publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2016-12-07 | Ab initio quantum-statistical approach to kinetic theory of low-temperature dilute gases of hydrogen-like atoms | We develop a microscopic approach to the consistent construction of the
kinetic theory of dilute weakly ionized gases of hydrogen-like atoms. The
approach is based on the framework of the second quantization method in the
presence of bound states of particles and the method of reduced description of
relaxation processe... | 1612.02245v1 |
2018-07-27 | Phase spreading and temporal coherence of a pair-condensed Fermi gas at low temperature | A condensate of pairs in an isolated, homogeneous, unpolarised, finite-size
spin 1/2 Fermi gas at low nonzero temperature T, undergoes with time a phase
change with a random component, due to coupling to the gas thermal phonons.
With the quantum second Josephson relation relating the derivative of the
condensate phase ... | 1807.10476v2 |
2019-08-14 | Comparison of wave-structure interaction dynamics of a submerged cylindrical point absorber with three degrees of freedom using potential flow and computational fluid dynamics models | In this paper we compare the heave, surge, and pitch dynamics of a submerged
cylindrical point absorber, simulated using potential flow and fully-resolved
computational fluid dynamics (CFD) models. The potential flow model is based on
the time-domain Cummins equation, whereas the CFD model uses the fictitious
domain Br... | 1908.04981v4 |
2019-09-13 | Multi-Particle Collisions in Microgravity: Coefficient of Restitution and Sticking Threshold for Systems of Mm-Sized Particles | The current model of planet formation lacks a good understanding of the
growth of dust particles inside the protoplanetary disk beyond mm sizes. In
order to investigate the low-velocity collisions between this type of
particles, the NanoRocks experiment was flown on the International Space
Station (ISS) between Septemb... | 1909.06417v1 |
2020-03-20 | A comparison of wave observations in the Arctic marginal ice zone with spectral models | Increased economic activity and research interest in the Arctic raise the
need for better wave forecasts in the marginal ice zone (MIZ). Mathematical and
numerical models of wave propagation in sea ice would benefit from more in situ
data for validation. This study presents shipborne wave measurements from the
MIZ wher... | 2003.09472v3 |
2020-09-24 | Kinetic energy dissipation and fluctuations in strongly-damped heavy-ion collisions within the stochastic mean-field approach | Background: Microscopic mean-field approaches have been successful in
describing the most probable reaction outcomes in low-energy heavy-ion
reactions. However, those approaches are known to severely underestimate
dispersions of observables around the average values that has limited their
applicability. Recently it has... | 2009.11978v2 |
2021-01-21 | A Gauss-Seidel projection method with the minimal number of updates for stray field in micromagnetic simulations | Magnetization dynamics in magnetic materials is often modeled by the
Landau-Lifshitz equation, which is solved numerically in general. In
micromagnetic simulations, the computational cost relies heavily on the
time-marching scheme and the evaluation of stray field. Explicit marching
schemes are efficient but suffer fro... | 2101.08574v1 |
2022-07-06 | Anisotropic Behavior of the Thermoelectric Power and the Thermal Conductivity in a Unidirectional Lateral Superlattice: A Typical Anisotropic System Exhibiting Two Distinct Nernst Coefficients | We have calculated the thermoelectric conductivity tensor $\varepsilon_{ij}$
and the thermal conductivity tensor $\lambda_{ij}$ of a unidirectional lateral
superlattice (ULSL) ($i,j = x,y$, with the $x$-axis aligned to the principal
axis of the ULSL), %, given as the first- and the second-order moments,
employing based... | 2207.02367v3 |
2022-07-13 | Probing Bardeen-Kiselev black hole with cosmological constant caused by Einstein equations coupled with nonlinear electrodynamics using quasinormal modes and greybody bounds | In this work, we investigate a static and spherically symmetric
Bardeen-Kiselev black hole with cosmological constant which is a solution of
the Einstein-non-linear Maxwell field equations along with a quintessential
field. We compute the quasinormal frequencies for Bardeen-Kiselev black
hole(BH) with cosmological cons... | 2207.05907v4 |
2022-07-29 | Global spherically symmetric solutions to degenerate compressible Navier-Stokes equations with large data and far field vacuum | We consider the initial-boundary value problem (IBVP) for the isentropic
compressible Navier-Stokes equations (\textbf{CNS}) in the domain exterior to a
ball in $\mathbb R^d$ $(d=2\ \text{or} \ 3)$. When viscosity coefficients are
given as a constant multiple of the mass density $\rho$, based on some analysis
of the no... | 2207.14494v1 |
2022-11-23 | Lattice eddy simulation of turbulent flows | Kolmogorov's (1941) theory of self-similarity implies the universality of
small-scale eddies, and holds promise for a universal sub-grid scale model for
large eddy simulation. The fact is the empirical coefficient of a typical
sub-grid scale model varies from 0.1 to 0.2 in free turbulence and damps
gradually to zero ap... | 2211.12810v1 |
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 |
2016-10-10 | 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 |
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 |
2017-12-04 | 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 |
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 |
2020-12-27 | 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 |
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 |
2016-07-06 | Damping of Alfven waves by Turbulence and its Consequences: from Cosmic-Rays Streaming to Launching Winds | This paper considers turbulent damping of Alfven waves in magnetized plasmas.
