publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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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 |
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 |
2018-07-02 | Global Existence of Solutions to the Compressible Euler Equations with Time-dependent Damping and Logarithmic State Equation | In mathematical physics, the pressure function is determined by the equation
of state. There are two existing barotropic state equations: the state equation
for polytropic gas with adiabatic index greater than or equal to 1 and the
state equation for generalized Chaplygin gas in cosmology. In this paper, a
logarithmic ... | 1807.00550v2 |
2018-07-02 | On wave equations of the $p$-Laplacian type with supercritical nonlinearities | This article focuses on a quasilinear wave equation of $p$-Laplacian type: \[
u_{tt} - \Delta_p u -\Delta u_t = f(u) \] 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 nonlin... | 1807.00650v1 |
2018-06-30 | Efficient $p$-multigrid method based on an exponential time discretization for compressible steady flows | An efficient multigrid framework is developed for the time marching of
steady-state compressible flows with a spatially high-order ($p$-order
polynomial) modal discontinuous Galerkin method. The core algorithm that based
on a global coupling, exponential time integration scheme provides strong
damping effects to accele... | 1807.01151v1 |
2018-07-04 | Structural crossover in a model fluid exhibiting two length scales: repercussions for quasicrystal formation | We investigate the liquid state structure of the two-dimensional (2D) model
introduced by Barkan et al. [Phys. Rev. Lett. 113, 098304 (2014)], which
exhibits quasicrystalline and other unusual solid phases, focussing on the
radial distribution function $g(r)$ and its asymptotic decay $r\to\infty$. For
this particular m... | 1807.01467v1 |
2018-07-04 | Dirac's Method for the Two-Dimensional Damped Harmonic Oscillator in the Extended Phase Space | The system of two-dimensional damped harmonic oscillator is revisited in the
extended phase space. It is an old problem already addressed by many authors
that we present here in some fresh points of view and carry on smoothly a whole
discussion. We show that the system is singular. The classical Hamiltonian is
proporti... | 1807.01539v2 |
2018-07-05 | Decay of approximate solutions for the damped semilinear wave equation on a bounded 1d domain | In this paper we study the long time behavior for a semilinear wave equation
with space-dependent and nonlinear damping term. After rewriting the equation
as a first order system, we define a class of approximate solutions that employ
tipical tools of hyperbolic systems of conservation laws, such as the Riemann
problem... | 1807.01968v3 |
2018-07-07 | Axial Quasi-Normal Modes of Scalarized Neutron Stars with Realistic Equations of State | We compute the axial quasi-normal modes of static neutron stars in scalar
tensor theory. In particular, we employ various realistic equations of state
including nuclear, hyperonic and hybrid matter. We investigate the fundamental
curvature mode and compare the results with those of General Relativity. We
find that the ... | 1807.02598v1 |
2018-07-09 | DLA and sub-DLA metallicity evolution: A case study of absorbers towards Q0338-0005 | The damped and sub-damped Lyman alpha systems (DLAs and sub-DLAs) traced in
absorption against bright background quasars represent the main reserve of
neutral hydrogen at high redshifts. We used the archival Very Large Telescope
(VLT) instrument Ultraviolet and Visual Echelle Spectrograph (UVES)
high-resolution data of... | 1807.04189v1 |
2018-07-19 | Vibrational damping effects on electronic energy relaxation in molecular aggregates | Representation of molecular vibrational degrees of freedom by independent
harmonic oscillators, when describing electronic spectra or electronic
excitation energy transport, raises unfavourable effects as vibrational energy
relaxation becomes inaccessible. A standard theoretical description is extended
in this paper by... | 1807.07314v1 |
2018-07-24 | Role of stable modes in driven shear-flow turbulence | A linearly unstable, sinusoidal $E \times B$ shear flow is examined in the
gyrokinetic framework in both the linear and nonlinear regimes. In the linear
regime, it is shown that the eigenmode spectrum is nearly identical to
hydrodynamic shear flows, with a conjugate stable mode found at every unstable
wavenumber. In th... | 1807.09280v1 |
2018-08-08 | An application of $L^1$ estimates for oscillating integrals to parabolic like semi-linear structurally damped $σ$-evolution models | We study the following Cauchy problems for semi-linear structurally damped
