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2020-05-13 | Periodically Forced Nonlinear Oscillators With Hysteretic Damping | We perform a detailed study of the dynamics of a nonlinear, one-dimensional
oscillator driven by a periodic force under hysteretic damping, whose linear
version was originally proposed and analyzed by Bishop in [1]. We first add a
small quadratic stiffness term in the constitutive equation and construct the
periodic so... | 2005.06187v1 |
2020-05-13 | Magnetic circular dichroism spectra from resonant and damped coupled cluster response theory | A computational expression for the Faraday A term of magnetic circular
dichroism (MCD) is derived within coupled cluster response theory and
alternative computational expressions for the B term are discussed. Moreover,
an approach to compute the (temperature-independent) MCD ellipticity in the
context of coupled cluste... | 2005.06190v1 |
2020-05-21 | Convective Excitation and Damping of Solar-like Oscillations | The last decade has seen a rapid development in asteroseismology thanks to
the CoRoT and Kepler missions. With more detailed asteroseismic observations
available, it is becoming possible to infer exactly how oscillations are driven
and dissipated in solar-type stars. We have carried out three-dimensional (3D)
stellar a... | 2005.10519v1 |
2020-05-21 | Non-Markovian memory in a measurement-based quantum computer | We study the exact open system dynamics of single qubit gates during a
measurement-based quantum computation considering non-Markovian environments.
We obtain analytical solutions for the average gate fidelities and analyze it
for amplitude damping and dephasing channels. We show that the average fidelity
is identical ... | 2005.10883v1 |
2020-05-22 | Improving Dynamic Performance of Low-Inertia Systems through Eigensensitivity Optimization | An increasing penetration of renewable generation has led to reduced levels
of rotational inertia and damping in the system. The consequences are higher
vulnerability to disturbances and deterioration of the dynamic response of the
system. To overcome these challenges, novel converter control schemes that
provide virtu... | 2005.11032v1 |
2020-05-24 | Theory of Solutions for An Inextensible Cantilever | Recent equations of motion for the large deflections of a cantilevered
elastic beam are analyzed. In the traditional theory of beam (and plate) large
deflections, nonlinear restoring forces are due to the effect of stretching on
bending; for an inextensible cantilever, the enforcement of arc-length
preservation leads t... | 2005.11836v2 |
2020-05-25 | Nonlinear losses in magnon transport due to four-magnon scattering | We report on the impact of nonlinear four-magnon scattering on magnon
transport in microstructured Co25Fe75 waveguides with low magnetic damping. We
determine the magnon propagation length with microfocused Brillouin light
scattering over a broad range of excitation powers and detect a decrease of the
attenuation lengt... | 2005.12113v2 |
2020-06-02 | Rigid body dynamics of diamagnetically levitating graphite resonators | Diamagnetic levitation is a promising technique for realizing resonant
sensors and energy harvesters, since it offers thermal and mechanical isolation
from the environment at zero power. To advance the application of
diamagnetically levitating resonators, it is important to characterize their
dynamics in the presence o... | 2006.01733v3 |
2020-06-11 | Signatures of Spatial Curvature on Growth of Structures | We write down Boltzmann equation for massive particles in a spatially curved
FRW universe and solve the approximate line-of-sight solution for evolution of
matter density, including the effects of spatial curvature to the first order
of approximation. It is shown that memory of early time gravitational potential
is aff... | 2006.06347v2 |
2020-06-29 | HFQPOs and discoseismic mode excitation in eccentric, relativistic discs. II. Magnetohydrodynamic simulations | Trapped inertial oscillations (r-modes) provide a promising explanation for
high-frequency quasi-periodic oscillations (HFQPOs) observed in the emission
from black hole X-ray binary systems. An eccentricity (or warp) can excite
r-modes to large amplitudes, but concurrently the oscillations are likely
damped by magnetoh... | 2006.16266v2 |
2020-07-01 | An integrable family of torqued, damped, rigid rotors | Expositions of the Euler equations for the rotation of a rigid body often
invoke the idea of a specially damped system whose energy dissipates while its
angular momentum magnitude is conserved in the body frame. An attempt to
explicitly construct such a damping function leads to a more general, but still
integrable, sy... | 2007.00707v1 |
2020-07-10 | Approximate Time-Optimal Trajectories for Damped Double Integrator in 2D Obstacle Environments under Bounded Inputs | This article provides extensions to existing path-velocity decomposition
based time optimal trajectory planning algorithm \cite{kant1986toward} to
scenarios in which agents move in 2D obstacle environment under double
integrator dynamics with drag term (damped double integrator). Particularly, we
extend the idea of a t... | 2007.05155v2 |
2020-08-11 | Ab initio results for the plasmon dispersion and damping of the warm dense electron gas | Warm dense matter (WDM) is an exotic state on the border between condensed
matter and dense plasmas. Important occurrences of WDM include dense
astrophysical objects, matter in the core of our Earth, as well as matter
produced in strong compression experiments. As of late, x-ray Thomson
scattering has become an advance... | 2008.04605v1 |
2020-08-18 | Singularity formation for compressible Euler equations with time-dependent damping | In this paper, we consider the compressible Euler equations with
time-dependent damping \frac{\a}{(1+t)^\lambda}u in one space dimension. By
constructing 'decoupled' Riccati type equations for smooth solutions, we
provide some sufficient conditions under which the classical solutions must
break down in finite time. As ... | 2008.07756v1 |
2020-08-18 | Survey of 360$^{\circ}$ domain walls in magnetic heterostructures: topology, chirality and current-driven dynamics | Chirality and current-driven dynamics of topologically nontrivial
360$^{\circ}$ domain walls (360DWs) in magnetic heterostructures (MHs) are
systematically investigated. For MHs with normal substrates, the static 360DWs
are N\'{e}el-type with no chirality. While for those with heavy-metal
substrates, the interfacial Dz... | 2008.08196v1 |
2020-08-20 | Combining $T_1$ and $T_2$ estimation with randomized benchmarking and bounding the diamond distance | The characterization of errors in a quantum system is a fundamental step for
two important goals. First, learning about specific sources of error is
essential for optimizing experimental design and error correction methods.