We identify two cases of damping, one related to damping of cosmic rays
streaming instability, the other related to damping of Alfven waves emitted by
a macroscopic wave source, e.g. stellar atmosphere. The physical difference
between the two... | 1607.02042v1 |
2018-01-18 | Quantum Landau damping in dipolar Bose-Einstein condensates | We consider Landau damping of elementary excitations in Bose-Einstein
condensates (BECs) with dipolar interactions. We discuss quantum and
quasi-classical regimes of Landau damping. We use a generalized wave-kinetic
description of BECs which, apart from the long range dipolar interactions, also
takes into account the q... | 1801.06256v1 |
2020-05-31 | Optimal decay rates of the compressible Euler equations with time-dependent damping in $\mathbb R^n$: (I) under-damping case | This paper is concerned with the multi-dimensional compressible Euler
equations with time-dependent damping of the form
$-\frac{\mu}{(1+t)^\lambda}\rho\boldsymbol u$ in $\mathbb R^n$, where $n\ge2$,
$\mu>0$, and $\lambda\in[0,1)$. When $\lambda>0$ is bigger, the damping effect
time-asymptotically gets weaker, which is ... | 2006.00401v1 |
2022-08-17 | Anti-parity-time symmetry hidden in a damping linear resonator | Phase transition from the over-damping to under-damping states is a
ubiquitous phenomenon in physical systems. However, what kind of symmetry is
broken associated with this phase transition remains unclear. Here, we discover
that this phase transition is determined by an anti-parity-time
(anti-$\mathcal{PT}$) symmetry ... | 2208.08187v2 |
1996-12-10 | Collisional matter-phase damping in Bose-condensed gas | Collisional damping of the excitations in a Bose-condensed gas is
investigated over the wide range of energies and temperatures. Numerical
results for the damping rate are presented and a number of asymptotic and
interpolating expressions for it are derived. | 9612086v1 |
2001-11-29 | Tensor form of magnetization damping | A tensor form of phenomenological damping is derived for small magnetization
motions. This form reflects basic physical relaxation processes for a general
uniformly magnetized particle or film. Scalar Landau-Lifshitz damping is found
to occur only for two special cases of system symmetry. | 0111566v1 |
1999-07-28 | An effective relaxation-time approach to collisionless quark-gluon plasma | We present an effective relaxation-time theory to study the collisionless
quark-gluon plasma. Applying this method we calculate the damping rate to be of
order $g^2T$ and find plasmon scattering is the damping mechanism. The damping
for the transverse mode is stronger than the longitudinal one. | 9907526v1 |
1999-11-16 | Dynamical resummation and damping in the O(N) model | A general real-time formalism is developed to resum the self-energy operator
of broken symmetry scalar field theories in form of self-consistent gap
equations for the spectral function. The solution of the equations is
approximated with finite lifetime quasi-particles. In the Landau damping rates
viscosity terms, analo... | 9911374v1 |
1993-03-24 | On the Quantizations of the Damped Systems | Based on a simple observation that a classical second order differential
equation may be decomposed into a set of two first order equations, we
introduce a Hamiltonian framework to quantize the damped systems. In
particular, we analyze the system of a linear damped harmonic oscillator and
demonstrate that the time evol... | 9303137v1 |
2006-01-09 | Energy decay for damped wave equations on partially rectangular domains | We consider the wave equation with a damping term on a partially rectangular
planar domain, assuming that the damping is concentrated close to the
non-rectangular part of the domain. Polynomial decay estimates for the energy
of the solution are established. | 0601195v1 |
2002-06-07 | Resonant states and classical damping | Using Koopman's approach to classical dynamical systems we show that the
classical damping may be interpreted as appearance of resonant states of the
corresponding Koopman's operator. It turns out that simple classical damped
systems give rise to discrete complex spectra. Therefore, the corresponding
generalized eigenv... | 0206009v1 |
2002-12-19 | Trapped particle bounds on stimulated scatter in the large k/kD regime | In the strongly damped regime, the convective gain rate for stimulated