$\sigma$-evolution models: \begin{equation*} u_{tt}+ (-\Delta)^\sigma u+ \mu
(-\Delta)^\delta u_t = f(u,u_t),\, u(0,x)= u_0(x),\, u_t(0,x)=u_1(x)
\end{equation*} with $\sigma \ge 1$, $\mu>0$ and $\delta \in
(0,\frac{\sigma}{2})$. Here the functi... | 1808.02706v2 |
2018-08-09 | Two-qubit state recovery from amplitude damping based on weak measurement | In the quantum control process, arbitrary pure or mixed initial states need
to be protected from amplitude damping through the noise channel using
measurements and quantum control. However, how to achieve it on a two-qubit
quantum system remains a challenge. In this paper, we propose a feed-forward
control approach to ... | 1808.03094v1 |
2018-08-10 | Dynamical polarization and the optical response of silicene and related materials | We discuss the dynamical polarization, optical response in low-frequency
regime under in-plane polarized driving field of the silicene. The dynamical
polarization, dielectric function, and absorption of radiation in infrared
region are obtained and shown in the ${\bf q}\sim\omega$ space, and they are
distinguishing for... | 1808.03442v1 |
2018-08-19 | Reconstruction algorithms for photoacoustic tomography in heterogenous damping media | In this article, we study several reconstruction methods for the inverse
source problem of photoacoustic tomography (PAT) with spatially variable sound
speed and damping. The backbone of these methods is the adjoint operators,
which we thoroughly analyze in both the $L^2$- and $H^1$-settings. They are
casted in the for... | 1808.06176v1 |
2018-08-27 | Landau damping of Alfvénic modes in stellarators | It is found that the presence of the so-called non-axisymmetric resonances of
wave-particle interaction in stellarators [which are associated with the lack
of axial symmetry of the magnetic configuration, Kolesnichenko et al., Phys.
Plasmas 9 (2002) 517] may have a strong stabilizing influence through Landau
mechanism ... | 1808.08862v1 |
2018-09-29 | Uniform stabilization for the Klein-Gordon system in a inhomogeneous medium with locally distributed damping | We consider the Klein-Gordon system posed in an inhomogeneous medium with
smooth boundary subject to a local viscoelastic damping distributed around a
neighborhoodof the boundary according to the Geometric Control Condition. We
show that the energy of the system goes uniformly and exponentially to zero for
all initial ... | 1810.00247v1 |
2018-10-09 | Lévy-walk-like Langevin dynamics | Continuous time random walks and Langevin equations are two classes of
stochastic models for describing the dynamics of particles in the natural
world. While some of the processes can be conveniently characterized by both of
them, more often one model has significant advantages (or has to be used)
compared with the oth... | 1810.04332v1 |
2018-10-18 | Analysis of the controllability from the exterior of strong damping nonlocal wave equations | We make a complete analysis of the controllability properties from the
exterior of the (possible) strong damping wave equation with the fractional
Laplace operator subject to the nonhomogeneous Dirichlet type exterior
condition. In the first part, we show that if $0<s<1$, $\Omega\subset\RR^N$
($N\ge 1$) is a bounded Li... | 1810.08060v1 |
2018-10-20 | Memory-based mediated interactions between rigid particulate inclusions in viscoelastic environments | Many practically relevant materials combine properties of viscous fluids and
elastic solids to viscoelastic behavior. Our focus is on the induced dynamic
behavior of damped finite-sized particulate inclusions in such substances. We
explicitly describe history-dependent interactions that emerge between the
embedded part... | 1810.08832v1 |
2018-10-22 | Dynamical instability towards finite-momentum pairing in quenched BCS superconducting phases | In this work we numerically investigate the fate of the
Bardeen-Cooper-Schrieffer (BCS) pairing in the presence of quenched phase under
Peierls substitution using time-dependent real space and momentum space
Bogoliubov-de Gennes equation methods and Anderson pseudospin representation
method. This kind of phase imprint ... | 1810.09125v1 |
2018-10-21 | A note on a weakly coupled system of semi-linear visco-elastic damped $σ$-evolution models with different power nonlinearities and different $σ$ values | In this article, we prove the global (in time) existence of small data
solutions from energy spaces basing on $L^q$ spaces, with $q \in (1,\infty)$,
to the Cauchy problems for a weakly coupled system of semi-linear visco-elastic
damped $\sigma$-evolution models. Here we consider different power
nonlinearities and diffe... | 1810.09664v1 |