Second, verifying that the error is below some threshold value is required to
meet the criteria ... | 2008.09197v1 |
2020-08-25 | The atomic damping basis and the collective decay of interacting two-level atoms | We find analytical solutions to the evolution of interacting two-level atoms
when the master equation is symmetric under the permutation of atomic labels.
The master equation includes atomic independent dissipation. The method to
obtain the solutions is: First, we use the system symmetries to describe the
evolution in ... | 2008.11056v1 |
2020-09-11 | Accuracy of relativistic Cowling approximation in protoneutron star asteroseismology | The relativistic Cowling approximation, where the metric perturbations are
neglected during the fluid oscillations, is often adopted for considering the
gravitational waves from the protoneutron stars (PNSs) provided via
core-collapse supernova explosions. In this study, we evaluate how the Cowling
approximation works ... | 2009.05206v1 |
2020-09-17 | Resonant absorption: transformation of compressive motions into vortical motions | This paper investigates the changes in spatial properties when
magnetohydrodynamic (MHD) waves undergo resonant damping in the Alfv\'en
continuum. The analysis is carried out for a 1D cylindrical pressure-less
plasma with a straight magnetic field. The effect of the damping on the spatial
wave variables is determined b... | 2009.08152v1 |
2020-09-19 | Random vibrations of stress-driven nonlocal beams with external damping | Stochastic flexural vibrations of small-scale Bernoulli-Euler beams with
external damping are investigated by stress-driven nonlocal mechanics. Damping
effects are simulated considering viscous interactions between beam and
surrounding environment. Loadings are modeled by accounting for their random
nature. Such a dyna... | 2009.09184v1 |
2020-09-20 | Correction Method for the Readout Saturation of the DAMPE Calorimeter | The DArk Matter Particle Explorer (DAMPE) is a space-borne high energy
cosmic-ray and $\gamma$-ray detector which operates smoothly since the launch
on December 17, 2015. The bismuth germanium oxide (BGO) calorimeter is one of
the key sub-detectors of DAMPE used for energy measurement and electron proton
identification... | 2009.09438v1 |
2020-09-21 | Complete complementarity relations in system-environment decoherent dynamics | We investigate the system-environment information flow from the point of view
ofcomplete complementarity relations. We consider some commonly used noisy
quantum channels:Amplitude damping, phase damping, bit flip, bit-phase flip,
phase flip, depolarizing, and correlatedamplitude damping. By starting with an
entangled b... | 2009.09769v3 |
2020-09-15 | Delay-induced resonance suppresses damping-induced unpredictability | Combined effects of the damping and forcing in the underdamped time-delayed
Duffing oscillator are considered in this paper. We analyze the generation of a
certain damping-induced unpredictability, due to the gradual suppression of
interwell oscillations. We find the minimal amount of the forcing amplitude and
the righ... | 2009.11760v1 |
2020-10-06 | A dissiptive logarithmic type evolution equation: asymptotic profile and optimal estimates | We introduce a new model of the logarithmic type of wave-like equation with a
nonlocal logarithmic damping mechanism, which is rather weakly effective as
compared with frequently studied fractional damping cases. We consider the
Cauchy problem for this new model in the whole space, and study the asymptotic
profile and ... | 2010.02485v1 |
2020-10-12 | Line-drag damping of Alfvén waves in radiatively driven winds of magnetic massive stars | Line-driven stellar winds from massive (OB) stars are subject to a strong
line-deshadowing instability. Recently, spectropolarimetric surveys have
collected ample evidence that a subset of Galactic massive stars hosts strong
surface magnetic fields. We investigate here the propagation and stability of
magneto-radiative... | 2010.05650v1 |
2020-10-20 | Long Time Behavior of a Quasilinear Hyperbolic System Modelling Elastic Membranes | The paper studies the long time behavior of a system that describes the
motion of a piece of elastic membrane driven by surface tension and inner air
pressure. The system is a degenerate quasilinear hyperbolic one that involves
the mean curvature, and also includes a damping term that models the
dissipative nature of g... | 2010.10663v6 |
2020-10-09 | Rapid parameter determination of discrete damped sinusoidal oscillations | We present different computational approaches for the rapid extraction of the
signal parameters of discretely sampled damped sinusoidal signals. We compare
time- and frequency-domain-based computational approaches in terms of their
accuracy and precision and computational time required in estimating the
frequencies of ... | 2010.11690v1 |
2020-10-22 | Effective shear and bulk viscosities for anisotropic flow | We evaluate the viscous damping of anisotropic flow in heavy-ion collisions
for arbitrary temperature-dependent shear and bulk viscosities. We show that
the damping is solely determined by effective shear and bulk viscosities, which
are weighted averages over the temperature. We determine the relevant weights
for nucle... | 2010.11919v2 |
2020-10-23 | Is PSR J0855$-$4644 responsible for the 1.4 TeV electron spectral bump hinted by DAMPE? | DAMPE observation on the cosmic ray electron spectrum hints a narrow excess
at $\sim$ 1.4 TeV. Although the excess can be ascribed to dark matter
particles, pulsars and pulsar wind nebulae are believed to be a more natural
astrophysical origin: electrons injected from nearby pulsars at their early
ages can form a bump-... | 2010.12170v1 |
2020-11-02 | Effect of retardation on the frequency and linewidth of plasma resonances in a two-dimensional disk of electron gas | We theoretically analyze dominant plasma modes in a two-dimensional disk of
electron gas by calculating the absorption of an incident electromagnetic wave.
