publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2007-08-28 | Ising Dynamics with Damping | We show for the Ising model that is possible construct a discrete time
stochastic model analogous to the Langevin equation that incorporates an
arbitrary amount of damping. It is shown to give the correct equilibrium
statistics and is then used to investigate nonequilibrium phenomena, in
particular, magnetic avalanches... | 0708.3855v1 |
2008-02-08 | On the scaling of the damping time for resonantly damped oscillations in coronal loops | There is not as yet full agreement on the mechanism that causes the rapid
damping of the oscillations observed by TRACE in coronal loops. It has been
suggested that the variation of the observed values of the damping time as
function of the corresponding observed values of the period contains
information on the possibl... | 0802.1143v1 |
2008-10-02 | Critically damped quantum search | Although measurement and unitary processes can accomplish any quantum
evolution in principle, thinking in terms of dissipation and damping can be
powerful. We propose a modification of Grover's algorithm in which the idea of
damping plays a natural role. Remarkably, we have found that there is a
critical damping value ... | 0810.0470v1 |
2009-07-01 | Modal approximations to damped linear systems | We consider a finite dimensional damped second order system and obtain
spectral inclusion theorems for the related quadratic eigenvalue problem. The
inclusion sets are the 'quasi Cassini ovals' which may greatly outperform
standard Gershgorin circles. As the unperturbed system we take a modally damped
part of the syste... | 0907.0167v1 |
2010-01-14 | Multi-Error-Correcting Amplitude Damping Codes | We construct new families of multi-error-correcting quantum codes for the
amplitude damping channel. Our key observation is that, with proper encoding,
two uses of the amplitude damping channel simulate a quantum erasure channel.
This allows us to use concatenated codes with quantum erasure-correcting codes
as outer co... | 1001.2356v1 |
2011-09-05 | Spectral theory of damped quantum chaotic systems | We investigate the spectral distribution of the damped wave equation on a
compact Riemannian manifold, especially in the case of a metric of negative
curvature, for which the geodesic flow is Anosov. The main application is to
obtain conditions (in terms of the geodesic flow on $X$ and the damping
function) for which t... | 1109.0930v1 |
2012-06-07 | From resolvent estimates to damped waves | In this paper we show how to obtain decay estimates for the damped wave
equation on a compact manifold without geometric control via knowledge of the
dynamics near the un-damped set. We show that if replacing the damping term
with a higher-order \emph{complex absorbing potential} gives an operator
enjoying polynomial r... | 1206.1565v1 |
2012-12-03 | Inviscid limit of stochastic damped 2D Navier-Stokes equations | We consider the inviscid limit of the stochastic damped 2D Navier- Stokes
equations. We prove that, when the viscosity vanishes, the stationary solution
of the stochastic damped Navier-Stokes equations converges to a stationary
solution of the stochastic damped Euler equation and that the rate of
dissipation of enstrop... | 1212.0509v3 |
2014-01-13 | NLSE for quantum plasmas with the radiation damping | We consider contribution of the radiation damping in the quantum hydrodynamic
equations for spinless particles. We discuss possibility of obtaining of
corresponding non-linear Schrodinger equation (NLSE) for the macroscopic wave
function. We compare contribution of the radiation damping with weakly (or
semi-) relativis... | 1401.2829v1 |
2014-09-26 | An ultimate storage ring lattice with vertical emittance generated by damping wigglers | We discuss the approach of generating round beams for ultimate storage rings
using vertical damping wigglers (with horizontal magnetic field). The vertical
damping wigglers provide damping and excite vertical emittance. This eliminates
the need to generate large linear coupling that is impractical with traditional
off-... | 1409.7452v2 |
2016-08-14 | Mechanical energy and mean equivalent viscous damping for SDOF fractional oscillators | This paper addresses the total mechanical energy of a single degree of
freedom fractional oscillator. Based on the energy storage and dissipation
properties of the Caputo fractional derivatives, the expression for total
mechanical energy in the single degree of freedom fractional oscillator is
firstly presented. The en... | 1608.04071v1 |
2017-03-01 | Behaviors of the energy of solutions of two coupled wave equations with nonlinear damping on a compact manifold with boundary | In this paper we study the behaviors of the the energy of solutions of
coupled wave equations on a compact manifold with boundary in the case of
indirect nonlinear damping . Only one of the two equations is directly damped
by a localized nonlinear damping term. Under geometric conditions on both the
coupling and the da... | 1703.00172v1 |
2017-06-02 | Vanishing viscosity limit for global attractors for the damped Navier--Stokes system with stress free boundary conditions | We consider the damped and driven Navier--Stokes system with stress free
boundary conditions and the damped Euler system in a bounded domain
$\Omega\subset\mathbf{R}^2$. We show that the damped Euler system has a
(strong) global attractor in~$H^1(\Omega)$. We also show that in the vanishing