2018-10-25 | First-principles calculation of spin-orbit torque in a Co/Pt bilayer | The angular dependence of spin-orbit torque in a disordered Co/Pt bilayer is
calculated using a first-principles non-equilibrium Green's function formalism
with an explicit supercell averaging over Anderson disorder. In addition to the
usual dampinglike and fieldlike terms, the odd torque contains a sizeable
planar Hal... | 1810.11003v2 |
2018-10-29 | Optimal identification of non-Markovian environments for spin chains | Correlations of an environment are crucial for the dynamics of non-Markovian
quantum systems, which may not be known in advance. In this paper, we propose a
gradient algorithm for identifying the correlations in terms of time-varying
damping rate functions in a time-convolution-less master equation for spin
chains. By ... | 1810.11923v1 |
2018-10-29 | Existence and uniqueness of dynamic evolutions for a one-dimensional debonding model with damping | In this paper we analyse a one-dimensional debonding model for a thin film
peeled from a substrate when viscosity is taken into account. It is described
by the weakly damped wave equation whose domain, the debonded region, grows
according to a Griffith's criterion. Firstly we prove that the equation admits
a unique sol... | 1810.12006v3 |
2019-01-03 | Calibration and Status of the 3D Imaging Calorimeter of DAMPE for Cosmic Ray Physics on Orbit | The DArk Matter Particle Explorer (DAMPE) developed in China was designed to
search for evidence of dark matter particles by observing primary cosmic rays
and gamma rays in the energy range from 5 GeV to 10 TeV. Since its launch in
December 2015, a large quantity of data has been recorded. With the data set
acquired du... | 1901.00734v1 |
2019-01-08 | Atom-only descriptions of the driven-dissipative Dicke model | We investigate how to describe the dissipative spin dynamics of the
driven-dissipative Dicke model, describing $N$ two-level atoms coupled to a
cavity mode, after adiabatic elimination of the cavity mode. To this end, we
derive a Redfield master equation which goes beyond the standard secular
approximation and large de... | 1901.02473v2 |
2019-01-10 | Stability and Controllability results for a Timoshenko system | In this paper, we study the indirect boundary stability and exact
controllability of a one-dimensional Timoshenko system. In the first part of
the paper, we consider the Timoshenko system with only one boundary fractional
damping. We first show that the system is strongly stable but not uniformly
stable. Hence, we look... | 1901.03303v2 |
2019-01-13 | Dueling Dynamical Backaction in a Cryogenic Optomechanical Cavity | Dynamical backaction has proven to be a versatile tool in cavity
optomechanics, allowing for precise manipulation of a mechanical resonator's
motion using confined optical photons. In this work, we present measurements of
a silicon whispering-gallery-mode optomechanical cavity where backaction
originates from opposing ... | 1901.03950v1 |
2019-01-22 | Coupling between superfluid neutrons and superfluid protons in the elementary excitations of neutron star matter | Several phenomena occurring in neutron stars are affected by the elementary
excitations that characterize the stellar matter. In particular, low-energy
excitations can play a major role in the emission and propagation of neutrinos,
neutron star cooling and transport processes. In this paper, we consider the
elementary ... | 1901.07550v1 |
2019-03-30 | Uncertainty damping in kinetic traffic models by driver-assist controls | In this paper, we propose a kinetic model of traffic flow with uncertain
binary interactions, which explains the scattering of the fundamental diagram
in terms of the macroscopic variability of aggregate quantities, such as the
mean speed and the flux of the vehicles, produced by the microscopic
uncertainty. Moreover, ... | 1904.00257v2 |
2019-04-01 | Reduction of Kinetic Equations to Liénard-Levinson-Smith Form: Counting Limit Cycles | We have presented an unified scheme to express a class of system of equations
in two variables into a Li\'enard-Levinson-Smith (LLS) oscillator form. We have
derived the condition for limit cycle with special reference to Rayleigh and
Li\'enard systems for arbitrary polynomial functions of damping and restoring
force. ... | 1904.00604v2 |
2019-04-02 | Stability of the interface of an isotropic active fluid | We study the linear stability of an isotropic active fluid in three different
geometries: a film of active fluid on a rigid substrate, a cylindrical thread
of fluid, and a spherical fluid droplet. The active fluid is modeled by the
hydrodynamic theory of an active nematic liquid crystal in the isotropic phase.