scatter varies inversely with the plasma wave damping rate. Electron trapping
effects reduce the damping but also lead to loss of resonance for large enough
amplitude waves. This leads to a gain rate bound and corresponding optimum
scattered light f... | 0212071v1 |
2003-02-03 | Oscillator damping with more than one mechanism of internal friction dissipation | The author's modified Coulomb damping model has been generalized to
accommodate internal friction that derives from several dissipation mechanisms
acting simultaneously. Because of its fundamental nonlinear nature, internal
friction damping causes the quality factor Q of an oscillator in free-decay to
change in time. E... | 0302003v1 |
2003-02-15 | Anisotropic Internal Friction Damping | The mechanical damping properties of sheet polaroid material have been
studied with a physical pendulum. The polaroid samples were placed under the
knife-edges of the pendulum, which was operated in free-decay at a period in
the vicinity of 10 s. With the edges oriented parallel to the direction of the
long molecular c... | 0302055v1 |
2006-08-07 | Study of the Damped Pendulum | Experiments on the oscillatory motion of a suspended bar magnet throws light
on the damping effects acting on the pendulum. The viscous drag offered by air
was found the be the main contributor for slowing the pendulum down. The nature
and magnitude of the damping effects were shown to be strongly dependent on the
ampl... | 0608071v1 |
1995-02-27 | Quantum Oscillator with Kronig-Penney Excitation in Different Regimes of Damping | There are discussed the exact solution of the time--dependent Schr\"{o}dinger
equation for a damped quantum oscillator subject to a periodical frequency
delta--kicks describing squeezed states which are expressed in terms of
Chebyshev polynomials. The cases of strong and weak damping are investigated in
the frame of Ca... | 9502023v1 |
2007-03-12 | Quantum estimation of a damping constant | We discuss an interferometric approach to the estimation of quantum
mechanical damping. We study specific classes of entangled and separable probe
states consisting of superpositions of coherent states. Based on the assumption
of limited quantum resources we show that entanglement improves the estimation
of an unknown ... | 0703091v2 |
2008-11-07 | Asymptotic stability of the wave equation on compact surfaces and locally distributed damping - A sharp result | This paper is concerned with the study of the wave equation on compact
surfaces and locally distributed damping. We study the case where the damping
is effective in a well-chosen subset of arbitrarily small measure. | 0811.1190v1 |
2008-11-07 | Uniform Stabilization of the wave equation on compact surfaces and locally distributed damping | This paper is concerned with the study of the wave equation on compact
surfaces and locally distributed damping. We study the case where the damping
is effective on the complement of visible umbilical sets. | 0811.1204v1 |
2010-11-20 | Enhanced damping of ion acoustic waves in dense plasmas | A theory for the ion acoustic wave damping in dense plasmas and warm dense
matter, accounting for the Umklapp process, is presented. A higher decay rate
compared to the prediction from the Landau damping theory is predicted for
high-Z dense plasmas where the electron density ranges from $10^{21}$ to $
10^{24} \mathrm{c... | 1011.4607v1 |
2012-05-16 | Enhanced coupling design of a detuned damped structure for clic | The key feature of the improved coupling design in the Damped Detuned
Structure (DDS) is focused on the four manifolds. Rectangular geometry slots
and rectangular manifolds are used. This results in a significantly stronger
coupling to the manifolds compared to the previous design. We describe the new
design together w... | 1205.3590v1 |
2012-06-26 | On the $L^{2}$-critical nonlinear Schrödinger Equation with a nonlinear damping | We consider the Cauchy problem for the $L^{2}$-critical nonlinear
Schr\"{o}dinger equation with a nonlinear damping. According to the power of
the damping term, we prove the global existence or the existence of finite time
blowup dynamics with the log-log blow-up speed for $\|\nabla u(t)\|_{L^2}$. | 1206.6082v4 |
2012-10-12 | Semi-linear wave equations with effective damping | We study the Cauchy problem for the semi-linear damped wave equation in any
space dimension. We assume that the time-dependent damping term is effective.
