publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
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 |
2017-11-03 | 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 |
2017-11-30 | TeV dark matter and the DAMPE electron excess | The recent high energy electron and positron flux observed by the DAMPE
experiment indicates possible excess events near 1.4 TeV. Such an excess may be
evidence of dark matter annihilations or decays in a dark matter subhalo that
is located close to the solar system. We give here an analysis of this excess
from annihil... | 1711.11579v1 |
2017-12-04 | Quasi-degenerate dark matter for DAMPE excess and $3.5\,\textrm{keV}$ line | We propose a quasi-degenerate dark matter scenario to simultaneously explain
the $1.4\,\textrm{TeV}$ peak in the high-energy cosmic-ray electron-positron
spectrum reported by the DAMPE collaboration very recently and the
$3.5\,\textrm{keV}$ X-ray line observed in galaxies clusters and from the
Galactic centre and confi... | 1712.00922v1 |
2017-12-06 | Collective modes of an imbalanced unitary Fermi gas | We study theoretically the collective mode spectrum of a strongly imbalanced
two-component unitary Fermi gas in a cigar-shaped trap, where the minority
species forms a gas of polarons. We describe the collective breathing mode of
the gas in terms of the Fermi liquid kinetic equation taking collisions into
account using... | 1712.02181v1 |
2017-12-07 | Bias of Damped Lyman-$α$ systems from their cross-correlation with CMB lensing | We cross-correlate the positions of damped Lyman-$\alpha$ systems (DLAs) and
their parent quasar catalog with a convergence map derived from the Planck
cosmic microwave background (CMB) temperature data. We make consistent
measurements of the lensing signal of both samples in both Fourier and
configuration space. By in... | 1712.02738v2 |
2017-12-08 | Viscoelastic optical nonlocality of low-loss epsilon-near-zero nanofilms | Optical nonlocalities are elusive and hardly observable in traditional
plasmonic materials like noble and alkali metals. Here we report experimental
observation of viscoelastic nonlocalities in the infrared optical response of
doped cadmium-oxide, epsilon-near-zero nanofilms. The nonlocality is detectable
thanks to the... | 1712.03169v2 |
2017-12-08 | A Strong Test of the Dark Matter Origin of the 1.4 TeV DAMPE Signal Using IceCube Neutrinos | A tentative excess in the electron spectrum at 1.4 TeV was recently reported
by the DArk Matter Particle Explorer (DAMPE). A non-astrophysical scenario in
which dark matter particles annihilate or decay in a local clump has been
invoked to explain the excess. If $e^\pm$ annihilation channels in the final
states are med... | 1712.03210v2 |
2017-12-11 | Prospects of type-II seesaw at future colliders in light of the DAMPE $e^+ e^-$ excess | The DAMPE $e^+ e^-$ excess at around 1.4 TeV could be explained in the
type-II seesaw model with a scalar dark mater $D$ which is stabilized by a
discrete $Z_2$ symmetry. The simplest scenario is the annihilation $DD \to
H^{++} H^{--}$ followed by the subsequent decay $H^{\pm\pm} \to e^\pm e^\pm$,
with both the DM and ... | 1712.03642v3 |
2017-12-12 | Thermal decoherence in a strongly correlated Bose liquid | We compute the single particle spectral function of a Bose liquid on a
lattice, at integer filling, close to the superfluid-Mott transition. We use a
`static path approximation' that retains all the classical thermal fluctuations
in the problem, and a real space implementation of the random phase
approximation (RPA) fo... | 1712.04433v1 |
2017-12-17 | Oscillation energy based sensitivity analysis and control for multi-mode oscillation systems | This paper describes a novel approach to analyze and control systems with
multi-mode oscillation problems. Traditional single dominant mode analysis
fails to provide effective control actions when several modes have similar low
damping ratios. This work addresses this problem by considering all modes in
the formulation... | 1712.06157v1 |
2017-12-19 | Nonequilibrium quantum solvation with a time-dependent Onsager cavity | We formulate a theory of nonequilibrium quantum solvation in which parameters
of the solvent are explicitly depending on time. We assume in a simplest
approach a spherical molecular Onsager cavity with a time-dependent radius. We
analyze the relaxation properties of a test molecular point dipole in a
dielectric solvent... | 1712.06973v2 |
2017-12-26 | Newton's equation of motion with quadratic drag force and Toda's potential as a solvable one | The family of exactly solvable potentials for Newton's equation of motion in