In each ... | 1904.01558v1 |
2019-04-04 | Shear viscosity of classical fields in scalar theory | We investigate the shear viscosity of massless classical scalar fields in the
$\phi^4$ theory on a lattice by using the Green-Kubo formula. Based on the
scaling property of the classical field, the shear viscosity is represented
using a scaling function. Equilibrium expectation value of the time-correlation
function of... | 1904.02419v3 |
2019-04-08 | Study of Decoherence in Quantum Computers: A Circuit-Design Perspective | Decoherence of quantum states is a major hurdle towards scalable and reliable
quantum computing. Lower decoherence (i.e., higher fidelity) can alleviate the
error correction overhead and obviate the need for energy-intensive noise
reduction techniques e.g., cryogenic cooling. In this paper, we performed a
noise-induced... | 1904.04323v1 |
2019-04-23 | A novel undamped gapless plasmon mode in tilted type-II Dirac semimetal | We predict the existence of a novel long-lived gapless plasmon mode in a
type-II Dirac semimetal (DSM). This gapless mode arises from the out-of-phase
oscillations of the density fluctuations in the electron and the hole pockets
of a type-II DSM. It originates beyond a critical wave-vector along the
direction of the ti... | 1904.10137v1 |
2019-04-25 | Interplay between nonclassicality and $\mathcal{PT}$ symmetry in an effective two level system with open system effects | A three level atom in $\Lambda$ configuration is reduced to an effective two
level system, under appropriate conditions, and its $\mathcal{PT}$ symmetric
properties are investigated. This effective qubit system when subjected to a
beam-splitter type of interaction, it provides the scope of directly
(indirectly) probing... | 1904.11181v1 |
2019-04-30 | A Self-Adaptive Contractive Algorithm for Enhanced Dynamic Phasor Estimation | In this paper, a self-adaptive contractive (SAC) algorithm is proposed for
enhanced dynamic phasor estimation in the diverse operating conditions of
modern power systems. At a high-level, the method is composed of three stages:
parameter shifting, filtering and parameter unshifting. The goal of the first
stage is to tr... | 1904.13328v1 |
2019-06-04 | High frequency voltage-induced ferromagnetic resonance in magnetic tunnel junctions | Voltage-induced ferromagnetic resonance (V-FMR) in magnetic tunnel junctions
(MTJs) with a W buffer is investigated. Perpendicular magnetic anisotropy (PMA)
energy is controlled by both thickness of a CoFeB free layer deposited directly
on the W buffer and a post-annealing process at different temperatures. The PMA
ene... | 1906.01301v1 |
2019-06-04 | Late time approach to Hawking radiation: terms beyond leading order | Black hole evaporation is studied using wave packets for the modes. These
allow for approximate frequency and time resolution. The leading order late
time behavior gives the well known Hawking radiation that is independent of how
the black hole formed. The focus here is on the higher order terms and the rate
at which t... | 1906.01735v2 |
2019-06-20 | Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features | We extend the formalism of time-sliced perturbation theory (TSPT) for
cosmological large-scale structure to include non-Gaussian initial conditions.
We show that in such a case the TSPT interaction vertices acquire new
contributions whose time-dependence factorizes for the Einstein-de Sitter
cosmology. The new formulat... | 1906.08697v2 |
2019-06-21 | Exponential damping induced by random and realistic perturbations | Given a quantum many-body system and the expectation-value dynamics of some
operator, we study how this reference dynamics is altered due to a perturbation
of the system's Hamiltonian. Based on projection operator techniques, we unveil
that if the perturbation exhibits a random-matrix structure in the eigenbasis
of the... | 1906.09268v2 |
2019-06-27 | Fast control of dissipation in a superconducting resonator | We report on fast tunability of an electromagnetic environment coupled to a
superconducting coplanar waveguide resonator. Namely, we utilize a
recently-developed quantum-circuit refrigerator (QCR) to experimentally
demonstrate a dynamic tunability in the total damping rate of the resonator up
to almost two orders of ma... | 1906.11519v1 |
2019-06-28 | Ground-state cooling of an magnomechanical resonator induced by magnetic damping | Quantum manipulation of mechanical resonators has been widely applied in
fundamental physics and quantum information processing. Among them, cooling the
mechanical system to its quantum ground state is regarded as a key step. In
this work, we propose a scheme which one can realize ground-state cooling of
resonator in a... | 1906.12081v1 |
2019-06-30 | Non-linear spin torque, pumping and cooling in superconductor/ferromagnet systems | We study the effects of the coupling between magnetization dynamics and the
electronic degrees of freedom in a heterostructure of a metallic nanomagnet
with dynamic magnetization coupled with a superconductor containing a steady
spin-splitting field. We predict how this system exhibits a non-linear spin
torque, which c... | 1907.00424v2 |
2019-07-03 | Wave-ice interaction in the North-West Barents Sea | The results of field work on drift ice during wave propagation are analyzed
and presented. The field work was performed in the Barents Sea, and the main
focus of the paper is on wave processes in the MIZ. A model of wave damping in
broken ice is formulated and applied to interpret the field work results. It is
confirme... | 1907.02032v1 |
2019-07-03 | Anisotropy of spin-transfer torques and Gilbert damping induced by Rashba coupling | Spin-transfer torques (STT), Gilbert damping (GD), and effective spin
renormalization (ESR) are investigated microscopically in a 2D Rashba
ferromagnet with spin-independent Gaussian white-noise disorder. Rashba