viscosity limit the global a... | 1706.00607v1 |
2018-01-20 | Long time dynamics for weakly damped nonlinear Klein-Gordon equations | We continue our study of damped nonlinear Klein-Gordon equations. In our
previous work we considered fixed positive damping and proved a form of the
soliton resolution conjecture for radial solutions. In contrast, here we
consider damping which decreases in time to 0. In the class of radial data we
again establish soli... | 1801.06735v1 |
2018-02-28 | Nonexistence of global solutions of wave equations with weak time-dependent damping and combined nonlinearity | In our previous two works, we studied the blow-up and lifespan estimates for
damped wave equations with a power nonlinearity of the solution or its
derivative, with scattering damping independently. In this work, we are devoted
to establishing a similar result for a combined nonlinearity. Comparing to the
result of wav... | 1802.10273v1 |
2018-11-12 | Choking non-local magnetic damping in exchange biased ferromagnets | We investigated the temperature dependence of the magnetic damping in the
exchange biased Pt/ Fe50Mn50 /Fe20Ni80 /SiOx multilayers. In samples having a
strong exchange bias, we observed a drastic decrease of the magnetic damping of
the FeNi with increasing temperature up to the blocking temperature. The
results essenti... | 1811.04821v1 |
2019-05-23 | Escaping Locally Optimal Decentralized Control Polices via Damping | We study the evolution of locally optimal decentralized controllers with the
damping of the control system. Empirically it is shown that even for instances
with an exponential number of connected components, damping merges all local
solutions to the one global solution. We characterize the evolution of locally
optimal ... | 1905.09915v1 |
2019-08-22 | Some remarks on the asymptotic profile of solutions to structurally damped $σ$-evolution equations | In this paper, we are interested in analyzing the asymptotic profiles of
solutions to the Cauchy problem for linear structurally damped
$\sigma$-evolution equations in $L^2$-sense. Depending on the parameters
$\sigma$ and $\delta$ we would like to not only indicate approximation formula
of solutions but also recognize ... | 1908.08492v1 |
2019-09-18 | Global smooth solutions of the damped Boussinesq equations with a class of large initial data | The global regularity problem concerning the inviscid Boussinesq equations
remains an open problem. In an attempt to understand this problem, we examine
the damped Boussinesq equations and study how damping affects the regularity of
solutions. In this paper, we consider the global existence to the damped
Boussinesq equ... | 1909.08360v1 |
2020-02-15 | Asymptotic profile and optimal decay of solutions of some wave equations with logarithmic damping | We introduce a new model of the nonlocal wave equations with a logarithmic
damping mechanism. We consider the Cauchy poroblem for the new model in the
whole space. We study the asymptotic profile and optimal decay and blowup rates
of solutions as time goes to infinity. The damping terms considered in this
paper is not ... | 2002.06319v1 |
2020-05-13 | Weak Input to state estimates for 2D damped wave equations with localized and non-linear damping | In this paper, we study input-to-state (ISS) issues for damped wave equations
with Dirichlet boundary conditions on a bounded domain of dimension two. The
damping term is assumed to be non-linear and localized to an open subset of the
domain. In a first step, we handle the undisturbed case as an extension of a
previous... | 2005.06206v3 |
2020-07-25 | Decay for the Kelvin-Voigt damped wave equation: Piecewise smooth damping | We study the energy decay rate of the Kelvin-Voigt damped wave equation with
piecewise smooth damping on the multi-dimensional domain. Under suitable
geometric assumptions on the support of the damping, we obtain the optimal
polynomial decay rate which turns out to be different from the one-dimensional
case studied in ... | 2007.12994v2 |
2020-08-12 | From Lieb-Thirring inequalities to spectral enclosures for the damped wave equation | Using a correspondence between the spectrum of the damped wave equation and
non-self-adjoint Schroedinger operators, we derive various bounds on complex
eigenvalues of the former. In particular, we establish a sharp result that the
one-dimensional damped wave operator is similar to the undamped one provided
that the L^... | 2008.05176v1 |
2021-08-02 | Wide-Area Damping Control for Interarea Oscillations in Power Grids Based on PMU Measurements | In this paper, a phasor measurement unit (PMU)-based wide-area damping
control method is proposed to damp the interarea oscillations that threaten the
modern power system stability and security. Utilizing the synchronized PMU
data, the proposed almost model-free approach can achieve an effective damping
for the selecte... | 2108.01193v1 |
2021-09-05 | Regularity of the semigroups associated with some damped coupled elastic systems II: a nondegenerate fractional damping case | In this paper, we examine regularity issues for two damped abstract elastic
systems; the damping and coupling involve fractional powers $\mu, \theta$, with
$0 \leq \mu , \theta \leq 1$, of the principal operators. The matrix defining
the coupling and damping is nondegenerate. This new work is a sequel to the
degenerate... | 2109.02044v1 |