The problem is solved in a self-consistent approximation, taking into account
electromagnetic retardation effects. We use the Drude model to describe the
conductivi... | 2011.00877v1 |
2020-11-05 | Low-Complexity Models for Acoustic Scene Classification Based on Receptive Field Regularization and Frequency Damping | Deep Neural Networks are known to be very demanding in terms of computing and
memory requirements. Due to the ever increasing use of embedded systems and
mobile devices with a limited resource budget, designing low-complexity models
without sacrificing too much of their predictive performance gained great
importance. I... | 2011.02955v1 |
2020-11-14 | Learning a Reduced Basis of Dynamical Systems using an Autoencoder | Machine learning models have emerged as powerful tools in physics and
engineering. Although flexible, a fundamental challenge remains on how to
connect new machine learning models with known physics. In this work, we
present an autoencoder with latent space penalization, which discovers finite
dimensional manifolds und... | 2011.07346v1 |
2020-11-23 | Sharp lifespan estimates for the weakly coupled system of semilinear damped wave equations in the critical case | The open question, which seems to be also the final part, in terms of
studying the Cauchy problem for the weakly coupled system of damped wave
equations or reaction-diffusion equations, is so far known as the sharp
lifespan estimates in the critical case. In this paper, we mainly investigate
lifespan estimates for solu... | 2011.11366v2 |
2020-12-10 | Stochastic Damped L-BFGS with Controlled Norm of the Hessian Approximation | We propose a new stochastic variance-reduced damped L-BFGS algorithm, where
we leverage estimates of bounds on the largest and smallest eigenvalues of the
Hessian approximation to balance its quality and conditioning. Our algorithm,
VARCHEN, draws from previous work that proposed a novel stochastic damped
L-BFGS algori... | 2012.05783v1 |
2020-12-29 | Twist-induced Near-field Thermal Switch Using Nonreciprocal Surface Magnon-Polaritons | We explore that two ferromagnetic insulator slabs host a strong twist-induced
near-field radiative heat transfer in the presence of twisted magnetic fields.
Using the formalism of fluctuational electrodynamics, we find the existence of
large twist-induced thermal switch ratio in large damping condition and
nonmonotonic... | 2012.14733v1 |
2021-01-04 | The damped harmonic oscillator at the classical limit of the Snyder-de Sitter space | Valtancoli in his paper entitled [P. Valtancoli, Canonical transformations,
and minimal length J. Math. Phys. 56, 122107 (2015)] has shown how the
deformation of the canonical transformations can be made compatible with the
deformed Poisson brackets. Based on this work and through an appropriate
canonical transformatio... | 2101.01223v2 |
2021-01-11 | Damped (linear) response theory within the resolution-of-identity coupled cluster singles and approximate doubles (RI-CC2) method | An implementation of a complex solver for the solution of the response
equations required to compute the complex response functions of damped response
theory is presented for the resolution-of-identity (RI) coupled-cluster singles
and approximate doubles CC2 method. The implementation uses a partitioned
formulation tha... | 2101.03756v1 |
2021-01-26 | Generalized Damped Newton Algorithms in Nonsmooth Optimization via Second-Order Subdifferentials | The paper proposes and develops new globally convergent algorithms of the
generalized damped Newton type for solving important classes of nonsmooth
optimization problems. These algorithms are based on the theory and
calculations of second-order subdifferentials of nonsmooth functions with
employing the machinery of sec... | 2101.10555v3 |
2021-01-26 | Damped and Driven Breathers and Metastability | In this article we prove the existence of a new family of periodic solutions
for discrete, nonlinear Schrodinger equations subject to spatially localized
driving and damping. They provide an alternate description of the metastable
behavior in such lattice systems which agrees with previous predictions for the
evolution... | 2101.10999v2 |
2021-02-05 | A simple artificial damping method for total Lagrangian smoothed particle hydrodynamics | In this paper, we present a simple artificial damping method to enhance the
robustness of total Lagrangian smoothed particle hydrodynamics (TL-SPH).