spin-orbit coupling induced anisotropy of these phenomena is thoroughly
analysed. For the case of two partly... | 1907.02041v3 |
2019-07-05 | Nesterov's acceleration and Polyak's heavy ball method in continuous time: convergence rate analysis under geometric conditions and perturbations | In this article a family of second order ODEs associated to inertial gradient
descend is studied. These ODEs are widely used to build trajectories converging
to a minimizer $x^*$ of a function $F$, possibly convex. This family includes
the continuous version of the Nesterov inertial scheme and the continuous heavy
ball... | 1907.02710v1 |
2019-07-08 | Role of Toll-Like Receptors in the interplay between pathogen and damage associated molecular patterns | Various theoretical studies have been carried out to infer relevant
protein-protein interactions among pathogens and their hosts. Such studies are
generally based on preferential attachment of bacteria / virus to their human
receptor homologs. We have analyzed 17 pathogenic species mainly belonging to
bacterial and vir... | 1907.03512v1 |
2019-07-15 | Alternating Direction Method of Multipliers (ADMMs) Based Distributed Approach For Wide-Area Control | In this paper, an alternating direction method of multipliers based novel
distributed wide-area control architecture is proposed for damping the
interarea oscillations. In this approach, first, an interconnected power system
is divided into areas based on coherency grouping. Second, local processors are
assigned on eac... | 1907.06340v1 |
2019-07-16 | Coherency and Online Signal Selection Based Wide Area Control of Wind Integrated Power Grid | This paper introduces a novel method of designing wide area control (WAC)
based on a discrete linear quadratic regulator and Kalman filtering based
state-estimation that can be applied for real-time damping of interarea
oscillations of wind integrated power grid. The main advantages of the proposed
method are that the ... | 1907.06846v1 |
2019-07-20 | Magnon Bose-Einstein condensate and supercurrents over a wide temperature range | Magnon Bose-Einstein Condensates (BECs) and supercurrents are coherent
quantum phenomena, which appear on a macroscopic scale in parametrically
populated solid state spinsystems. One of the most fascinating and attractive
features of these processes is the possibility of magnon condensation and
supercurrent excitation ... | 1907.08805v1 |
2019-07-21 | Explaining Retrocausality Phenomena in Quantum Mechanics using a Modified Variational Principle | A modified lagrangian with causal and retrocausal momenta was used to derive
a first causal wave equation and a second retrocausal wave equation using the
principle of least action. The retrocausal wave function obtained through this
method was found to be equivalent to the complex conjugate of the causal wave
function... | 1907.09688v3 |
2019-07-23 | Global wellposedness to the $n$-dimensional compressible Oldroyd-B model without damping mechanism | The Cauchy problem of the compressible Oldroyd-B model without damping
mechanism in R^n$ with $n\ge2$ is considered. The lack of dissipation in
density and stress tensor in the model is compensated by exploiting an
intrinsic structure and introducing new quantities between density, velocity
and stress tensor. Therefore... | 1907.09829v3 |
2019-10-02 | Exponential stability for the nonlinear Schrödinger equation with locally distributed damping | In this paper, we study the defocusing nonlinear Schr\"{o}dinger equation
with a locally distributed damping on a smooth bounded domain as well as on the
whole space and on an exterior domain. We first construct approximate solutions
using the theory of monotone operators. We show that approximate solutions
decay expon... | 1910.00921v1 |
2019-10-07 | Quantum mechanics at high redshift -- Modelling Damped Lyman-$α$ absorption systems | For around 100 years, hydrogen spectral modelling has been based on Voigt
profile fitting. The semi-classical Voigt profile is based on a 2-level atom
approximation. Whilst the Voigt profile is excellent for many circumstances,
the accuracy is insufficient for very high column density damped Lyman-$\alpha$
absorption s... | 1910.02913v2 |
2019-10-12 | Almost Global Solutions to the Three-dimensional Isentropic Inviscid Flows with Damping in Physical Vacuum Around Barenlatt Solutions | For the three-dimensional vacuum free boundary problem with physical
singularity that the sound speed is $C^{ {1}/{2}}$-H$\ddot{\rm o}$lder
continuous across the vacuum boundary of the compressible Euler equations with
damping, without any symmetry assumptions, we prove the almost global existence
of smooth solutions w... | 1910.05516v1 |
2019-10-15 | Nonlocal quantum correlations under amplitude damping decoherence | Different nonlocal quantum correlations of entanglement, steering and Bell
nonlocality are defined with the help of local hidden state (LHS) and local
hidden variable (LHV) models. Considering their unique roles in quantum
information processing, it is of importance to understand the individual
nonlocal quantum correla... | 1910.06483v1 |
2019-10-17 | The linearly damped nonlinear Schrödinger equation with localized driving: spatiotemporal decay estimates and the emergence of extreme wave events | We prove spatiotemporal algebraically decaying estimates for the density of
the solutions of the linearly damped nonlinear Schr\"odinger equation with
localized driving, when supplemented with vanishing boundary conditions. Their
derivation is made via a scheme, which incorporates suitable weighted Sobolev
spaces and a... | 1910.08425v2 |
2019-10-24 | Gapless and gapped holographic phonons | We study a holographic model where translations are both spontaneously and
explicitly broken, leading to the presence of (pseudo)-phonons in the spectrum.