the one-dimensional system with quadratic drag force has been determined
completely. The determination is based on the implicit inverse-function
solution valid for any potential shape, and hence exhaustive. This solvable
family includes the ex... | 1712.09189v4 |
2017-12-23 | Density Fluctuations in the Solar Wind Driven by Alfvén Wave Parametric Decay | Measurements and simulations of inertial compressive turbulence in the solar
wind are characterized by anti-correlated magnetic fluctuations parallel to the
mean field and density structures. This signature has been interpreted as
observational evidence for non-propagating pressure balanced structures (PBS),
kinetic io... | 1712.09336v2 |
2018-01-15 | A radiative neutrino mass model in light of DAMPE excess with hidden gauged $U(1)$ symmetry | We propose a one-loop induced neutrino mass model with hidden $U(1)$ gauge
symmetry, in which we successfully involve a bosonic dark matter (DM) candidate
propagating inside a loop diagram in neutrino mass generation to explain the
$e^+e^-$ excess recently reported by the DArk Matter Particle Explorer (DAMPE)
experimen... | 1801.04729v2 |
2018-01-22 | A port-Hamiltonian approach to the control of nonholonomic systems | In this paper a method of controlling nonholonomic systems within the
port-Hamiltonian (pH) framework is presented. It is well known that
nonholonomic systems can be represented as pH systems without Lagrange
multipliers by considering a reduced momentum space. Here, we revisit the
modelling of these systems for the pu... | 1801.06954v1 |
2018-01-23 | Temperature gradient driven heat flux closure in fluid simulations of collisionless reconnection | Recent efforts to include kinetic effects in fluid simulations of plasmas
have been very promising. Concerning collisionless magnetic reconnection, it
has been found before that damping of the pressure tensor to isotropy leads to
good agreement with kinetic runs in certain scenarios. An accurate
representation of kinet... | 1801.07628v1 |
2018-01-29 | Oscillatory relaxation of zonal flows in a multi-species stellarator plasma | The low frequency oscillatory relaxation of zonal potential perturbations is
studied numerically in the TJ-II stellarator (where it was experimentally
detected for the first time). It is studied in full global gyrokinetic
simulations of multi-species plasmas. The oscillation frequency obtained is
compared with predicti... | 1801.09495v1 |
2018-01-30 | Input / Output Stability of a Damped String Equation coupled with Ordinary Differential System | The input/output stability of an interconnected system composed of an
ordinary differential equation and a damped string equation is studied. Issued
from the literature on time-delay systems, an exact stability result is firstly
derived using pole locations. Then, based on the Small-Gain theorem and on the
Quadratic Se... | 1801.09916v2 |
2018-02-05 | Intrinsic spin-orbit torque arising from Berry curvature in metallic-magnet/Cu-oxide interface | We report the observation of the intrinsic damping-like spin-orbit torque
(SOT) arising from the Berry curvature in metallic-magnet/CuO$_x$
heterostructures. We show that a robust damping-like SOT, an order of magnitude
larger than a field-like SOT, is generated in the heterostructure despite the
absence of the bulk sp... | 1802.01285v2 |
2018-02-12 | Selective Phonon Damping in Topological Semimetals | Topological semimetals are characterized by their intriguing Fermi surfaces
(FSs) such as Weyl and Dirac points, or nodal FS, and their associated surface
states. Among them, topological crystalline semimetals, in the presence of
strong spin-orbit coupling, possess a nodal FS protected by non-symmorphic
lattice symmetr... | 1802.04300v2 |
2018-02-14 | Motion of interfaces for a damped hyperbolic Allen-Cahn equation | Consider the Allen-Cahn equation $u_t=\varepsilon^2\Delta u-F'(u)$, where $F$
is a double well potential with wells of equal depth, located at $\pm1$. There
are a lot of papers devoted to the study of the limiting behavior of the
solutions as the diffusion coefficient $\varepsilon\to0^+$, and it is well
known that, if ... | 1802.05038v1 |
2018-02-23 | Blow up of solutions for semilinear wave equations with noneffective damping | In this paper, we study the finite-time blow up of solutions to the following
semilinear wave equation with time-dependent damping \[ \partial_t^2u-\Delta
u+\frac{\mu}{1+t}\partial_tu=|u|^p \] in $\mathbb{R}_{+}\times\mathbb{R}^n$.