Specifically, an artificial damping stress based on the Kelvin-Voigt type
damper with a scaling factor imitating a von Neumann-Richtmyer type artificial
viscosity is intro... | 2102.04898v1 |
2021-02-18 | Probing black hole microstructure with the kinetic turnover of phase transition | By treating black hole as the macroscopic stable state on the free energy
landscape, we propose that the stochastic dynamics of the black hole phase
transition can be effectively described by the Langevin equation or
equivalently by the Fokker-Planck equation in phase space. We demonstrate the
turnover of the kinetics ... | 2102.09439v1 |
2021-02-25 | Energy Decay of some boundary coupled systems involving wave$\backslash$ Euler-Bernoulli beam with one locally singular fractional Kelvin-Voigt damping | In this paper, we investigate the energy decay of hyperbolic systems of
wave-wave, wave-Euler- Bernoulli beam and beam-beam types. The two equations
are coupled through boundary connection with only one localized non-smooth
fractional Kelvin-Voigt damping. First, we reformulate each system into an
augmented model and u... | 2102.12732v2 |
2021-03-01 | Fluid-plate interaction under periodic forcing | The motion of a thin elastic plate interacting with a viscous fluid is
investigated. A periodic force acting on the plate is considered, which in a
setting without damping could lead to a resonant response. The interaction with
the viscous fluid provides a damping mechanism due to the energy dissipation in
the fluid. M... | 2103.00795v1 |
2021-03-25 | Nonlinear inviscid damping and shear-buoyancy instability in the two-dimensional Boussinesq equations | We investigate the long-time properties of the two-dimensional inviscid
Boussinesq equations near a stably stratified Couette flow, for an initial
Gevrey perturbation of size $\varepsilon$. Under the classical Miles-Howard
stability condition on the Richardson number, we prove that the system
experiences a shear-buoyan... | 2103.13713v1 |
2021-03-31 | Research of Damped Newton Stochastic Gradient Descent Method for Neural Network Training | First-order methods like stochastic gradient descent(SGD) are recently the
popular optimization method to train deep neural networks (DNNs), but
second-order methods are scarcely used because of the overpriced computing cost
in getting the high-order information. In this paper, we propose the Damped
Newton Stochastic G... | 2103.16764v1 |
2021-04-08 | Landau Damping in the Transverse Modulational Dynamics of Co-Propagating Light and Matter Beams | The optomechanical coupling and transverse stability of a co-propagating
monochromatic electromagnetic wave and mono-energetic beam of two-level atoms
is investigated in the collisionless regime. The coupled dynamics are studied
through a Landau stability analysis of the coupled gas- kinetic and paraxial
wave equations... | 2104.04100v1 |
2021-04-15 | Simulating cosmological supercooling with a cold atom system II | We perform an analysis of the supercooled state in an analogue of an early
universe phase transition based on a one dimensional, two-component Bose gas
with time-dependent interactions. We demonstrate that the system behaves in the
same way as a thermal, relativistic Bose gas undergoing a first order phase
transition. ... | 2104.07428v1 |
2021-04-29 | Nano-patterning of surfaces by ion sputtering: Numerical study of the anisotropic damped Kuramoto-Sivashinsky equation | Nonlinear models for pattern evolution by ion beam sputtering on a material
surface present an ongoing opportunity for new numerical simulations. A
numerical analysis of the evolution of preexisting patterns is proposed to
investigate surface dynamics, based on a 2D anisotropic damped
Kuramoto-Sivashinsky equation, wit... | 2104.14104v1 |
2021-05-04 | Linear response theory and damped modes of stellar clusters | Because all stars contribute to its gravitational potential, stellar clusters
amplify perturbations collectively. In the limit of small fluctuations, this is
described through linear response theory, via the so-called response matrix.
While the evaluation of this matrix is somewhat straightforward for unstable
modes (i... | 2105.01371v1 |
2021-05-10 | Passivity-based control of mechanical systems with linear damping identification | We propose a control approach for a class of nonlinear mechanical systems to
stabilize the system under study while ensuring that the oscillations of the
transient response are reduced. The approach is twofold: (i) we apply our
technique for linear viscous damping identification of the system to improve
the accuracy of... | 2105.04324v4 |
2021-05-26 | Decay dynamics of Localised Surface Plasmons: damping of coherences and populations of the oscillatory plasmon modes | Properties of plasmonic materials are associated with surface plasmons - the
electromagnetic excitations coupled to coherent electron charge density
oscillations on a metal/dielectric interface. Although decay of such
oscillations cannot be avoided, there are prospects for controlling plasmon
damping dynamics. In spher... | 2105.12463v1 |
2021-06-05 | The electron acoustic waves in plasmas with two kappa-distributed electrons at the same temperatures and immobile ions | The linear electron acoustic waves propagating in plasmas with two
kappa-distributed electrons and stationary ions are investigated. The
temperatures of the two electrons are assumed to be the same, but the kappa
indices are not. It shows that if one kappa index is small enough and the other
one is large enough, a weak... | 2106.02910v2 |
2021-06-18 | Global existence and asymptotic behavior for semilinear damped wave equations on measure spaces | This paper is concerned with the semilinear damped wave equation on a measure
space with a self-adjoint operator, instead of the standard Laplace operator.