The weak explicit breaking is due to two independent mechanisms: a small source
for the condensate itself and additional linearly space-dependent marginal
operators.... | 1910.11330v2 |
2019-12-02 | Boundary input-to-state stabilization of a damped Euler-Bernoulli beam in the presence of a state-delay | This paper is concerned with the point torque boundary feedback stabilization
of a damped Euler-Bernoulli beam model in the presence of a time-varying
state-delay. First, a finite-dimensional truncated model is derived by spectral
reduction. Then, for a given stabilizing state-feedback of the delay-free
truncated model... | 1912.01117v1 |
2019-12-03 | The noise fluxes produced by the degree of first-order temporal coherence in a single mode class-A laser amplifier | The noise feature of a single mode class-A laser is investigated in the
presence (amplifier) and absence (free-running) of an input signal. The
Maxwell-Bloch equations of motion have been solved after adding the cavity
Langevin force to calculate fluctuations that imposed to the atomic population
inversion and the ampl... | 1912.01485v1 |
2019-12-05 | A Fast Implementation for the Canonical Polyadic Decomposition | A new implementation of the canonical polyadic decomposition (CPD) is
presented. It features lower computational complexity and memory usage than the
available state of art implementations available. The CPD of tensors is a
challenging problem which has been approached in several manners. Alternating
least squares algo... | 1912.02366v1 |
2019-12-05 | Damping of spinful excitons in LaCoO$_3$ by thermal fluctuations: Theory and experiment | We present Co $L_3$-edge resonant inelastic x-ray scattering (RIXS) of bulk
LaCoO$_3$ across the thermally-induced spin-state crossover around 100~K. Owing
to a high energy resolution of 25~meV, we observe unambiguously the dispersion
of the intermediate-spin (IS) excitations in the low temperature regime.
Approaching ... | 1912.02564v3 |
2019-12-09 | High Frequency Sound in a Unitary Fermi Gas | We present an experimental and theoretical study of the phonon mode in a
unitary Fermi gas. Using two-photon Bragg spectroscopy, we measure excitation
spectra at a momentum of approximately half the Fermi momentum, both above and
below the superfluid critical temperature $T_\mathrm{c}$. Below $T_\mathrm{c}$,
the domina... | 1912.03830v1 |
2019-12-11 | Quasinormal Modes of Charged Fields in Reissner-Nordstrom Backgrounds by Borel-Pade Summation of Bender-Wu Series | We extend recent work of Hatsuda on the computation of quasinormal mode
frequencies via analytic continuation of bound state energies and Borel-Pade
resummation of the Bender-Wu perturbation series to the case of charged fields
in the background of Reissner-Nordstrom black holes. We compare the quasinormal
mode frequen... | 1912.05553v2 |
2019-12-19 | On twin peak quasi-periodic oscillations resulting from the interaction between discoseismic modes and turbulence in accretion discs around black holes | Given the peculiar and (in spite of many efforts) unexplained quasi-periodic
oscillation (QPO) twin peak phenomena in accretion disc PSD observations, the
present exploratory analytical article tries to inquire deeper into the
relationship between discoseismic modes and the underlying driving turbulence
in order to ass... | 1912.09527v1 |
2019-12-28 | Non-linear damping of superimposed primordial oscillations on the matter power spectrum in galaxy surveys | Galaxy surveys are an important probe for superimposed oscillations on the
primordial power spectrum of curvature perturbations, which are predicted in
several theoretical models of inflation and its alternatives. In order to
exploit the full cosmological information in galaxy surveys it is necessary to
study the matte... | 1912.12499v3 |
2020-03-01 | Optimal Oscillation Damping Control of cable-Suspended Aerial Manipulator with a Single IMU Sensor | This paper presents a design of oscillation damping control for the
cable-Suspended Aerial Manipulator (SAM). The SAM is modeled as a double