More precisely, for $0\leq\mu\leq 2,\mu \neq1$ and $n\geq 2$, there is no
global solutio... | 1802.08403v2 |
2018-03-04 | Optimization of Time-Resolved Magneto-optical Kerr Effect Signals for Magnetization Dynamics Measurements | Recently magnetic storage and magnetic memory have shifted towards the use of
magnetic thin films with perpendicular magnetic anisotropy (PMA). Understanding
the magnetic damping in these materials is crucial, but normal Ferromagnetic
Resonance (FMR) measurements face some limitations. The desire to quantify the
dampin... | 1803.01280v2 |
2018-03-06 | A comparison of semi-Lagrangian discontinuous Galerkin and spline based Vlasov solvers in four dimensions | The purpose of the present paper is to compare two semi-Lagrangian methods in
the context of the four-dimensional Vlasov--Poisson equation. More
specifically, our goal is to compare the performance of the more recently
developed semi-Lagrangian discontinuous Galerkin scheme with the de facto
standard in Eulerian Vlasov... | 1803.02143v1 |
2018-03-06 | Kak's three-stage protocol of secure quantum communication revisited: Hitherto unknown strengths and weaknesses of the protocol | Kak's three-stage protocol for quantum key distribution is revisited with
special focus on its hitherto unknown strengths and weaknesses. It is shown
that this protocol can be used for secure direct quantum communication.
Further, the implementability of this protocol in the realistic situation is
analyzed by consideri... | 1803.02157v1 |
2018-03-09 | Dynamical evolutions in non-Hermitian triple-well system with complex potential | We investigate the dynamical properties for non-Hermitian triple-well system
with a loss in the middle well. When chemical potentials in two end wells are
uniform and nonlinear interactions are neglected, there always exists a dark
state, whose eigenenergy becomes zero, and the projections onto which do not
change over... | 1803.03360v1 |
2018-03-11 | Graph Laplacian Spectrum and Primary Frequency Regulation | We present a framework based on spectral graph theory that captures the
interplay among network topology, system inertia, and generator and load
damping in determining the overall grid behavior and performance. Specifically,
we show that the impact of network topology on a power system can be quantified
through the net... | 1803.03905v3 |
2018-03-15 | Control Inversion: A Clustering-Based Method for Distributed Wide-Area Control of Power Systems | Wide-area control (WAC) has been shown to be an effective tool for damping
low-frequency oscillations in power systems. In the current state of art, WAC
is challenged by two main factors - namely, scalability of design and
complexity of implementation. In this paper we present a control design called
control inversion ... | 1803.05947v1 |
2018-03-18 | Damped Anderson acceleration with restarts and monotonicity control for accelerating EM and EM-like algorithms | The expectation-maximization (EM) algorithm is a well-known iterative method
for computing maximum likelihood estimates from incomplete data. Despite its
numerous advantages, a main drawback of the EM algorithm is its frequently
observed slow convergence which often hinders the application of EM algorithms
in high-dime... | 1803.06673v2 |
2018-03-21 | Connectivity-Preserving Coordination Control of Multi-Agent Systems with Time-Varying Delays | This paper presents a distributed position synchronization strategy that also
preserves the initial communication links for single-integrator multi-agent
systems with time-varying delays. The strategy employs a coordinating
proportional control derived from a specific type of potential energy,
augmented with damping in... | 1803.08152v1 |
2018-03-23 | A Novel Approach to Resonant Absorption of the Fast MHD Eigenmodes of a Coronal Arcade | The arched field lines forming coronal arcades are often observed to undulate
as magnetohydrodynamic (MHD) waves propagate both across and along the magnetic
field. These waves are most likely a combination of resonantly coupled fast
magnetoacoustic waves and Alfv\'en waves. The coupling results in resonant
absorption ... | 1803.08948v1 |
2018-03-25 | Parareal exponential $θ$-scheme for longtime simulation of stochastic Schrödinger equations with weak damping | A parareal algorithm based on an exponential $\theta$-scheme is proposed for
the stochastic Schr\"odinger equation with weak damping and additive noise. It
proceeds as a two-level temporal parallelizable integrator with the exponential
$\theta$-scheme as the propagator on the coarse grid. The proposed algorithm in
the ... | 1803.09188v1 |
2018-04-01 | Aggregated Momentum: Stability Through Passive Damping | Momentum is a simple and widely used trick which allows gradient-based
optimizers to pick up speed along low curvature directions. Its performance
depends crucially on a damping coefficient $\beta$. Large $\beta$ values can
potentially deliver much larger speedups, but are prone to oscillations and
instability; hence o... | 1804.00325v3 |