2021-09-28 | A robust and efficient line search for self-consistent field iterations | We propose a novel adaptive damping algorithm for the self-consistent field
(SCF) iterations of Kohn-Sham density-functional theory, using a backtracking
line search to automatically adjust the damping in each SCF step. This line
search is based on a theoretically sound, accurate and inexpensive model for
the energy as... | 2109.14018v3 |
2021-11-17 | Spectral asymptotics for the vectorial damped wave equation | The eigenfrequencies associated to a scalar damped wave equation are known to
belong to a band parallel to the real axis. In [Sj{\"o}00] J. Sj{\"o}strand
showed that up to a set of density 0, the eigenfrequencies are confined in a
thinner band determined by the Birkhoff limits of the damping term. In this
article we sh... | 2111.08982v1 |
2021-12-13 | Rotons and their damping in elongated dipolar Bose-Einstein condensates | We discuss finite temperature damping of rotons in elongated Bose-condensed
dipolar gases, which are in the Thomas-Fermi regime in the tightly confined
directions. The presence of many branches of excitations which can participate
in the damping process, is crucial for the Landau damping and results in
significant incr... | 2112.06835v2 |
2022-03-03 | Stability results of locally coupled wave equations with local Kelvin-Voigt damping: Cases when the supports of damping and coupling coefficients are disjoint | In this paper, we study the direct/indirect stability of locally coupled wave
equations with local Kelvin-Voigt dampings/damping and by assuming that the
supports of the dampings and the coupling coefficients are disjoint. First, we
prove the well-posedness, strong stability, and polynomial stability for some
one dimen... | 2203.01632v1 |
2022-03-12 | Asymptotic expansion of solutions to the wave equation with space-dependent damping | We study the large time behavior of solutions to the wave equation with
space-dependent damping in an exterior domain. We show that if the damping is
effective, then the solution is asymptotically expanded in terms of solutions
of corresponding parabolic equations. The main idea to obtain the asymptotic
expansion is th... | 2203.06360v1 |
2022-10-27 | Sharp polynomial decay for polynomially singular damping on the torus | We study energy decay rates for the damped wave equation with unbounded
damping, without the geometric control condition. Our main decay result is
sharp polynomial energy decay for polynomially controlled singular damping on
the torus. We also prove that for normally $L^p$-damping on compact manifolds,
the Schr\"odinge... | 2210.15697v3 |
2023-09-26 | Qualitative properties of solutions to a nonlinear transmission problem for an elastic Bresse beam | We consider a nonlinear transmission problem for a Bresse beam, which
consists of two parts, damped and undamped. The mechanical damping in the
damped part is present in the shear angle equation only, and the damped part
may be of arbitrary positive length. We prove well-posedness of the
corresponding PDE system in ene... | 2309.15171v2 |
2023-09-27 | Dispersion and damping of ion-acoustic waves in the plasma with a regularized kappa-distribution | The dispersion and damping of ion-acoustic waves in the plasma with a
regularized kappa-distribution are studied. The generalized dispersion relation
and damping rate are derived, which both depend significantly on the parameters
alpha and kappa. The numerical analyses show that the wave frequency and the
damping rate ... | 2309.15885v1 |
2023-11-16 | Near-optimal Closed-loop Method via Lyapunov Damping for Convex Optimization | We introduce an autonomous system with closed-loop damping for first-order
convex optimization. While, to this day, optimal rates of convergence are only
achieved by non-autonomous methods via open-loop damping (e.g., Nesterov's
algorithm), we show that our system is the first one featuring a closed-loop
damping while ... | 2311.10053v1 |
2024-02-05 | Fractional damping induces resonant behavior in the Duffing oscillator | The interaction between the fractional order parameter and the damping
parameter can play a relevant role for introducing different dynamical
behaviors in a physical system. Here, we study the Duffing oscillator with a
fractional damping term. Our findings show that for certain values of the
fractional order parameter,... | 2402.02940v1 |
2024-03-13 | Impact of Decoherence on Average Correlation | This article presents a comprehensive study of the impact of decoherence on
the average correlation for pure quantum states. We explore two primary
mechanisms of decoherence: phase damping and amplitude damping, each having
distinct effects on quantum systems. Phase damping, which describes the loss of
quantum coherenc... | 2403.10551v1 |
1998-02-18 | Damping rates of hot Giant Dipole Resonances | The damping rate of hot giant dipole resonances (GDR) is investigated.
Besides Landau damping we consider collisions and density fluctuations as
contributions to the damping of GDR. Within the nonequilibrium Green's function
method we derive a non-Markovian kinetic equation. The linearization of the
latter one leads to... | 9802052v2 |
2015-12-11 | Ultra-low magnetic damping of a metallic ferromagnet | The phenomenology of magnetic damping is of critical importance for devices
that seek to exploit the electronic spin degree of freedom since damping
strongly affects the energy required and speed at which a device can operate.