pendulum, and it can generate a body wrench as a control action. The main
challenge is the fact that there is only one onboard IMU sensor which does not
provide full information o... | 2003.00472v1 |
2020-03-06 | Accelerating the Convergence of Higher-Order Coupled Cluster Methods II: Coupled Cluster $Λ$ Equations and Dynamic Damping | The method of sub-iteration, which was previously applied to the higher-order
coupled cluster amplitude equations, is extended to the case of the coupled
cluster $\Lambda$ equations. The sub-iteration procedure for the $\Lambda$
equations is found to be highly similar to that for the amplitude equations,
and to exhibit... | 2003.03455v1 |
2020-03-09 | Forces between Silica Particles in Isopropanol Solutions of 1:1 Electrolytes | Interactions between silica surfaces across isopropanol solutions are
measured with colloidal probe technique based on atomic force microscope. In
particular, the influence of 1:1 electrolytes on the interactions between
silica particles is investigated. A plethora of different forces are found in
these systems. Namely... | 2003.04058v2 |
2020-03-13 | Energy localization and transfer in autoresonant weakly dissipative anharmonic chains | In this work, we develop an analytical framework to explain the influence of
dissipation and detuning parameters on the emergence and stability of
autoresonance in a strongly nonlinear weakly damped chain subjected to harmonic
forcing with a slowly-varying frequency. Using the asymptotic procedures, we
construct the ev... | 2003.06346v1 |
2020-03-13 | Photon and Phonon Spectral-Functions for Continuum Quantum Optomechanics | We study many-particle phenomena of propagating multi-mode photons and
phonons interacting through Brillouin scattering-type Hamiltonian in nanoscale
waveguides. We derive photon and phonon retarded Green's functions and extract
their spectral functions in applying the factorization approximation of the
mean-field theo... | 2003.06355v1 |
2020-03-13 | Surface waves in a collisional quark-gluon plasma | Surface waves propagating in the semi-bounded collisional hot QCD medium
(quark-gluon plasma) are considered. To investigate the effect of collisions as
damping and non-ideality factor, the longitudinal and transverse dielectric
functions of the quark-gluon plasma are used within the Bhatnagar-Gross-Krook
(BGK) approac... | 2003.06373v2 |
2020-03-18 | Finite time extinction for the strongly damped nonlinear Schr{ö}dinger equation in bounded domains | We prove the \textit{finite time extinction property} $(u(t)\equiv 0$ on
$\Omega$ for any $t\ge T_\star,$ for some $T_\star>0)$ for solutions of the
nonlinear Schr\"{o}dinger problem ${\rm i} u_t+\Delta u+a|u|^{-(1-m)}u=f(t,x),$
on a bounded domain $\Omega$ of $\mathbb{R}^N,$ $N\le 3,$ $a\in\mathbb{C}$ with
$\Im(a)>0$ ... | 2003.08105v2 |
2020-03-19 | Challenge for describing the cluster states starting with realistic interaction | We aim to describe the cluster states of nuclear systems starting with a
realistic interaction, which is a challenge of modern nuclear theories. Here,
the short-range correlation of realistic interaction is treated by employing
the damping factor, and the resultant interaction can be applied to the cluster
structure of... | 2003.08546v1 |
2020-03-20 | Large Deflections of A Structurally Damped Panel in A Subsonic Flow | The large deflections of panels in subsonic flow are considered.
Specifically, a fully clamped von Karman plate accounting for both rotational
inertia in plate filaments and structural damping of square root type is
considered. The panel is taken to be embedded in the boundary of a linear,
subsonic potential flow on th... | 2003.09232v1 |
2020-03-24 | Pulsed RF Schemes for Tearing Mode Stabilization | The RF stabilization of tearing modes with current condensation has the
potential to increase stabilization efficiency and loosen power localization
requirements. Such benefits stem from the cooperative feedback between the RF
deposition and resulting island temperature perturbation governed by diffusion.