2018-04-03 | Damped perturbations in the no-boundary state | We evaluate the no-boundary path integral exactly in a Bianchi IX
minisuperspace with two scale factors. In this model the no-boundary proposal
can be implemented by requiring one scale factor to be zero initially together
with a judiciously chosen regularity condition on the momentum conjugate to the
second scale fact... | 1804.01102v2 |
2018-09-14 | Nonequilibrium polariton dynamics in a Bose-Einstein condensate coupled to an optical cavity | We study quasiparticle scattering effects on the dynamics of a homogeneous
Bose-Einstein condensate of ultracold atoms coupled to a single mode of an
optical cavity. The relevant excitations, which are polariton-like mixed
excitations of photonic and atomic density-wave modes, are identified. All the
first-order correl... | 1809.05427v2 |
2018-09-26 | The influence of oscillations on energy estimates for damped wave models with time-dependent propagation speed and dissipation | The aim of this paper is to derive higher order energy estimates for
solutions to the Cauchy problem for damped wave models with time-dependent
propagation speed and dissipation. The model of interest is \begin{equation*}
u_{tt}-\lambda^2(t)\omega^2(t)\Delta u +\rho(t)\omega(t)u_t=0, \quad
u(0,x)=u_0(x), \,\, u_t(0,x)=... | 1809.10179v2 |
2018-09-27 | Non-equilibrium Quantum Langevin dynamics of orbital diamagnetic moment | We investigate the time dependent orbital diamagnetic moment of a charged
particle in a magnetic field in a viscous medium via the Quantum Langevin
Equation. We study how the interplay between the cyclotron frequency and the
viscous damping rate governs the dynamics of the orbital magnetic moment in the
high temperatur... | 1809.10370v1 |
2018-10-31 | AGN Variability Analysis Handbook | This work develops application techniques for stochastic modelling of Active
Galactic Nuclei (AGN) variability as a probe of accretion disk physics.
Stochastic models, specifically Continuous Auto-Regressive Moving Average
(CARMA) models, characterize lightcurves by estimating delay timescales that
describe movements a... | 1811.00154v1 |
2018-11-15 | Unique ergodicity for a class of stochastic hyperbolic equations with additive space-time white noise | In this paper, we consider a certain class of second order nonlinear PDEs
with damping and space-time white noise forcing, posed on the $d$-dimensional
torus. This class includes the wave equation for $d=1$ and the beam equation
for $d\le 3$. We show that the Gibbs measure of the equation without forcing
and damping is... | 1811.06294v4 |
2018-12-04 | Optical excitation of single- and multi-mode magnetization precession in Galfenol nanolayers | We demonstrate a variety of precessional responses of the magnetization to
ultrafast optical excitation in nanolayers of Galfenol (Fe,Ga), which is a
ferromagnetic material with large saturation magnetization and enhanced
magnetostriction. The particular properties of Galfenol, including cubic
magnetic anisotropy and w... | 1812.01237v1 |
2018-12-10 | Assessment of skin-friction-reduction techniques on a turbulent wing section | The scope of the present project is to quantify the effects of uniform
blowing and body-force damping on turbulent boundary layers subjected to a
non-uniform adverse-pressure-gradient distribution. To this end, well-resolved
large-eddy simulations are employed to describe the flow around the NACA4412
airfoil at moderat... | 1812.03762v1 |
2018-12-18 | Gravitational quasinormal modes of black holes in Einstein-aether theory | The local Lorentz violation (LV) in gravity sector should show itself in
derivation of the characteristic quasinormal modes (QNMs) of black hole mergers
from their general relativity case. In this paper, I study QNMs of the
gravitational field perturbations to Einstein-aether black holes and, at first
compare them to t... | 1812.07994v1 |
2018-12-19 | Rain Calms the Sea - The Impact of Entrained Air | We propose a mechanism for the damping of short ocean gravity waves during
rainstorms associated with the injection of air bubbles by rain drops. The
mechanism is proposed as one of the possible explanations that ascribe to rain
a calming effect on ocean surface waves. A model is developed that shows how
wave attenuati... | 1812.08200v2 |
2018-12-25 | Blow-up for a weakly coupled system of semilinear damped wave equations in the scattering case with power nonlinearities | In this work we study the blow-up of solutions of a weakly coupled system of
damped semilinear wave equations in the scattering case with power
nonlinearities. We apply an iteration method to study both the subcritical case
and the critical case. In the subcritical case our approach is based on lower
bounds for the spa... | 1812.10086v1 |
2018-12-27 | Global existence of solutions to semilinear damped wave equation with slowly decaying inital data in exterior domain | In this paper, we discuss the global existence of weak solutions to the
semilinear damped wave equation \begin{equation*} \begin{cases}
\partial_t^2u-\Delta u + \partial_tu = f(u) & \text{in}\ \Omega\times (0,T), \\