However, theory has struggled to quantitatively predict the damping, even in
common ferromagn... | 1512.03610v1 |
2020-05-12 | Effective Viscous Damping Enables Morphological Computation in Legged Locomotion | Muscle models and animal observations suggest that physical damping is
beneficial for stabilization. Still, only a few implementations of mechanical
damping exist in compliant robotic legged locomotion. It remains unclear how
physical damping can be exploited for locomotion tasks, while its advantages as
sensor-free, a... | 2005.05725v2 |
2022-02-10 | Non-stationary Anderson acceleration with optimized damping | Anderson acceleration (AA) has a long history of use and a strong recent
interest due to its potential ability to dramatically improve the linear
convergence of the fixed-point iteration. Most authors are simply using and
analyzing the stationary version of Anderson acceleration (sAA) with a constant
damping factor or ... | 2202.05295v1 |
2023-06-30 | A finite element method to compute the damping rate of oscillating fluids inside microfluidic nozzles | We introduce a finite element method for computing the damping rate of fluid
oscillations in nozzles of drop-on-demand (DoD) microfluidic devices. Accurate
knowledge of the damping rates for the least-damped oscillation modes following
droplet ejection is paramount for assessing jetting stability at higher jetting
freq... | 2307.00094v1 |
2023-07-05 | Optimal damping of vibrating systems: dependence on initial conditions | Common criteria used for measuring performance of vibrating systems have one
thing in common: they do not depend on initial conditions of the system. In
some cases it is assumed that the system has zero initial conditions, or some
kind of averaging is used to get rid of initial conditions. The aim of this
paper is to i... | 2307.02352v2 |
2024-01-18 | Multithermal apparent damping of slow waves due to strands with a Gaussian temperature distribution | Context. Slow waves in solar coronal loops are strongly damped. The current
theory of damping by thermal conduction cannot explain some observational
features.\n Aims. We investigate the propagation of slow waves in a coronal
loop built up from strands of different temperatures. \n Methods. We consider
the loop to have... | 2401.09803v1 |
1996-06-07 | Abundances at High Redshifts: the Chemical Enrichment History of Damped Lyman-alpha Galaxies | Damped Lyman-alpha absorption systems found in the spectra of high redshift
quasars are believed to trace the interstellar gas in high redshift galaxies.
In this paper, we study the elemental abundances of C, N, O, Al, Si, S, Cr, Mn,
Fe, Ni, and Zn in a sample of 14 damped Lyman-alpha systems using high quality
echelle... | 9606044v1 |
1998-07-17 | Chaotic scattering on surfaces and collisional damping of collective modes | The damping of hot giant dipole resonances is investigated. The contribution
of surface scattering is compared with the contribution from interparticle
collisions. A unified response function is presented which includes surface
damping as well as collisional damping. The surface damping enters the response
via the Lyap... | 9807185v4 |
2000-09-08 | Probing High-Redshift Disks with Damped Lyman Alpha Systems | Evidence is presented that the damped Lyman alpha absorption systems are the
high-redshift (z > 3) progenitors of galaxy disks. I discuss kinematic evidence
that the damped Lyman Alpha systems are rotating disks. I also discuss
implications of the lack of metal-poor damped Lyman alpha systems with line
width Delta v > ... | 0009126v1 |
2006-09-10 | Damping of Compressional MHD Waves In Quiescent Prominences and Prominence-Corona Transition Region (PCTR) | The effects of radiative losses due to Newtonian cooling and MHD turbulence
have been considered to examine the spatial damping of linear compressional
waves in quiescent prominences and prominence-corona transition region (PCTR).
The radiative losses give acceptable damping lengths for the slow mode wave for
the radia... | 0609266v1 |
1997-10-14 | Damping of low-energy excitations of a trapped Bose condensate at finite temperatures | We present the theory of damping of low-energy excitations of a trapped Bose
condensate at finite temperatures, where the damping is provided by the
interaction of these excitations with the thermal excitations. We emphasize the
key role of stochastization in the behavior of the thermal excitations for
damping in non-s... | 9710128v3 |
2001-12-09 | Soliton dynamics in damped and forced Boussinesq equations | We investigate the dynamics of a lattice soliton on a monatomic chain in the
presence of damping and external forces. We consider Stokes and hydrodynamical
damping. In the quasi-continuum limit the discrete system leads to a damped and
forced Boussinesq equation. By using a multiple-scale perturbation expansion up
to s... | 0112148v1 |
2006-04-17 | The Highly Damped Quasinormal Modes of $d$-dimensional Reissner-Nordstrom Black Holes in the Small Charge Limit | We analyze in detail the highly damped quasinormal modes of $d$-dimensional
Reissner-Nordstr$\ddot{\rm{o}}$m black holes with small charge, paying
particular attention to the large but finite damping limit in which the
Schwarzschild results should be valid. In the infinite damping limit, we
confirm using different meth... | 0604073v2 |
