publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2016-08-03 | Ultra-Low Dissipation Superfluid Micromechanical Resonator | Micro and nanomechanical resonators with ultra-low dissipation have great
potential as useful quantum resources. The superfluid micromechanical
resonators presented here possess several advantageous characteristics:
straightforward thermalization, dissipationless flow, and in situ tunability.
We identify and quantitati... | 1608.01380v1 |
2016-08-14 | A second order dynamical system with Hessian-driven damping and penalty term associated to variational inequalities | We consider the minimization of a convex objective function subject to the
set of minima of another convex function, under the assumption that both
functions are twice continuously differentiable. We approach this optimization
problem from a continuous perspective by means of a second order dynamical
system with Hessia... | 1608.04137v1 |
2016-08-15 | Power requirements for cosmic ray propagation models involving diffusive reacceleration; estimates and implications for the damping of interstellar turbulence | We make quantitative estimates of the power supplied to the Galactic cosmic
ray population by second-order Fermi acceleration in the interstellar medium,
or as it is usually termed in cosmic ray propagation studies, diffusive
reacceleration. Using recent results on the local interstellar spectrum from
the Voyager missi... | 1608.04227v2 |
2016-09-01 | Observation of oscillatory radial electric field relaxation in a helical plasma | Measurements of the relaxation of a zonal electrostatic potential
perturbation in a non-axisymmetric magnetically confined plasma are presented.
A sudden perturbation of the plasma equilibrium is induced by the injection of
a cryogenic hydrogen pellet in the TJ-II stellarator, which is observed to be
followed by a damp... | 1609.00281v1 |
2016-09-10 | Stochastic Sampling for Structural Topology Optimization with Many Load Cases: Density-Based and Ground Structure Approaches | We propose an efficient probabilistic method to solve a deterministic problem
-- we present a randomized optimization approach that drastically reduces the
enormous computational cost of optimizing designs under many load cases for
both continuum and truss topology optimization. Practical structural designs by
topology... | 1609.03099v1 |
2016-09-15 | Low-damping sub-10-nm thin films of lutetium iron garnet grown by molecular-beam epitaxy | We analyze the structural and magnetic characteristics of (111)-oriented
lutetium iron garnet (Lu$_3$Fe$_5$O$_{12}$) films grown by molecular-beam
epitaxy, for films as thin as 2.8 nm. Thickness-dependent measurements of the
in- and out-of-plane ferromagnetic resonance allow us to quantify the effects
of two-magnon sca... | 1609.04753v1 |
2016-09-18 | Inertia effects in the real-time dynamics of a quantum spin coupled to a Fermi sea | Spin dynamics in the Kondo impurity model, initiated by suddenly switching
the direction of a local magnetic field, is studied by means of the
time-dependent density-matrix renormalization group. Quantum effects are
identified by systematic computations for different spin quantum numbers $S$
and by comparing with tight... | 1609.05526v1 |
2016-09-21 | Force sensitivity of multilayer graphene optomechanical devices | Mechanical resonators based on low-dimensional materials are promising for
force and mass sensing experiments. The force sensitivity in these ultra-light
resonators is often limited by the imprecision in the measurement of the
vibrations, the fluctuations of the mechanical resonant frequency, and the
heating induced by... | 1609.06517v1 |
2016-09-26 | Ferromagnetic resonance study of composite Co/Ni - FeCoB free layers with perpendicular anisotropy | We study the properties of composite free layers with perpendicular
anisotropy. The free layers are made of a soft FeCoB layer ferromagnetically
coupled by a variable spacer (Ta, W, Mo) to a very anisotropic [Co/Ni]
multilayer embodied in a magnetic tunnel junction meant for spin torque memory
applications. For this we... | 1609.07863v1 |
2016-10-03 | Inertia and universality of avalanche statistics: The case of slowly deformed amorphous solids | By means of a finite elements technique we solve numerically the dynamics of
an amorphous solid under deformation in the quasistatic driving limit. We study
the noise statistics of the stress-strain signal in the steady state plastic
flow, focusing on systems with low internal dissipation. We analyze the
distributions ... | 1610.00533v2 |
2016-10-04 | Statistical properties of damped Lyman-alpha systems from Sloan Digital Sky Survey DR12 | We present new estimates for the statistical properties of damped
Lyman-$\alpha$ absorbers (DLAs). We compute the column density distribution
function at $z>2$, the line density, $\mathrm{d}N/\mathrm{d}X$, and the neutral
hydrogen density, $\Omega_\mathrm{DLA}$. Our estimates are derived from the DLA
catalogue of Garne... | 1610.01165v2 |
2016-10-05 | Higher-Harmonic Collective Modes in a Trapped Gas from Second-Order Hydrodynamics | Utilizing a second-order hydrodynamics formalism, the dispersion relations