u=0 & \text{on}\ \partial\Omega\times (0,T), \\ u(0)=u_0, \partial_tu(0)=u_1 &
\text{in}\ \Omega, \end{c... | 1812.10664v1 |
2019-02-08 | Milky Way Halo Vibrations and Incommensurate Stream Velocities | Collisionless dark matter galactic halos are expected to exhibit damped
oscillations as a result of ongoing late time accretion. An n-body model of the
cosmological assembly of a Milky Way-like halo is used to quantify the time
dependence of its gravitational field. The simulation contains stellar streams
whose incomme... | 1902.03275v2 |
2019-02-20 | Dark matter gets DAMPE at high energies | The DArk Matter Particle Explorer (DAMPE) mission revealed a break in the
spectrum of cosmic-ray electons and positrons. This is associated with an
excess above the expected backgrounds at energies around 1 TeV. Several authors
have argued that such an excess can be explained in terms of dark matter models
that feature... | 1902.07468v1 |
2019-02-23 | General symmetry in the reduced dynamics of two-level system | We study general transformation on the density matrix of two-level system
that keeps the expectation value of observable invariant. We introduce a set of
generators that yields hermiticity and trace preserving general transformation
which casts the transformation into simple form. The general transformation is
in gener... | 1902.08714v2 |
2019-02-25 | Interpretation of the cosmic ray positron and electron excesses with an annihilating-decaying dark matter scenario | The precise measurements of energy spectra of cosmic ray positrons and/or
electrons by recent experiments show clear excesses above 10 GeV. Moreover, a
potential sharp spectral feature was suggested by the Dark Matter Particle
Explorer (DAMPE) data. These results inspire quite a number of discussions on
the connection ... | 1902.09235v2 |
2019-02-27 | Necessary and Sufficient Conditions for Passivity of Velocity-Sourced Impedance Control of Series Elastic Actuators | Series Elastic Actuation (SEA) has become prevalent in applications involving
physical human-robot interaction as it provides considerable advantages over
traditional stiff actuators in terms of stability robustness and fidelity of
force control. Several impedance control architectures have been proposed for
SEA. Among... | 1902.10607v2 |
2019-03-01 | Response to: [Comment on Quantization of the damped harmonic oscillator [Serhan et al, J. Math. Phys. 59, 082105 (2018)]] | This is a response to a recently reported comment [1] on paper [J. Math.
Phys.59, 082105 (2018)] regarding the quantization of damped harmonic
oscillator using a non-Hermitian Hamiltonian with real energy eigenvalues. We
assert here that the calculation of Eq. (29) of [2] is incorrect, and thus the
subsequent steps via... | 1903.00352v2 |
2019-03-07 | Current-induced motion of twisted skyrmions | Twisted skyrmions, whose helicity angles are different from that of Bloch
skyrmions and N\'eel skyrmions, have already been demonstrated in experiments
recently. In this work, we first contrast the magnetic structure and origin of
the twisted skyrmion with other three types of skyrmion including Bloch
skyrmion, N\'eel ... | 1903.02812v1 |
2019-03-08 | Protecting quantum correlations in presence of generalised amplitude damping channel: the two-qubit case | Any kind of quantum resource useful in different information processing tasks
is vulnerable to several types of environmental noise. Here we study the
behaviour of quantum correlations such as entanglement and steering in
two-qubit systems under the application of the generalised amplitude damping
channel and propose s... | 1903.03550v2 |
2019-03-17 | Generalized Euler, Smoluchowski and Schrödinger equations admitting self-similar solutions with a Tsallis invariant profile | The damped isothermal Euler equations, the Smoluchowski equation and the
damped logarithmic Schr\"odinger equation with a harmonic potential admit
stationary and self-similar solutions with a Gaussian profile. They satisfy an
$H$-theorem for a free energy functional involving the von Weizs\"acker
functional and the Bol... | 1903.07111v1 |
2019-03-21 | Creating localized plasma wave by ionization of doped semiconductors | Localized plasma waves can be generated by suddenly ionizing extrinsic
semiconductors with spatially periodic dopant densities. The built-in
electrostatic potentials at the metallurgical junctions, combined with electron
density ripples, offer the exact initial condition for exciting long-lasting
plasma waves upon ioni... | 1903.09013v2 |
2019-03-22 | Noncommutative approach to diagnose degenerate Higgs bosons at 125 GeV | We propose a noncommutative (NC) version for a global O(2) scalar field
theory, whose damping feature is introduced into the scalar field theory
through the NC parameter. In this context, we investigate how noncommutative
drives spontaneous symmetry breaking (SSB) and Higgs-Kibble mechanisms and how
the damping feature... | 1903.09727v2 |
2019-05-02 | The floatability of aerosols and waves damping on Titan's seas | Titan, Saturn's largest moon, has a dense atmosphere, together with lakes and