2005-02-16 | Damping signatures in future neutrino oscillation experiments | We discuss the phenomenology of damping signatures in the neutrino
oscillation probabilities, where either the oscillating terms or the
probabilities can be damped. This approach is a possibility for tests of
non-oscillation effects in future neutrino oscillation experiments, where we
mainly focus on reactor and long-b... | 0502147v2 |
1997-07-23 | Riccati parameter modes from Newtonian free damping motion by supersymmetry | We determine the class of damped modes \tilde{y} which are related to the
common free damping modes y by supersymmetry. They are obtained by employing
the factorization of Newton's differential equation of motion for the free
damped oscillator by means of the general solution of the corresponding Riccati
equation toget... | 9707019v4 |
2000-08-22 | Local and Fundamental Mode Coupler Damping of the Transverse Wakefield in RDDS1 Linacs | In damping the wakefield generated by an electron beam traversing several
thousand X-band linacs in the NLC we utilise a Gaussian frequency distribution
of dipole modes to force the modes to deconstructively interfere, supplemented
with moderate damping achieved by coupling these modes to four attached
manifolds. Most ... | 0008211v1 |
2007-10-25 | Damping of Condensate Oscillation of a Trapped Bose Gas in a One-Dimensional Optical Lattice at Finite Temperatures | We study damping of a dipole oscillation in a Bose-Condensed gas in a
combined cigar-shaped harmonic trap and one-dimensional (1D) optical lattice
potential at finite temperatures. In order to include the effect of thermal
excitations in the radial direction, we derive a quasi-1D model of the
Gross-Pitaeavskii equation... | 0710.4610v1 |
2008-01-03 | Spin orbit precession damping in transition metal ferromagnets | We provide a simple explanation, based on an effective field, for the
precession damping rate due to the spin-orbit interaction. Previous effective
field treatments of spin-orbit damping include only variations of the state
energies with respect to the magnetization direction, an effect referred to as
the breathing Fer... | 0801.0549v1 |
2009-02-03 | Damping of filament thread oscillations: effect of the slow continuum | Transverse oscillations of small amplitude are commonly seen in
high-resolution observations of filament threads, i.e. the fine-structures of
solar filaments/prominences, and are typically damped in a few periods. Kink
wave modes supported by the thread body offer a consistent explanation of these
observed oscillations... | 0902.0572v2 |
2010-11-23 | Magnetohydrodynamic kink waves in two-dimensional non-uniform prominence threads | We analyse the oscillatory properties of resonantly damped transverse kink
oscillations in two-dimensional prominence threads. The fine structures are
modelled as cylindrically symmetric magnetic flux tubes with a dense central
part with prominence plasma properties and an evacuated part, both surrounded
by coronal pla... | 1011.5175v2 |
2011-04-04 | Plasmonic abilities of gold and silver spherical nanoantennas in terms of size dependent multipolar resonance frequencies and plasmon damping rates | Absorbing and emitting optical properties of a spherical plasmonic
nanoantenna are described in terms of the size dependent resonance frequencies
and damping rates of the multipolar surface plasmons (SP). We provide the
plasmon size characteristics for gold and silver spherical particles up to the
large size retardatio... | 1104.0565v1 |
2011-11-16 | Three-player quantum Kolkata restaurant problem under decoherence | Effect of quantum decoherence in a three-player quantum Kolkata restaurant
problem is investigated using tripartite entangled qutrit states. Amplitude
damping, depolarizing, phase damping, trit-phase flip and phase flip channels
are considered to analyze the behaviour of players payoffs. It is seen that
Alice's payoff ... | 1111.3913v2 |
2012-07-27 | The effect of non-uniform damping on flutter in axial flow and energy harvesting strategies | The problem of energy harvesting from flutter instabilities in flexible
slender structures in axial flows is considered. In a recent study, we used a
reduced order theoretical model of such a system to demonstrate the feasibility
for harvesting energy from these structures. Following this preliminary study,
we now cons... | 1207.6484v1 |
2012-11-20 | Damping rates of surface plasmons for particles of size from nano- to micrometers; reduction of the nonradiative decay | Damping rates of multipolar, localized surface plasmons (SP) of gold and
silver nanospheres of radii up to $1000nm$ were found with the tools of
classical electrodynamics. The significant increase in damping rates followed
by noteworthy decrease for larger particles takes place along with substantial
red-shift of plasm... | 1211.4781v1 |
2013-10-23 | Landau damping in a collisionless dipolar Bose gas | We present a theory for the Landau damping of low energy quasi-particles in a
collisionless, quasi-2D dipolar Bose gas and produce expressions for the
damping rate in uniform and non-uniform systems. Using simple energy-momentum
conservation arguments, we show that in the homogeneous system, the nature of
the low energ... | 1310.6386v1 |
2014-01-15 | Damping of Terahertz Plasmons in Graphene Coupled with Surface Plasmons in Heavily-Doped Substrate | Coupling of plasmons in graphene at terahert (THz) frequencies with surface