We prove the global existence of small energy data solutions in the
supercritical case. | 1210.3493v1 |
2012-12-10 | Strongly damped wave equation with exponential nonlinearities | In this paper, we study the initial boundary value problem for the two
dimensional strong damped wave equation with exponentially growing source and
damping terms. We first show the well-posedness of this problem and then prove
the existence of the global attractor in $(H_{0}^{1}(\Omega)\cap
L^{\infty}(\Omega))\times L... | 1212.2180v2 |
2013-10-27 | Exponential decay of solutions for the plate equation with localized damping | In this paper, we give positive answer to the open question raised in [E.
Zuazua, Exponential decay for the semilinear wave equation with localized
damping in unbounded domains. J. Math. Pures Appl., 70 (1991) 513--529] on the
exponential decay of solutions for the semilinear plate equation with localized
damping. | 1310.7243v3 |
2014-03-07 | Landau damping in Sobolev spaces for the Vlasov-HMF model | We consider the Vlasov-HMF (Hamiltonian Mean-Field) model. We consider
solutions starting in a small Sobolev neighborhood of a spatially homogeneous
state satisfying a linearized stability criterion (Penrose criterion). We prove
that these solutions exhibit a scattering behavior to a modified state, which
implies a non... | 1403.1668v2 |
2015-03-30 | Damping to prevent the blow-up of the Korteweg-de Vries equation | We study the behavior of the solution of a generalized damped KdV equation
$u_t + u_x + u_{xxx} + u^p u_x + \mathscr{L}_{\gamma}(u)= 0$. We first state
results on the local well-posedness. Then when $p \geq 4$, conditions on
$\mathscr{L}_{\gamma}$ are given to prevent the blow-up of the solution.
Finally, we numericall... | 1503.08559v1 |
2015-11-25 | A Proposal of a Damping Term for the Relativistic Euler Equations | We introduce a damping term for the special relativistic Euler equations in
$3$-D and show that the equations reduce to the non-relativistic damped Euler
equations in the Newtonian limit. We then write the equations as a symmetric
hyperbolic system for which local-in-time existence of smooth solutions can be
shown. | 1511.08183v1 |
2016-01-27 | Concatenated Codes for Amplitude Damping | We discuss a method to construct quantum codes correcting amplitude damping
errors via code concatenation. The inner codes are chosen as asymmetric
Calderbank-Shor-Steane (CSS) codes. By concatenating with outer codes
correcting symmetric errors, many new codes with good parameters are found,
which are better than the ... | 1601.07423v1 |
2016-03-29 | Generalized damped Milne-Pinney equation and Chiellini method | We adopt the Chiellini integrability method to find the solutions of various
generalizations of the damped Milne-Pinney equations. In particular, we find
the solution of the damped Ermakov-Painlev\'e II equation and generalized
dissipative Milne-Pinney equation. | 1603.08747v2 |
2017-12-07 | Damped wave equations on compact hyperbolic surfaces | We prove exponential decay of energy for solutions of the damped wave
equation on compact hyperbolic surfaces with regular initial data as long as
the damping is nontrivial. The proof is based on a similar strategy as in
Dyatlov-Jin and in particular, uses the fractal uncertainty principle proved in
Bourgain-Dyatlov. | 1712.02692v1 |
2018-09-10 | Logarithmic Decay of a Wave Equation with Kelvin-Voigt Damping | In this paper we analyze the long time behavior of a wave equation with local
Kelvin-Voigt Damping. Through introducing proper class symbol and
pseudo-differential calculus, we obtain a Carleman estimate, and then establish
an estimate on the corresponding resolvent operator. As a result, we show the
logarithmic decay ... | 1809.03196v1 |
2018-11-07 | Slow-dissipation limit of the harmonic oscillator with general power-law damping | An approximate solution is presented for simple harmonic motion in the