seas of liquid hydrocarbons. These liquid bodies, which are in polar regions
and up to several hundred kilometres in diameter, generally have smooth
surfaces despite evidence of near-surface winds. Photochemically generated
organic aerosols f... | 1905.00760v1 |
2019-05-02 | Holographic Plasmon Relaxation with and without Broken Translations | We study the dynamics and the relaxation of bulk plasmons in strongly coupled
and quantum critical systems using the holographic framework. We analyze the
dispersion relation of the plasmonic modes in detail for an illustrative class
of holographic bottom-up models. Comparing to a simple hydrodynamic formula, we
entang... | 1905.00804v2 |
2019-05-05 | Effective spin-mixing conductance of heavy-metal-ferromagnet interfaces | The effective spin-mixing conductance (G_eff) of a heavy metal/ferromagnet
(HM/FM) interface characterizes the efficiency of the interfacial spin
transport.Accurately determining G_eff is critical to the quantitative
understanding of measurements of direct and inverse spin Hall effects. G_eff is
typically ascertained f... | 1905.01577v2 |
2019-05-07 | Integral representation formulae for the solution of a wave equation with time-dependent damping and mass in the scale-invariant case | This paper is devoted to derive integral representation formulae for the
solution of an inhomogeneous linear wave equation with time-dependent damping
and mass terms, that are scale-invariant with respect to the so-called
hyperbolic scaling. Yagdjian's integral transform approach is employed for this
purpose. The main ... | 1905.02408v1 |
2019-05-07 | Optimal decay for the $n$-dimensional incompressible Oldroyd-B model without damping mechanism | By a new energy approach involved in the high frequencies and low frequencies
decomposition in the Besov spaces, we obtain the optimal decay for the
incompressible Oldroyd-B model without damping mechanism in $\mathbb{R}^n$
($n\ge 2$). More precisely, let $(u,\tau)$ be the global small solutions
constructed in [18],
... | 1905.02604v1 |
2019-05-12 | Transport and Phonon Damping in $^{\bf 4}$He | The dynamic structure function $S(k,\omega)$ informs about the dispersion and
damping of excitations. We have recently (Phys. Rev. B {\bf 97}, 184520 (2018))
compared experimental results for $S(k,\omega)$ from high-precision neutron
scattering experiment and theoretical results using the ``dynamic many-body
theory'' (... | 1905.04759v1 |
2019-05-15 | Nearly Markovian maps and entanglement-based bound on corresponding non-Markovianity | We identify a set of dynamical maps of open quantum system, and refer to them
as "$ \epsilon $-Markovian" maps. It is constituted of maps which, in a higher
dimensional system-environment Hilbert space, possibly violate Born
approximation but only a "little". We characterize the
"$\epsilon$-nonmarkovianity" of a genera... | 1905.06198v3 |
2019-05-15 | A remark on triviality for the two-dimensional stochastic nonlinear wave equation | We consider the two-dimensional stochastic damped nonlinear wave equation
(SdNLW) with the cubic nonlinearity, forced by a space-time white noise. In
particular, we investigate the limiting behavior of solutions to SdNLW with
regularized noises and establish triviality results in the spirit of the work
by Hairer, Ryser... | 1905.06278v3 |
2019-05-17 | Chiral p-wave superconductors have complex coherence and magnetic field penetration lengths | We show that in superconductors that break time reversal symmetry and have
anisotropy, such as p+ip materials, all order parameters and magnetic modes are
mixed. Excitation of the gap fields produces an excitation of the magnetic
field and vice versa. Correspondingly the long-range decay of the magnetic
field and order... | 1905.07296v2 |
2019-05-20 | Short time blow-up by negative mass term for semilinear wave equations with small data and scattering damping | In this paper we study blow-up and lifespan estimate for solutions to the
Cauchy problem with small data for semilinear wave equations with scattering
damping and negative mass term. We show that the negative mass term will play a
dominant role when the decay of its coefficients is not so fast, thus the
solutions will ... | 1905.08100v1 |
2019-05-21 | Low-pass-filter-based shock response spectrum and the evaluation method of transmissibility between equipment and sensitive components interfaces | According to the features of the sources of pyroshock and ballistic shock,
this study considers the pyroshock and ballistic shock generated by their
respective impulsive sources as damped harmonic waves with different
frequencies. According to the linear superposition assumption of damped
harmonic waves in a linear ela... | 1905.10190v1 |
2019-05-24 | Sound damping in glasses: interplay between anharmonicities and elastic heterogeneities | Some facets of the way sound waves travel through glasses are still unclear.
Recent works have shown that in the low-temperature harmonic limit a crucial
role in controlling sound damping is played by local elastic heterogeneity.