for the frequencies and damping rates of collective oscillations as well as
spatial structure of these modes up to the decapole oscillation in both two-
and three- dimensional gas geometries are calculated. In addition to
higher-order modes, the... | 1610.01611v2 |
2016-10-10 | Robust force sensing for a free particle in a dissipative optomechanical system with a parametric amplifier | We theoretically investigate optical detection of a weak classical force
acting on a free particle in a dissipative coupling optomechanical system with
a degenerate parametric amplifier (PA). We show that the PA allows one to
achieve the force sensitivity far better than the standard quantum limit (SQL)
over a broad ra... | 1610.02761v2 |
2016-10-12 | Stabilization of the Gear-Grimshaw system with weak damping | The aim of this work is to consider the internal stabilization of a nonlinear
coupled system of two Korteweg--de Vries equations in a finite interval under
the effect of a very weak localized damping. The system was introduced by Gear
and Grimshaw to model the interactions of two-dimensional, long, internal
gravity wav... | 1610.03829v4 |
2016-10-14 | Nambu mechanics for stochastic magnetization dynamics | The Landau-Lifshitz-Gilbert (LLG) equation describes the dynamics of a damped
magnetization vector that can be understood as a generalization of Larmor spin
precession. The LLG equation cannot be deduced from the Hamiltonian framework,
by introducing a coupling to a usual bath, but requires the introduction of
addition... | 1610.04598v2 |
2016-10-19 | Heavy-tailed response of structural systems subjected to stochastic excitation containing extreme forcing events | We characterize the complex, heavy-tailed probability distribution functions
(pdf) describing the response and its local extrema for structural systems
subjected to random forcing that includes extreme events. Our approach is based
on the recent probabilistic decomposition-synthesis technique, where we
decouple rare ev... | 1610.06110v3 |
2016-10-27 | Thermally activated phase slips of one-dimensional Bose gases in shallow optical lattices | We study the decay of superflow via thermally activated phase slips in
one-dimensional Bose gases in a shallow optical lattice. By using the Kramers
formula, we numerically calculate the nucleation rate of a thermally activated
phase slip for various values of the filling factor and flow velocity in the
absence of a ha... | 1610.08982v3 |
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 |
2017-01-11 | The Cauchy problem for the Landau-Lifshitz-Gilbert equation in BMO and self-similar solutions | We prove a global well-posedness result for the Landau-Lifshitz equation with
Gilbert damping provided that the BMO semi-norm of the initial data is small.
As a consequence, we deduce the existence of self-similar solutions in any
dimension. In the one-dimensional case, we characterize the self-similar
solutions associ... | 1701.03083v2 |
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 |
2017-01-27 | Structural scale $q-$derivative and the LLG-Equation in a scenario with fractionality | In the present contribution, we study the Landau-Lifshitz-Gilbert equation
with two versions of structural derivatives recently proposed: the scale
$q-$derivative in the non-extensive statistical mechanics and the axiomatic
metric derivative, which presents Mittag-Leffler functions as eigenfunctions.
The use of structu... | 1701.08076v2 |
2017-01-31 | Lack of correlation between the spin mixing conductance and the ISHE-generated voltages in CoFeB/Pt,Ta bilayers | We investigate spin pumping phenomena in polycrystalline CoFeB/Pt and
CoFeB/Ta bilayers and the correlation between the effective spin mixing
conductance $g^{\uparrow\downarrow}_{\rm eff}$ and the obtained voltages
generated by the spin-to-charge current conversion via the inverse spin Hall
effect in the Pt and Ta laye... | 1701.09110v1 |
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 |
2017-03-20 | 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 |
2017-04-03 | 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 |
2017-05-04 | 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 |
2017-05-23 | 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 |
2017-08-09 | 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 |
2017-08-13 | 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 |
2017-08-24 | 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 |
2017-09-12 | Green's function formalism for spin transport in metal-insulator-metal heterostructures | We develop a Green's function formalism for spin transport through
heterostructures that contain metallic leads and insulating ferromagnets. While
this formalism in principle allows for the inclusion of various magnonic
interactions, we focus on Gilbert damping. As an application, we consider
ballistic spin transport b... | 1709.03775v1 |
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 |
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