plasmons in a heavily-doped substrate is studied theoretically. We reveal that
a huge scattering rate may completely damp out the plasmons, so that proper
choices of material and geometrical parameters are essential to suppress the
coupling eff... | 1401.3396v1 |
2014-11-28 | Non-equilibrium thermodynamics of damped Timoshenko and damped Bresse systems | In this paper, we cast damped Timoshenko and damped Bresse systems into a
general framework for non-equilibrium thermodynamics, namely the GENERIC
(General Equation for Non-Equilibrium Reversible-Irreversible Coupling)
framework. The main ingredients of GENERIC consist of five building blocks: a
state space, a Poisson ... | 1412.0038v2 |
2014-12-08 | Bi-$\cal{PT}$ symmetry in nonlinearly damped dynamical systems and tailoring $\cal{PT}$ regions with position dependent loss-gain profiles | We investigate the remarkable role of position dependent damping in
determining the parametric regions of symmetry breaking in nonlinear
$\cal{PT}$-symmetric systems. We illustrate the nature of $\cal{PT}$-symmetry
preservation and breaking with reference to a remarkable integrable scalar
nonlinear system. In the two d... | 1412.2574v3 |
2015-09-04 | Damped transverse oscillations of interacting coronal loops | Damped transverse oscillations of magnetic loops are routinely observed in
the solar corona. This phenomenon is interpreted as standing kink
magnetohydrodynamic waves, which are damped by resonant absorption owing to
plasma inhomogeneity across the magnetic field. The periods and damping times
of these oscillations can... | 1509.01487v1 |
2015-09-14 | Beliaev damping in quasi-2D dipolar condensates | We study the effects of quasiparticle interactions in a quasi-two dimensional
(quasi-2D), zero-temperature Bose-Einstein condensate of dipolar atoms, which
can exhibit a roton-maxon feature in its quasiparticle spectrum. Our focus is
the Beliaev damping process, in which a quasiparticle collides with the
condensate and... | 1509.04217v1 |
2015-12-08 | Thermal energies of classical and quantum damped oscillators coupled to reservoirs | We consider the global thermal state of classical and quantum harmonic
oscillators that interact with a reservoir. Ohmic damping of the oscillator can
be exactly treated with a 1D scalar field reservoir, whereas general non-Ohmic
damping is conveniently treated with a continuum reservoir of harmonic
oscillators. Using ... | 1512.02551v2 |
2016-05-17 | Simultaneous Identification of Damping Coefficient and Initial Value in PDEs from boundary measurement | In this paper, the simultaneous identification of damping or anti-damping
coefficient and initial value for some PDEs is considered. An identification
algorithm is proposed based on the fact that the output of system happens to be
decomposed into a product of an exponential function and a periodic function.
The former ... | 1605.05063v1 |
2016-08-30 | Optimal damping ratios of multi-axial perfectly matched layers for elastic-wave modeling in general anisotropic media | The conventional Perfectly Matched Layer (PML) is unstable for certain kinds
of anisotropic media. This instability is intrinsic and independent of PML
formulation or implementation. The Multi-axial PML (MPML) removes such
instability using a nonzero damping coefficient in the direction parallel with
the interface betw... | 1608.08326v3 |
2016-10-10 | A Five-Freedom Active Damping and Alignment Device Used in the Joule Balance | Damping devices are necessary for suppressing the undesired coil motions in
the watt/joule balance. In this paper, an active electromagnetic damping
device, located outside the main magnet, is introduced in the joule balance
project. The presented damping device can be used in both dynamic and static
measurement modes.... | 1610.02799v1 |
2016-10-01 | The destabilizing effect of external damping: Singular flutter boundary for the Pfluger column with vanishing external dissipation | Elastic structures loaded by nonconservative positional forces are prone to
instabilities induced by dissipation: it is well-known in fact that internal
viscous damping destabilizes the marginally stable Ziegler's pendulum and
Pfluger column (of which the Beck's column is a special case), two structures
loaded by a tan... | 1611.03886v1 |
2017-10-10 | A four-field gyrofluid model with neoclassical effects for the study of the rotation velocity of magnetic islands in tokamaks | A four-field system of equations which includes the neoclassical flow damping
effects and the lowest-order finite-Larmor-radius (FLR) corrections is deduced
from a system of gyrofluid equations. The FLR corrections to the poloidal flow
damping are calculated by solving a simplified version of the gyrokinetic
equation. ... | 1710.03585v1 |
2017-10-13 | Mode-Dependent Damping in Metallic Antiferromagnets Due to Inter-Sublattice Spin Pumping | Damping in magnetization dynamics characterizes the dissipation of magnetic
energy and is essential for improving the performance of spintronics-based
devices. While the damping of ferromagnets has been well studied and can be
artificially controlled in practice, the damping parameters of
antiferromagnetic materials ar... | 1710.04766v1 |
2017-12-04 | Resonance oscillation of a damped driven simple pendulum | The resonance characteristics of a driven damped harmonic oscillator are well