Under a certain decay estimate on the corresponding heat semigroup, we
establish the linear estimates which generalize the so-called Matsumura
estimates, and prove ... | 2106.10322v3 |
2021-06-21 | On the small time asymptotics of stochastic Ladyzhenskaya-Smagorinsky equations with damping perturbed by multiplicative noise | The Ladyzhenskaya-Smagorinsky equations model turbulence phenomena, and are
given by $$\frac{\partial \boldsymbol{u}}{\partial t}-\mu
\mathrm{div}\left(\left(1+|\nabla\boldsymbol{u}|^2\right)^{\frac{p-2}{2}}\nabla\boldsymbol{u}\right)+(\boldsymbol{u}\cdot\nabla)\boldsymbol{u}+\nabla
p=\boldsymbol{f}, \ \nabla\cdot\bold... | 2106.10861v1 |
2021-06-23 | Improved convergence rates and trajectory convergence for primal-dual dynamical systems with vanishing damping | In this work, we approach the minimization of a continuously differentiable
convex function under linear equality constraints by a second-order dynamical
system with asymptotically vanishing damping term. The system is formulated in
terms of the augmented Lagrangian associated to the minimization problem. We
show fast ... | 2106.12294v1 |
2021-06-24 | Landau damping of electron-acoustic waves due to multi-plasmon resonances | The linear and nonlinear theories of electron-acoustic waves (EAWs) are
studied in a partially degenerate quantum plasma with two-temperature electrons
and stationary ions. The initial equilibrium of electrons is assumed to be
given by the Fermi-Dirac distribution at finite temperature. By employing the
multi-scale asy... | 2106.12754v2 |
2021-07-01 | On behavior of solutions to a Petrovsky equation with damping and variable-exponent source | This paper deals with the following Petrovsky equation with damping and
nonlinear source \[u_{tt}+\Delta^2 u-M(\|\nabla u\|_2^2)\Delta u-\Delta
u_t+|u_t|^{m(x)-2}u_t=|u|^{p(x)-2}u\] under initial-boundary value conditions,
where $M(s)=a+ bs^\gamma$ is a positive $C^1$ function with parameters
$a>0,~b>0,~\gamma\geq 1$, ... | 2107.00273v2 |
2021-07-21 | A combined volume penalization / selective frequency damping approach for immersed boundary methods applied to high-order schemes | There has been an increasing interest in developing efficient immersed
boundary method (IBM) based on Cartesian grids, recently in the context of
high-order methods. IBM based on volume penalization is a robust and easy to
implement method to avoid body-fitted meshes and has been recently adapted to
high order discreti... | 2107.10177v1 |
2021-07-25 | Dispatch of Virtual Inertia and Damping: Numerical Method with SDP and ADMM | Power grids are evolving toward 100% renewable energy interfaced by
inverters. Virtual inertia and damping provided by inverters are essential to
synchronism and frequency stability of future power grids. This paper
numerically addresses the problem of dispatch of virtual inertia and damping
(DID) among inverters in th... | 2107.11764v1 |
2021-07-29 | Microscopic analysis of sound attenuation in low-temperature amorphous solids reveals quantitative importance of non-affine effects | Sound attenuation in low temperature amorphous solids originates from their
disordered structure. However, its detailed mechanism is still being debated.