A self consis... | 2003.10896v1 |
2020-03-24 | Detecting Multiple DLAs per Spectrum in SDSS DR12 with Gaussian Processes | We present a revised version of our automated technique using Gaussian
processes (GPs) to detect Damped Lyman-$\alpha$ absorbers (DLAs) along quasar
(QSO) sightlines. The main improvement is to allow our Gaussian process
pipeline to detect multiple DLAs along a single sightline. Our DLA detections
are regularised by an... | 2003.11036v2 |
2020-03-28 | Quantum speed limit based on the bound of Bures angle | In this paper, we investigate the unified bound of quantum speed limit time
in open systems based on the modified Bures angle. This bound is applied to the
damped Jaynes-Cummings model and the dephasing model, and the analytical
quantum speed limit time is obtained for both models. As an example, the
maximum coherent q... | 2003.12758v1 |
2020-03-31 | First-principles study of ultrafast dynamics of Dirac plasmon in graphene | Exploring low-loss two-dimensional plasmon modes is considered central for
achieving light manipulation at the nanoscale and applications in plasmonic
science and technology. In this context, pump-probe spectroscopy is a powerful
tool for investigating these collective modes and the corresponding energy
transfer proces... | 2003.14074v2 |
2020-03-31 | Parametric analysis of COVID-19 expansion in European countries in the period of February to June 2020 | The data on number of registered cases of COVID-19 disease in twenty European
countries is analyzed by the least-squares fitting procedure with generic
analytic functions. Three regimes of the expansion of the disease are
identified and quantified -- early exponential expansion, damped exponential,
and linear expansion... | 2003.14283v2 |
2020-08-13 | Using Machine Learning to Find Ghostly Damped Ly$α$ Systems in SDSS DR14 | We report the discovery of 59 new ghostly absorbers from the Sloan Digital
Sky Survey (SDSS) Data Release 14 (DR14). These absorbers, with $z_{\rm
abs}$$\sim$$z_{\rm QSO}$, reveal no Ly$\alpha$ absorption, and they are mainly
identified through the detection of strong metal absorption lines in the
spectra. The number o... | 2008.05910v1 |
2020-08-15 | $L^1$-convergence to generalized Barenblatt solution for compressible Euler equations with time-dependent damping | The large time behavior of entropy solution to the compressible Euler
equations for polytropic gas (the pressure $p(\rho)=\kappa\rho^{\gamma},
\gamma>1$) with time dependent damping like $-\frac{1}{(1+t)^\lambda}\rho u$
($0<\lambda<1$) is investigated. By introducing an elaborate iterative method
and using the intensiv... | 2008.06704v1 |
2020-08-21 | Structure preserving algorithms for simulation of linearly damped acoustic systems | Energy methods for constructing time-stepping algorithms are of increased
interest in application to nonlinear problems, since numerical stability can be
inferred from the conservation of the system energy. Alternatively, symplectic
integrators may be constructed that preserve the symplectic form of the system.
This me... | 2008.09479v1 |
2020-08-24 | The move from Fujita to Kato type exponent for a class of semilinear evolution equations with time-dependent damping | In this paper, we derive suitable optimal $L^p-L^q$ decay estimates, $1\leq
p\leq 2\leq q\leq \infty$, for the solutions to the $\sigma$-evolution
equation, $\sigma>1$, with scale-invariant time-dependent damping and power
nonlinearity~$|u|^p$, \[ u_{tt}+(-\Delta)^\sigma u + \frac{\mu}{1+t} u_t=
|u|^{p}, \] where $\mu>... | 2008.10374v1 |
2020-09-01 | On the decay in $W^{1,\infty}$ for the 1D semilinear damped wave equation on a bounded domain | In this paper we study a semilinear wave equation with nonlinear,
time-dependent damping in one space dimension. For this problem, we prove a
well-posedness result in $W^{1,\infty}$ in the space-time domain $(0,1)\times
[0,+\infty)$. Then we address the problem of the time-asymptotic stability of
the zero solution and ... | 2009.00731v2 |
2020-09-08 | Nanomechanical damping via electron-assisted relaxation of two-level systems | We report on measurements of dissipation and frequency noise at millikelvin
temperatures of nanomechanical devices covered with aluminum. A clear excess
damping is observed after switching the metallic layer from superconducting to
the normal state with a magnetic field. Beyond the standard model of internal
tunneling ... | 2009.03804v3 |
2020-09-10 | Inclination damping on Callisto | Callisto is thought to possess a subsurface ocean, which will dissipate
energy due to obliquity tides. This dissipation should have damped any
primordial inclination within 1 Gyr - and yet Callisto retains a present-day
inclination. We argue that Callisto's inclination and eccentricity were both
excited in the relative... | 2009.05002v1 |
2020-09-25 | Sound in a system of chiral one-dimensional fermions | We consider a system of one-dimensional fermions moving in one direction,
such as electrons at the edge of a quantum Hall system. At sufficiently long
time scales the system is brought to equilibrium by weak interactions between
the particles, which conserve their total number, energy, and momentum. Time
evolution of t... | 2009.12364v1 |
2020-09-30 | Dynamical properties of a driven dissipative dimerized $S = 1/2$ chain | We consider the dynamical properties of a gapped quantum spin system coupled
to the electric field of a laser, which drives the resonant excitation of
specific phonon modes that modulate the magnetic interactions. We deduce the
quantum master equations governing the time-evolution of both the lattice and
spin sectors, ... | 2009.14805v2 |
2020-10-02 | Parametric instability in a free evolving warped protoplanetary disc | Warped accretion discs of low viscosity are prone to hydrodynamic instability
due to parametric resonance of inertial waves as confirmed by local
simulations. Global simulations of warped discs, using either smoothed particle
hydrodynamics (SPH) or grid-based codes, are ubiquitous but no such instability
has been seen.... | 2010.00862v2 |
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