known. Unlike harmonic oscillators which are guided by parabolic potentials, a
simple pendulum oscillates under sinusoidal potentials. The problem of an
undamped pendulum has been investigated to a great extent. However, the
resonance charact... | 1712.01032v1 |
2018-01-17 | On Global Existence and Blow-up for Damped Stochastic Nonlinear Schrödinger Equation | In this paper, we consider the well-posedness of the weakly damped stochastic
nonlinear Schr\"odinger(NLS) equation driven by multiplicative noise. First, we
show the global existence of the unique solution for the damped stochastic NLS
equation in critical case. Meanwhile, the exponential integrability of the
solution... | 1801.05630v1 |
2018-03-29 | Giant resonant nonlinear damping in nanoscale ferromagnets | Magnetic damping is a key metric for emerging technologies based on magnetic
nanoparticles, such as spin torque memory and high-resolution biomagnetic
imaging. Despite its importance, understanding of magnetic dissipation in
nanoscale ferromagnets remains elusive, and the damping is often treated as a
phenomenological ... | 1803.10925v1 |
2018-05-16 | Stabilization rates for the damped wave equation with Hölder-regular damping | We study the decay rate of the energy of solutions to the damped wave
equation in a setup where the geometric control condition is violated. We
consider damping coefficients which are $0$ on a strip and vanish like
polynomials, $x^{\beta}$. We prove that the semigroup cannot be stable at rate
faster than $1/t^{(\beta+2... | 1805.06535v3 |
2019-03-01 | Comprehensive Study of Neutrino-Dark Matter Mixed Damping | Mixed damping is a physical effect that occurs when a heavy species is
coupled to a relativistic fluid which is itself free streaming. As a cross-case
between collisional damping and free-streaming, it is crucial in the context of
neutrino-dark matter interactions. In this work, we establish the parameter
space relevan... | 1903.00540v2 |
2019-08-04 | Efficient spin excitation via ultrafast damping-like torques in antiferromagnets | Damping effects form the core of many emerging concepts for high-speed
spintronic applications. Important characteristics such as device switching
times and magnetic domain-wall velocities depend critically on the damping
rate. While the implications of spin damping for relaxation processes are
intensively studied, dam... | 1908.01359v3 |
2019-10-31 | Gyrokinetic investigation of the damping channels of Alfvén modes in ASDEX Upgrade | The linear destabilization and nonlinear saturation of energetic-particle
driven Alfv\'enic instabilities in tokamaks strongly depend on the damping
channels. In this work, the collisionless damping mechanisms of Alfv\'enic
modes are investigated within a gyrokinetic framework, by means of global
simulations with the p... | 1910.14489v1 |
2020-03-13 | Anharmonic phonon damping enhances the $T_c$ of BCS-type superconductors | A theory of superconductivity is presented where the effect of anharmonicity,
as entailed in the acoustic, or optical, phonon damping, is explicitly
considered in the pairing mechanism. The gap equation is solved including
diffusive Akhiezer damping for longitudinal acoustic phonons or Klemens damping
for optical phono... | 2003.06220v2 |
2020-03-29 | Stability results for an elastic-viscoelastic waves interaction systems with localized Kelvin-Voigt damping and with an internal or boundary time delay | We investigate the stability of a one-dimensional wave equation with non
smooth localized internal viscoelastic damping of Kelvin-Voigt type and with
boundary or localized internal delay feedback. The main novelty in this paper
is that the Kelvin-Voigt and the delay damping are both localized via non
smooth coefficient... | 2003.12967v1 |
2020-09-16 | Fast convex optimization via inertial dynamics combining viscous and Hessian-driven damping with time rescaling | In a Hilbert setting, we develop fast methods for convex unconstrained
optimization. We rely on the asymptotic behavior of an inertial system
combining geometric damping with temporal scaling. The convex function to
minimize enters the dynamic via its gradient. The dynamic includes three
coefficients varying with time,... | 2009.07620v1 |
2020-12-27 | Quantum speed limit time in relativistic frame | We investigate the roles of the relativistic effect on the speed of evolution
of a quantum system coupled with amplitude damping channels. We find that the
relativistic effect speed-up the quantum evolution to a uniform evolution speed
of open quantum systems for the damping parameter $p_{\tau}\lesssim
p_{\tau_{c0}}.$ ... | 2012.13859v2 |
2021-06-23 | Regularization of central forces with damping in two and three-dimensions | Regularization of damped motion under central forces in two and
three-dimensions are investigated and equivalent, undamped systems are
obtained. The dynamics of a particle moving in $\frac{1}{r}$ potential and
subjected to a damping force is shown to be regularized a la Levi-Civita. We
then generalize this regularizati... | 2106.12134v1 |
2021-07-06 | Theory of vibrators with variable-order fractional forces | In this paper, we present a theory of six classes of vibrators with
variable-order fractional forces of inertia, damping, and restoration. The
novelty and contributions of the present theory are reflected in six aspects.