Here we analyze sound attenuation starting directly from the microscopic
equations of motion. We derive an exact expression for the zero-temperature
sound damping coe... | 2107.14254v2 |
2021-08-09 | Damping perturbation based time integration asymptotic method for structural dynamics | The light damping hypothesis is usually assumed in structural dynamics since
dissipative forces are in general weak with respect to inertial and elastic
forces. In this paper a novel numerical method of time integration based on the
artificial perturbation of damping is proposed. The asymptotic expansion of the
transie... | 2108.03813v1 |
2021-08-12 | The damping and diffusion of atoms moving in the background electromagnetic environment | The interaction between an atom and the quantized electromagnetic field
depends on the position of the atom. Then the atom experiences a force which is
the minus gradient of this interaction. Through the Heisenberg equations of
motion and the Born-Markov approximation, the mean and correlation of the force
are obtained... | 2108.05590v3 |
2021-09-22 | Antibunching via cooling by heating | We investigate statistics of the photon (phonon) field undergoing linear and
nonlinear damping processes. An effective two-photon (phonon) nonlinear
"cooling by heating" process is realized from linear damping by spectral
filtering of the heat baths present in the system. This cooling process driven
by incoherent quant... | 2109.10516v2 |
2021-10-13 | Tutorial on stochastic systems | In this tutorial, three examples of stochastic systems are considered: A
strongly-damped oscillator, a weakly-damped oscillator and an undamped
oscillator (integrator) driven by noise. The evolution of these systems is
characterized by the temporal correlation functions and spectral densities of
their displacements, wh... | 2110.06966v1 |
2021-10-18 | Structured vector fitting framework for mechanical systems | In this paper, we develop a structure-preserving formulation of the
data-driven vector fitting algorithm for the case of modally damped mechanical
systems. Using the structured pole-residue form of the transfer function of
modally damped second-order systems, we propose two possible structured
extensions of the barycen... | 2110.09220v1 |
2021-10-27 | Integrability and solvability of polynomial Liénard differential systems | We provide the necessary and sufficient conditions of Liouvillian
integrability for Li\'{e}nard differential systems describing nonlinear
oscillators with a polynomial damping and a polynomial restoring force. We
prove that Li\'{e}nard differential systems are not Darboux integrable
excluding subfamilies with certain r... | 2110.14306v2 |
2021-10-28 | Global Solution to the Vacuum Free Boundary Problem with Physical Singularity of Compressible Euler Equations with Damping and Gravity | The global existence of smooth solutions to the vacuum free boundary problem
with physical singularity of compressible Euler equations with damping and
gravity is proved in space dimensions $n=1, 2, 3$, for the initial data being
small perturbations of the stationary solution. Moreover, the exponential decay
of the vel... | 2110.14909v1 |
2021-10-29 | Spinons and damped phonons in spin-1/2 quantum-liquid Ba$_{4}$Ir${}_3$O${}_{10}$ observed by Raman scattering | In spin-1/2 Mott insulators, non-magnetic quantum liquid phases are often
argued to arise when the system shows no magnetic ordering, but identifying
positive signatures of these phases or related spinon quasiparticles can be
elusive. Here we use Raman scattering to provide three signatures for spinons
in a possible sp... | 2110.15916v1 |
2021-11-03 | Pointwise space-time estimates of two-phase fluid model in dimension three | In this paper, we investigate the pointwise space-time behavior of two-phase
fluid model derived by Choi \cite{Choi} [SIAM J. Math. Anal., 48(2016), pp.
3090-3122], which is the compressible damped Euler equations coupled with
compressible Naiver-Stokes equations. Based on Green's function method together
with frequenc... | 2111.01987v1 |
2021-11-09 | Turbulent cascades for a family of damped Szegö equations | In this paper, we study the transfer of energy from low to high frequencies
for a family of damped Szeg\"o equations. The cubic Szeg\"o equation has been
introduced as a toy model for a totally non-dispersive degenerate Hamiltonian
equation. It is a completely integrable system which develops growth of high
Sobolev nor... | 2111.05247v1 |
2021-11-18 | Sharp Stability of a String with Local Degenerate Kelvin-Voigt Damping | This paper is on the asymptotic behavior of the elastic string equation with
localized degenerate Kelvin--Voigt damping $$
u_{tt}(x,t)-[u_{x}(x,t)+b(x)u_{x,t}(x,t)]_{x}=0,\; x\in(-1,1),\; t>0,$$ where
$b(x)=0$ on $x\in (-1,0]$, and $b(x)=x^\alpha>0$ on $x\in (0,1)$ for
$\alpha\in(0,1)$. It is known that the optimal dec... | 2111.09500v1 |
2021-11-22 | Global well-posedness for a generalized Keller-Segel system with degenerate dissipation and mixing | We study the mixing effect for a generalized Keller-Segel system with
degenerate dissipation and advection by a weakly mixing. Here the attractive
operator has weak singularity, namely, the negative derivative appears in the
nonlinear term by singular integral. Without advection, the solution of
equation blows up in fi... | 2111.11083v1 |
2021-11-26 | Damping of Pseudo-Goldstone Fields | Approximate symmetries abound in Nature. If these symmetries are also
spontaneously broken, the would-be Goldstone modes acquire a small mass, or
inverse correlation length, and are referred to as pseudo-Goldstones. At
nonzero temperature, the effects of dissipation can be captured by
hydrodynamics at sufficiently long... | 2111.13459v2 |
2021-11-26 | Transition from order to chaos in reduced quantum dynamics | We study a damped kicked top dynamics of a large number of qubits ($N
\rightarrow \infty$) and focus on an evolution of a reduced single-qubit
