... | 1709.06811v2 |
2017-09-22 | Muon spin rotation study of the topological superconductor SrxBi2Se3 | We report transverse-field (TF) muon spin rotation experiments on single
crystals of the topological superconductor Sr$_x$Bi$_2$Se$_3$ with nominal
concentrations $x=0.15$ and $0.18$ ($T_c \sim 3$ K). The TF spectra ($B= 10$
mT), measured after cooling to below $T_c$ in field, did not show any
additional damping of the... | 1709.07547v1 |
2017-09-22 | Slowly damped quasinormal modes of the massive Dirac field in d-dimensional Tangherlini spacetime | We consider quasinormal modes of the massive Dirac field in the background of
a Schwarzschild- Tangherlini black hole. Different dimensions of the spacetime
are considered, from d = 4 to d = 9. The quasinormal modes are calculated using
two independent methods: WKB and continued fraction. We obtain the spectrum of
quas... | 1709.07864v3 |
2017-09-20 | Non-Adiabatic Vibrational Damping of Molecular Adsorbates: Insights into Electronic Friction and the Role of Electronic Coherence | We present a perturbation approach rooted in time-dependent
density-functional theory to calculate electron hole (eh)-pair excitation
spectra during the non-adiabatic vibrational damping of adsorbates on metal
surfaces. Our analysis for the benchmark systems CO on Cu(100) and Pt(111)
elucidates the surprisingly strong ... | 1709.08003v1 |
2017-09-28 | Phenomenological model for predicting stationary and non-stationary spectra of wave turbulence in vibrating plates | A phenomenological model describing the time-frequency dependence of the
power spectrum of thin plates vibrating in a wave turbulence regime, is
introduced. The model equation contains as basic solutions the Rayleigh-Jeans
equipartition of energy, as well as the Kolmogorov-Zakharov spectrum of wave
turbulence. In the W... | 1709.09884v1 |
2017-09-13 | Effects of pressure on suspended micromechanical membrane arrays | The effects of pressure on micromechanical air-filled cavities made by a pair
of suspended, parallel silicon nitride membranes are investigated in the free
molecular and quasi-molecular regimes. Variations of the fundamental drummode
mechanical resonant frequencies and damping with air pressure are determined by
means ... | 1710.00043v2 |
2017-10-11 | Parametric Decay Instability and Dissipation of Low-frequency Alfvén Waves in Low-beta Turbulent Plasmas | Evolution of the parametric decay instability (PDI) of a circularly polarized
Aflv\'en wave in a turbulent low-beta plasma background is investigated using
3D hybrid simulations. It is shown that the turbulence reduces the growth rate
of PDI as compared to the linear theory predictions, but PDI can still exist.
Interes... | 1710.04149v3 |
2017-10-14 | Doubly Damped Stochastic Parallel Translations and Hessian Formulas | We study the Hessian of the solutions of time-independent Schr\"odinger
equations, aiming to obtain as large a class as possible of complete Riemannian
manifolds for which the estimate $C(\frac 1 t +\frac {d^2}{t^2})$ holds. For
this purpose we introduce the doubly damped stochastic parallel transport
equation, study t... | 1710.05169v1 |
2017-10-20 | Magnetic field amplification in supernova remnants | Based on the new findings on the turbulent dynamo in \citet{XL16}, we examine
the magnetic field amplification in the context of supernova remnants. Due to
the strong ion-neutral collisional damping in the weakly-ionized interstellar
medium, the dynamo in the preshock turbulence remains in the damping kinematic
regime,... | 1710.07717v1 |
2017-10-26 | Coarse-graining in the derivation of Markovian master equations and its significance in quantum thermodynamics | The coarse-graining approach to deriving the quantum Markovian master
equation is revisited, with close attention given to the underlying
approximations. It is further argued that the time interval over which the
coarse-graining is performed is a free parameter that can be given a physical
measurement-based interpretat... | 1710.09939v2 |
2017-10-27 | The Marangoni effect on small-amplitude capillary waves in viscous fluids | We derive a general integrodifferential equation for the transient behaviour
of small-amplitude capillary waves on the planar surface of a viscous fluid in
the presence of the Marangoni effect. The equation is solved for an insoluble
surfactant solution in concentration below the critical micelle concentration
(cmc) un... | 1710.10137v1 |
2017-11-01 | Plasmon modes in bilayer-monolayer graphene heterostructures | We investigate the dispersion relation and damping of plasmon modes in a
bilayer-monolayer graphene heterostructure with carrier densities and at zero
temperature within the random-phase-approximation taking into account the
nonhomogeneity of the dielectric background of the system. We derive analytical
expressions for... | 1711.00334v1 |
2017-11-03 | Remark on upper bound for lifespan of solutions to semilinear evolution equations in a two-dimensional exterior domain | In this paper we consider the initial-boundary value problem for the heat,
damped wave, complex-Ginzburg-Landau and Schr"odinger equations with the power
type nonlinearity $|u|^p$ with $p in (1,2]$ in a two-dimensional exterior
domain. Remark that $2=1+2/N$ is well-known as the Fujita exponent. If $p>2$,
then there exi... | 1711.00994v1 |
2017-11-03 | A flowing pair of particles in inertial microfluidics | A flowing pair of particles in inertial microfluidics gives important
insights into understanding and controlling the collective dynamics of
particles like cells or droplets in microfluidic devices. They are applied in
medical cell analysis and engineering. We study the dynamics of a pair of solid
particles flowing thr... | 1711.01148v2 |
2017-11-07 | Application of the coupled classical oscillators model to the Fano resonance build-up in a plasmonic nanosystem | We study the excitation dynamics of Fano resonance within the classical model
framework of two linear coupled oscillators. An exact solution for the model
with a damped harmonic force is obtained. The details of growth a Fano profile
under the harmonic excitation is shown. For incident ultra-wideband pulse, the
reactio... | 1711.02498v2 |
2017-11-11 | Quantum Thermodynamics for Driven Dissipative Bosonic Systems | We investigate two prototypical dissipative bosonic systems under slow
driving and arbitrary system-bath coupling strength, recovering their dynamic
evolution as well as the heat and work rates, and we verify that thermodynamic
laws are respected. Specifically, we look at the damped harmonic oscillator and
the damped t... | 1711.04077v1 |
2017-11-29 | Constraints on box-shaped cosmic ray electron feature from dark matter annihilation with the AMS-02 and DAMPE data | Precise measurements of spectra of cosmic ray electrons and positrons can
effectively probe the nature of dark matter (DM) particles. In a class of
models where DM particles initially annihilate into a pair of intermediate
particles which then decay into standard model particles, box-shaped spectra
can be generated. Su... | 1711.11052v2 |
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