1) Equivalent motion equations of those variable-order fractional vibrators are
proposed. 2) The an... | 2107.02340v2 |
2021-08-15 | Exponential stability of a damped beam-string-beam transmission problem | We consider a beam-string-beam transmission problem, where two structurally
damped or undamped beams are coupled with a frictionally damped string by
transmission conditions. We show that for this type of structure, the
dissipation produced by the frictional part is strong enough to produce
exponential decay of the sol... | 2108.06749v1 |
2021-09-10 | Fourth-order dynamics of the damped harmonic oscillator | It is shown that the classical damped harmonic oscillator belongs to the
family of fourth-order Pais-Uhlenbeck oscillators. It follows that the
solutions to the damped harmonic oscillator equation make the Pais-Uhlenbeck
action stationary. Two systematic approaches are given for deriving the
Pais-Uhlenbeck action from ... | 2109.06034v1 |
2022-01-13 | Damping of Alfvén waves in MHD turbulence and implications for cosmic ray streaming instability and galactic winds | Alfv\'{e}nic component of MHD turbulence damps Alfv\'{e}nic waves. The
consequences of this effect are important for many processes, from cosmic ray
(CR) propagation to launching outflows and winds in galaxies and other
magnetized systems. We discuss the differences in the damping of the streaming
instability by turbul... | 2201.05168v1 |
2022-03-14 | Investigation of nonlinear squeeze-film damping involving rarefied gas effect in micro-electro-mechanical-systems | In this paper, the nonlinear squeeze-film damping (SFD) involving rarefied
gas effect in the micro-electro-mechanical-systems (MEMS) is investigated.
Considering the motion of structures (beam, cantilever, and membrane) in MEMS,
the dynamic response of structure will be influenced largely by the
squeeze-film damping. I... | 2203.06902v1 |
2022-05-21 | Noether symmetries and first integrals of damped harmonic oscillator | Noether theorem establishes an interesting connection between symmetries of
the action integral and conservation laws of a dynamical system. The aim of the
present work is to classify the damped harmonic oscillator problem with respect
to Noether symmetries and to construct corresponding conservation laws for all
over-... | 2205.10525v1 |
2023-01-31 | The emergence of soft-glassy mechanics in simulated foams | Several seemingly different soft materials, including foams, cells, and many
complex fluids, exhibit remarkably similar rheological properties and
microscopic dynamics, termed soft glassy mechanics. Here, we show that such
behavior emerges from a simple model of a damped ripening foam, for
sufficiently weak damping. In... | 2301.13400v1 |
2023-02-13 | Thickness and temperature dependent damping in La$_{0.67}$Sr$_{0.33}$MnO$_{3}$ epitaxial films | The damping of La0.67Sr0.33MnO3 (LSMO) epitaxial films as a function of
thickness at different temperatures was studied. The competition between two
scattering types (\r{ho}-like and {\sigma}-like) with entirely distinct
thickness and temperature dependencies resulted in complicated damping
behavior. The behavior of {\... | 2302.06099v3 |
2023-09-15 | On the formation of singularities for the slightly supercritical NLS equation with nonlinear damping | We consider the focusing, mass-supercritical NLS equation augmented with a
nonlinear damping term. We provide sufficient conditions on the nonlinearity
exponents and damping coefficients for finite-time blow-up. In particular,
singularities are formed for focusing and dissipative nonlinearities of the
same power, provi... | 2309.08281v1 |
1998-05-07 | Discovery of z=0.0912 and z=0.2212 Damped Lyman-alpha Absorption Line Systems Toward the Quasar OI 363: Limits on the Nature of Damped Lyman-alpha Galaxies | The discovery of a z_abs = 0.0912 damped Lyman-alpha absorption-line system
in the HST-FOS ultraviolet spectrum of the quasar OI 363 (0738+313) is
reported. This is the lowest redshift quasar damped Lyman-alpha system known.
Its neutral hydrogen column density is N(HI) = 1.5(+/- 0.2) E21 atoms/cm^2,
which easily exceed... | 9805093v1 |
2008-01-24 | Attenuation of small-amplitude oscillations in a prominence-corona model with a transverse magnetic field | Small-amplitude prominence oscillations are usually damped after a few
periods. We study the attenuation of non-adiabatic magnetoacoustic waves in a
slab prominence embedded in the coronal medium. We assume an equilibrium
configuration with a transverse magnetic field to the slab axis and investigate
wave damping by th... | 0801.3744v2 |
2010-04-26 | Selective spatial damping of propagating kink waves due to resonant absorption | There is observational evidence of propagating kink waves driven by
photospheric motions. These disturbances, interpreted as kink
magnetohydrodynamic (MHD) waves are attenuated as they propagate upwards in the
solar corona. In this paper we show that resonant absorption provides a simple
explanation to the spatial damp... | 1004.4468v1 |
2011-04-10 | Spatial Damping of Propagating Kink Waves Due to Resonant Absorption: Effect of Background Flow | Observations show the ubiquitous presence of propagating magnetohydrodynamic
(MHD) kink waves in the solar atmosphere. Waves and flows are often observed
simultaneously. Due to plasma inhomogeneity in the perpendicular direction to
the magnetic field, kink waves are spatially damped by resonant absorption. The
presence... | 1104.1791v1 |
2013-02-08 | On the Damping-Induced Self-Recovery Phenomenon in Mechanical Systems with Several Unactuated Cyclic Variables | The damping-induced self-recovery phenomenon refers to the fundamental
property of underactuated mechanical systems: if an unactuated cyclic variable
is under a viscous damping-like force and the system starts from rest, then the
cyclic variable will always move back to its initial condition as the actuated
variables c... | 1302.2109v1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.