Sound waves propagation has been demonstrated to be strongly affected by
inhomogeneous mec... | 1905.10235v2 |
2019-05-27 | A blow-up result for a semilinear wave equation with scale-invariant damping and mass and nonlinearity of derivative type | In this note, we prove blow-up results for semilinear wave models with
damping and mass in the scale-invariant case and with nonlinear terms of
derivative type. We consider the single equation and the weakly coupled system.
In the first case we get a blow-up result for exponents below a certain shift
of the Glassey exp... | 1905.11025v2 |
2019-05-28 | Stationary states for underdamped anharmonic oscillators driven by Cauchy noise | Using methods of stochastic dynamics, we have studied stationary states in
the underdamped anharmonic stochastic oscillators driven by Cauchy noise. Shape
of stationary states depend both on the potential type and the damping. If the
damping is strong enough, for potential wells which in the overdamped regime
produce m... | 1905.12078v2 |
2019-08-01 | The $J$-method for the Gross-Pitaevskii eigenvalue problem | This paper studies the $J$-method of [E. Jarlebring, S. Kvaal, W. Michiels.
SIAM J. Sci. Comput. 36-4:A1978-A2001, 2014] for nonlinear eigenvector problems
in a general Hilbert space framework. This is the basis for variational
discretization techniques and a mesh-independent numerical analysis. A simple
modification o... | 1908.00333v2 |
2019-08-02 | How do Conservative Backbone Curves Perturb into Forced Responses? A Melnikov Function Analysis | Weakly damped mechanical systems under small periodic forcing tend to exhibit
periodic response in a close vicinity of certain periodic orbits of their
conservative limit. Specifically, amplitude frequency plots for the
conservative limit have often been noted, both numerically and experimentally,
to serve as backbone ... | 1908.00721v3 |
2019-08-05 | Tunable strong coupling of two adjacent optical λ/2 Fabry-Pérot microresonators | Optical half-wave microresonators enable to control the optical mode density
around a quantum system and thus to modify the temporal emission properties. If
the coupling rate exceeds the damping rate, strong coupling between a
microresonator and a quantum system can be achieved, leading to a coherent
energy exchange an... | 1908.01566v1 |
2019-07-27 | An extension of the second order dynamical system that models Nesterov's convex gradient method | In this paper we deal with a general second order continuous dynamical system
associated to a convex minimization problem with a Fr\`echet differentiable
objective function. We show that inertial algorithms, such as Nesterov's
algorithm, can be obtained via the natural explicit discretization from our
dynamical system.... | 1908.02574v1 |
2019-08-07 | Interfacial contributions to spin-orbit torque and magnetoresistance in ferromagnet/heavy-metal bilayers | The thickness dependence of spin-orbit torque and magnetoresistance in
ferromagnet/heavy-metal bilayers is studied using the first-principles
non-equilibrium Green's function formalism combined with the Anderson disorder
model. A systematic expansion in orthogonal vector spherical harmonics is used
for the angular depe... | 1908.02680v2 |
2019-08-16 | Dynamics of Hot Bose-Einstein Condensates: stochastic Ehrenfest relations for number and energy damping | Describing partially-condensed Bose gases poses a long-standing theoretical
challenge. We present exact stochastic Ehrenfest relations for the stochastic
projected Gross-Pitaevskii equation, including both number and energy damping
mechanisms, and all projector terms that arise from the energy cutoff
separating system ... | 1908.05809v3 |
2019-08-12 | On a simple derivation of the very low damping escape rate for classical spins by modifying the method of Kramers | The original perturbative Kramers' method (starting from the phase space
coordinates) (Kramers, 1940) of determining the energy-controlled-diffusion
equation for Newtonian particles with separable and additive Hamiltonians is
generalized to yield the energy-controlled diffusion equation and thus the very
low damping (V... | 1908.06747v1 |
2019-08-22 | Improving the dynamics of quantum sensors with reinforcement learning | Recently proposed quantum-chaotic sensors achieve quantum enhancements in
measurement precision by applying nonlinear control pulses to the dynamics of
the quantum sensor while using classical initial states that are easy to
prepare. Here, we use the cross-entropy method of reinforcement learning to
optimize the streng... | 1908.08416v2 |
2019-08-28 | Spin functional renormalization group for quantum Heisenberg ferromagnets: Magnetization and magnon damping in two dimensions | We use the spin functional renormalization group recently developed by two of
us [J. Krieg and P. Kopietz, Phys. Rev. B $\bf{99}$, 060403(R) (2019)] to
calculate the magnetization $M ( H , T )$ and the damping of magnons due to
classical longitudinal fluctuations of quantum Heisenberg ferromagnets. In
order to guarante... | 1908.10753v2 |
2019-09-03 | Learning Elastic Constitutive Material and Damping Models | Commonly used linear and nonlinear constitutive material models in
deformation simulation contain many simplifications and only cover a tiny part
of possible material behavior. In this work we propose a framework for learning
customized models of deformable materials from example surface trajectories.