subsystem. Each subsystem is subjected to the amplitude damping channel
controlled by the damping constant $r\in [0,1]$, which plays the role of the
single control parameter. In... | 2111.13477v1 |
2021-12-06 | Damped physical oscillators, temperature and chemical clocks | The metaphor of a clock in physics describes near-equilibrium reversible
phenomena such as an oscillating spring. It is surprising that for chemical and
biological clocks the focus has been exclusively on the far-from-equilibrium
dissipative processes. We show here that one can represent chemical
oscillations (the Lotk... | 2112.03083v1 |
2021-12-10 | Existence of Zero-damped Quasinormal Frequencies for Nearly Extremal Black Holes | It has been observed that many spacetimes which feature a near-extremal
horizon exhibit the phenomenon of zero-damped modes. This is characterised by
the existence of a sequence of quasinormal frequencies which all converge to
some purely imaginary number $i\alpha$ in the extremal limit and cluster in a
neighbourhood o... | 2112.05669v3 |
2021-12-22 | Quantifying Spin-Orbit Torques in Antiferromagnet/Heavy Metal Heterostructures | The effect of spin currents on the magnetic order of insulating
antiferromagnets (AFMs) is of fundamental interest and can enable new
applications. Toward this goal, characterizing the spin-orbit torques (SOT)
associated with AFM/heavy metal (HM) interfaces is important. Here we report
the full angular dependence of th... | 2112.12238v1 |
2022-01-04 | Focusing of nonlinear eccentric waves in astrophysical discs. II. Excitation and damping of tightly-wound waves | In this paper I develop a nonlinear theory of tightly-wound (highly twisted)
eccentric waves in astrophysical discs, based on the averaged Lagrangian method
of Whitham. Viscous dissipation is included in the theory by use of a
pseudo-Lagrangian. This work is an extension of the theory developed by Lee \&
Goodman to 3D ... | 2201.01156v1 |
2022-01-12 | Local Well-Posedness of the Gravity-Capillary Water Waves System in the Presence of Geometry and Damping | We consider the gravity-capillary water waves problem in a domain $\Omega_t
\subset \mathbb{T} \times \mathbb{R}$ with substantial geometric features.
Namely, we consider a variable bottom, smooth obstacles in the flow and a
constant background current. We utilize a vortex sheet model introduced by
Ambrose, et. al. in ... | 2201.04713v2 |
2022-02-04 | Finite-temperature plasmons, damping and collective behavior for $α-\mathcal{T}_3$ model | We have conducted a thorough theoretical and numerical investigation of the
electronic susceptibility, polarizability, plasmons, their damping rates, as
well as the static screening in pseudospin-1 Dirac cone materials with a flat
band, or for a general $\alpha - \mathcal{T}_3$ model, at finite temperatures.
This inclu... | 2202.01945v1 |
2022-02-04 | Enhancing the Formation of Wigner Negativity in a Kerr Oscillator via Quadrature Squeezing | Motivated by quantum experiments with nanomechanical systems, the evolution
of a Kerr oscillator with focus on creation of states with a negative Wigner
function is investigated. Using the phase space formalism, results are
presented that demonstrate an asymptotic behavior in the large squeezing regime
for the negativi... | 2202.02285v1 |
2022-02-11 | Spin stiffness, spectral weight, and Landau damping of magnons in metallic spiral magnets | We analyze the properties of magnons in metallic electron systems with spiral
magnetic order. Our analysis is based on the random phase approximation for the
susceptibilities of tight binding electrons with a local Hubbard interaction in
two or three dimensions. We identify three magnon branches from poles in the
susce... | 2202.05660v1 |
2022-02-16 | On the strong convergence of the trajectories of a Tikhonov regularized second order dynamical system with asymptotically vanishing damping | This paper deals with a second order dynamical system with vanishing damping
that contains a Tikhonov regularization term, in connection to the minimization
problem of a convex Fr\'echet differentiable function $g$.
We show that for appropriate Tikhonov regularization parameters the value of
the objective function in... | 2202.08980v1 |
2022-04-01 | Effect of interfacial spin mixing conductance on gyromagnetic ratio of Gd substituted Y$_{3}$Fe$_{5}$O$_{12}$ | Due to its low intrinsic damping, Y$_3$Fe$_5$O$_{12}$ and its substituted
variations are often used for ferromagnetic layer at spin pumping experiment.
Spin pumping is an interfacial spin current generation in the interface of
ferromagnet and non-magnetic metal, governed by spin mixing conductance
parameter $G^{\uparro... | 2204.00310v1 |
2022-04-04 | A Vanka-based parameter-robust multigrid relaxation for the Stokes-Darcy Brinkman problems | We propose a block-structured multigrid relaxation scheme for solving the
Stokes-Darcy Brinkman equations discretized by the marker and cell scheme. An
element-based additive Vanka smoother is used to solve the corresponding
shifted Laplacian operator. Using local Fourier analysis, we present the
stencil for the additi... | 2204.01237v1 |
2022-04-19 | Blow-up and lifespan estimate for wave equations with critical damping term of space-dependent type related to Glassey conjecture | The main purpose of the present paper is to study the blow-up problem of the
wave equation with space-dependent damping in the \textit{scale-invariant case}
and time derivative nonlinearity with small initial data. Under appropriate
initial data which are compactly supported, by using a test function method and
taking ... | 2204.09156v1 |
2022-04-28 | Strong coupling of quantum emitters and the exciton polariton in MoS$_2$ nanodisks | As a quasiparticle formed by light and excitons in semiconductors, the
exciton-polariton (EP) as a quantum bus is promising for the development of
quantum interconnect devices at room temperature. However, the significant
damping of EPs in the material generally causes a loss of quantum information.