presence of damping by a force which is a general power-law function of the
velocity. The approximation is shown to be quite robust, allowing for a simple
way to investigate amplitude decay in the presence of general types of weak,
nonlinear damping... | 1811.02953v2 |
2019-09-25 | Forced Coupled Duffing Oscillators with Nonlinear Damping: Resonance and Antiresonance | In this work, we investigate resonance and antiresonance behaviour in forced
coupled Duffing oscillators with nonlinear damping. Further, we will analyse
the parameter dependence of the frequency response and stability. In the course
of all the analysis, emphasis shall be on how different damping mechanisms
contrast ag... | 1909.11390v1 |
2020-04-21 | Damping rate limitations for transverse dampers in large hadron colliders | The paper focuses on two issues important for design and operation of
bunch-by-bunch transverse damper in a very large hadron collider, where fast
damping is required to suppress beam instabilities and noise induced emittance
growth. The first issue is associated with kick variation along a bunch which
affects the damp... | 2004.10249v2 |
2021-02-01 | Global existence for semilinear wave equations with scaling invariant damping in 3-D | Global existence for small data Cauchy problem of semilinear wave equations
with scaling invariant damping in 3-D is established in this work, assuming
that the data are radial and the constant in front of the damping belongs to
$[1.5, 2)$. The proof is based on a weighted $L^2-L^2$ estimate for
inhomogeneous wave equa... | 2102.00909v1 |
2022-02-10 | Stochastic optimal control for nonlinear damped network dynamics | We present a stochastic optimal control problem for a tree network. The
dynamics of the network are governed by transport equations with a special
emphasis on the non-linear damping function. Demand profiles at the network
sinks are modelled by a stochastic differential equations. An explicit optimal
inflow into the ne... | 2202.05114v1 |
2022-03-03 | Conformal symmetry in damped Pais-Uhlenbeck oscillator | Two Lagrangian formulations for describing of the damped harmonic oscillator
have been introduced by Bateman. For these models we construct higher
derivative generalization which enjoys the l-conformal Newton-Hooke symmetry.
The dynamics of generalized systems corresponds to the damped Pais-Uhlenbeck
oscillator for a p... | 2203.01651v1 |
2022-10-31 | An adaptive damped Newton method for strongly monotone and Lipschitz continuous operator equations | We will consider the damped Newton method for strongly monotone and Lipschitz
continuous operator equations in a variational setting. We will provide a very
accessible justification why the undamped Newton method performs better than
its damped counterparts in a vicinity of a solution. Moreover, in the given
setting, a... | 2210.17107v1 |
2022-11-19 | Blow up and lifespan estimates for systems of semi-linear wave equations with damping and potential | In this paper, we consider the semi-linear wave systems with
power-nonlinearities and a large class of space-dependent damping and
potential. We obtain the same blow-up regions and the lifespan estimates for
three types wave systems, compared with the systems without damping and
potential. | 2211.10639v1 |
2023-08-10 | Pathwise uniqueness for stochastic heat and damped equations with Hölder continuous drift | In this paper, we prove pathwise uniqueness for stochastic differential
equations in infinite dimension. Under our assumptions, we are able to consider
the stochastic heat equation up to dimension $3$, the stochastic damped wave
equation in dimension $1$ and the stochastic Euler-Bernoulli damped beam
equation up to dim... | 2308.05415v1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.