The key idea is t... | 1909.01875v2 |
2019-09-06 | Effect of Tantalum spacer thickness and deposition conditions on the properties of MgO/CoFeB/Ta/CoFeB/MgO free layers | To get stable perpendicularly magnetized tunnel junctions at small device
dimensions, composite free layers that comprise two MgO/FeCoB interfaces as
sources of interface anisotropy are generally used. Proper cristallisation and
annealing robustness is typically ensured by the insertion of a spacer layer of
the early t... | 1909.02741v1 |
2019-09-10 | Spin Pumping from Permalloy into Uncompensated Antiferromagnetic Co doped Zinc Oxide | Heterostructures of Co-doped ZnO and Permalloy were investigated for their
static and dynamic magnetic interaction. The highly Co-doped ZnO is
paramagentic at room temperature and becomes an uncompensated antiferromagnet
at low temperatures, showing a narrowly opened hysteresis and a vertical
exchange bias shift even i... | 1909.04362v3 |
2019-09-19 | Blow-up for Strauss type wave equation with damping and potential | We study a kind of nonlinear wave equations with damping and potential, whose
coefficients are both critical in the sense of the scaling and depend only on
the spatial variables. Based on the earlier works, one may think there are two
kinds of blow-up phenomenons when the exponent of the nonlinear term is small.
It als... | 1909.08885v3 |
2019-09-23 | Inference of modes for linear stochastic processes | For dynamical systems that can be modelled as asymptotically stable linear
systems forced by Gaussian noise, this paper develops methods to infer or
estimate their modes from observations in real time. The modes can be real or
complex. For a real mode, we wish to infer its damping rate and mode shape. For
a complex mod... | 1909.10247v2 |
2019-11-06 | High spin mixing conductance and spin interface transparency at $Co_2Fe_{0.4}Mn_{0.6}Si$ Heusler alloy and Pt interface | Ferromagnetic materials exhibiting low magnetic damping ($\alpha$) and
moderately high saturation magnetization are required from the viewpoints of
generation, transmission and detection of spin wave. Since spin-to-charge
conversion efficiency is another important parameter, high spin mixing
conductance ($g_{r}^{\uparr... | 1911.02230v1 |
2019-11-10 | Influence of resonances on the noise performance of SQUID susceptometers | Scanning Superconducting Quantum Interference Device (SQUID) Susceptometry
simultaneously images the local magnetic fields and susceptibilities above a
sample with sub-micron spatial resolution. Further development of this
technique requires a thorough understanding of the current, voltage, and flux
characteristics of ... | 1911.03836v2 |
2019-11-13 | Impact of the crystal orientation on spin-orbit torques in Fe/Pd bilayers | Spin-orbit torques in ferromagnetic (FM)/non-magnetic (NM) heterostructures
offer more energy-efficient means to realize spin-logic devices; however, their
strengths are determined by the heterostructure interface. This work examines
crystal orientation impact on the spin-orbit torque efficiency in different
Fe/Pd bila... | 1911.05487v1 |
2020-01-04 | Finite Difference/Galerkin Finite Element Simulation of the Semi-Linear Wave Equation with Scale-Invariant Damping and Mass and Power Non-Linearity | This study is concern with the numerical solution of the initial boundary
value problem (IBVP) for the semilinear scale-invariant wave equation with
damping and mass and power non-linearity. Numerical results of the
aforementioned IBVP is obtained by using standart Galerkin finite element
method (GFEM) for the spatial ... | 2001.01075v2 |
2020-01-05 | Quantifying quantum non-Markovianity based on quantum coherence via skew information | Based on the nonincreasing property of quantum coherence via skew information
under incoherent completely positive and trace-preserving maps, we propose a
non-Markovianity measure for open quantum processes. As applications, by
applying the proposed measure to some typical noisy channels, we find that it
is equivalent ... | 2001.01261v1 |
2020-01-07 | von Neumann entropy and the entropy production of a damped harmonic oscillator | In this paper we analyze the entropy and entropy production of a non-isolated
quantum system described within the quantum Brownian motion framework. This is
a very general and paradigmatic framework for describing non-isolated quantum
systems and can be used in any kind of coupling regime. We start by considering
the a... | 2001.02261v1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.