We propose a mechan... | 2204.13383v2 |
2022-05-09 | Scalable all-optical cold damping of levitated nanoparticles | The field of levitodynamics has made significant progress towards controlling
and studying the motion of a levitated nanoparticle. Motional control relies on
either autonomous feedback via a cavity or measurement-based feedback via
external forces. Recent demonstrations of measurement-based ground-state
cooling of a si... | 2205.04455v1 |
2022-06-08 | Thermal ion kinetic effects and Landau damping in fishbone modes | The kinetic-MHD hybrid simulation approach for macroscopic instabilities in
plasmas can be extended to include the kinetic effects of both thermal ions and
energetic ions. The new coupling scheme includes synchronization of density and
parallel velocity between thermal ions and MHD, in addition to pressure
coupling, to... | 2206.03648v1 |
2022-07-12 | Resonant Multilevel Amplitude Damping Channels | We introduce a new set of quantum channels: resonant multilevel amplitude
damping (ReMAD) channels. Among other instances, they can describe energy
dissipation effects in multilevel atomic systems induced by the interaction
with a zero-temperature bosonic environment. At variance with the already known
class of multile... | 2207.05646v2 |
2022-07-14 | Estimates for the nonlinear viscoelastic damped wave equation on compact Lie groups | Let $G$ be a compact Lie group. In this article, we investigate the Cauchy
problem for a nonlinear wave equation with the viscoelastic damping on $G$.
More preciously, we investigate some $L^2$-estimates for the solution to the
homogeneous nonlinear viscoelastic damped wave equation on $G$ utilizing the
group Fourier t... | 2207.06645v3 |
2022-08-04 | Normal and Quasinormal Modes of Holographic Multiquark Star | The quadrupole normal-mode oscillation frequency $f_{n}$ of multiquark star
are computed for $n=1-5$. At the transition from low to high density multiquark
in the core region, the first 2 modes jump to larger values, a distinctive
signature of the presence of the high-density core. When the star oscillation
couples wit... | 2208.02761v2 |
2022-08-10 | Erasure qubits: Overcoming the $T_1$ limit in superconducting circuits | The amplitude damping time, $T_1$, has long stood as the major factor
limiting quantum fidelity in superconducting circuits, prompting concerted
efforts in the material science and design of qubits aimed at increasing $T_1$.
In contrast, the dephasing time, $T_{\phi}$, can usually be extended above
$T_1$ (via, e.g., dy... | 2208.05461v1 |
2022-08-12 | Critical exponent for nonlinear wave equations with damping and potential terms | The aim of this paper is to determine the critical exponent for the nonlinear
wave equations with damping and potential terms of the scale invariant order,
by assuming that these terms satisfy a special relation. We underline that our
critical exponent is different from the one for related equations such as the
nonline... | 2208.06106v3 |
2022-08-17 | Conservation laws and variational structure of damped nonlinear wave equations | All low-order conservation laws are found for a general class of nonlinear
wave equations in one dimension with linear damping which is allowed to be
time-dependent. Such equations arise in numerous physical applications and have
attracted much attention in analysis. The conservation laws describe
generalized momentum ... | 2208.08026v2 |
2022-08-27 | Impact of the free-streaming neutrinos to the second order induced gravitational waves | The damping effect of the free-streaming neutrinos on the second order
gravitational waves is investigated in detail. We solve the Boltzmann equation
and give the anisotropic stress induced by neutrinos to second order. The first
order tensor and its coupling with scalar perturbations induced gravitational
waves are co... | 2208.12948v1 |
2022-08-28 | The small mass limit for long time statistics of a stochastic nonlinear damped wave equation | We study the long time statistics of a class of semi--linear damped wave
equations with polynomial nonlinearities and perturbed by additive Gaussian
noise in dimensions 2 and 3. We find that if sufficiently many directions in
the phase space are stochastically forced, the system is exponentially
attractive toward its u... | 2208.13287v2 |
2022-08-30 | Results on high energy galactic cosmic rays from the DAMPE space mission | DAMPE (Dark Matter Particle Explorer) is a satellite-born experiment launched
in 2015 in a sun-synchronous orbit at 500 km altitude, and it has been taking
data in stable conditions ever since. Its main goals include the spectral
measurements up to very high energies, cosmic electrons/positrons and gamma
rays up to ten... | 2208.14300v2 |
2022-09-05 | Generation and routing of nanoscale droplet solitons without compensation of magnetic damping | Magnetic droplet soliton is a localized dynamic spin state which can serve as
a nanoscale information carrier and nonlinear oscillator. The present opinion
is that the formation of droplet solitons requires the compensation of magnetic
damping by a torque created by a spin-polarized electric current or pure spin
curren... | 2209.01893v1 |
2022-09-06 | Emergence of damped-localized excitations of the Mott state due to disorder | A key aspect of ultracold bosonic quantum gases in deep optical lattice
potential wells is the realization of the strongly interacting Mott insulating
phase. Many characteristics of this phase are well understood, however little
is known about the effects of a random external potential on its gapped
quasiparticle and q... | 2209.02435v2 |
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