publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2011-02-24 | Environment-assisted quantum Minority games | The effect of entanglement and correlated noise in a four-player quantum
Minority game is investigated. Different time correlated quantum memory
channels are considered to analyze the Nash equilibrium payoff of the 1st
player. It is seen that the Nash equilibrium payoff is substantially enhanced
due to the presence of ... | 1102.5056v2 |
2011-03-17 | Viscous damping of r-modes: Large amplitude saturation | We analyze the viscous damping of r-mode oscillations of compact stars,
taking into account non-linear viscous effects in the large-amplitude regime.
The qualitatively different cases of hadronic stars, strange quark stars, and
hybrid stars are studied. We calculate the viscous damping times of r-modes,
obtaining numer... | 1103.3521v2 |
2011-05-01 | Viscous damping of nanobeam resonators: humidity, thermal noise and the paddling effect | The nanobeam resonator is the key mechanical component in the
nano-electromechanical system. In addition to its high frequency originating
from its low dimension, the performance is significantly influenced by the
circumstances, especially at nanoscale where a large surface area of the
material is exposed. Molecular dy... | 1105.0139v1 |
2011-06-07 | Damping by branching: a bioinspiration from trees | Man-made slender structures are known to be sensitive to high levels of
vibration, due to their flexibility, which often cause irreversible damage. In
nature, trees repeatedly endure large amplitudes of motion, mostly caused by
strong climatic events, yet with minor or no damage in most cases. A new
damping mechanism i... | 1106.1283v1 |
2011-11-29 | Dispersion and damping of potential surface waves in a degenerate plasma | Potential (electrostatic) surface waves in plasma half-space with degenerate
electrons are studied using the quasi-classical mean-field kinetic model. The
wave spectrum and the collisionless damping rate are obtained numerically for a
wide range of wavelengths. In the limit of long wavelengths, the wave frequency
$\ome... | 1111.6723v1 |
2012-01-29 | Smooth attractors of finite dimension for von Karman evolutions with nonlinear frictional damping localized in a boundary layer | In this paper dynamic von Karman equations with localized interior damping
supported in a boundary collar are considered. Hadamard well-posedness for von
Karman plates with various types of nonlinear damping are well-known, and the
long-time behavior of nonlinear plates has been a topic of recent interest.
Since the vo... | 1201.6072v1 |
2012-06-15 | Landau Damping in a Turbulent Setting | To address the problem of Landau damping in kinetic turbulence, the forcing
of the linearized Vlasov equation by a stationary random source is considered.
It is found that the time-asymptotic density response is dominated by resonant
particle interactions that are synchronized with the source. The energy
consumption of... | 1206.3415v4 |
2012-07-17 | Asymptotic Dynamics of a Class of Coupled Oscillators Driven by White Noises | This paper is devoted to the study of the asymptotic dynamics of a class of
coupled second order oscillators driven by white noises. It is shown that any
system of such coupled oscillators with positive damping and coupling
coefficients possesses a global random attractor. Moreover, when the damping
and the coupling co... | 1207.3864v1 |
2013-10-29 | Influence of sample geometry on inductive damping measurement methods | We study the precession frequency and effective damping of patterned
permalloy thin films of different geometry using integrated inductive test
structures. The test structures consist of coplanar wave guides fabricated onto
patterned permalloy stripes of different geometry. The width, length and
position of the permall... | 1310.7817v1 |
2014-03-13 | The best decay rate of the damped plate equation in a square | In this paper we study the best decay rate of the solutions of a damped plate
equation in a square and with a homogeneous Dirichlet boundary conditions. We
show that the fastest decay rate is given by the supremum of the real part of
the spectrum of the infinitesimal generator of the underlying semigroup, if the
dampin... | 1403.3199v1 |
2014-04-02 | Determination of the cross-field density structuring in coronal waveguides using the damping of transverse waves | Time and spatial damping of transverse magnetohydrodynamic (MHD) kink
oscillations is a source of information on the cross-field variation of the
plasma density in coronal waveguides. We show that a probabilistic approach to
the problem of determining the density structuring from the observed damping of
transverse osci... | 1404.0584v1 |
2014-04-05 | Gilbert damping in noncollinear ferromagnets | The precession and damping of a collinear magnetization displaced from its
equilibrium are described by the Landau-Lifshitz-Gilbert equation. For a
noncollinear magnetization, it is not known how the damping should be
described. We use first-principles scattering theory to investigate the damping
in one-dimensional tra... | 1404.1488v2 |
2014-04-14 | Distributed Approximate Message Passing for Compressed Sensing | In this paper, an efficient distributed approach for implementing the
approximate message passing (AMP) algorithm, named distributed AMP (DAMP), is
developed for compressed sensing (CS) recovery in sensor networks with the
sparsity K unknown. In the proposed DAMP, distributed sensors do not have to
use or know the enti... | 1404.3766v2 |
2014-12-17 | The most metal-rich damped Lyman alpha systems at z>1.5 I: The Data | We present HIRES observations for 30 damped Lyman alpha systems, selected on
the basis of their large metal column densities from previous, lower resolution
data. The measured metal column densities for Fe, Zn, S, Si, Cr, Mn, and Ni are
provided for these 30 systems. Combined with previously observed large metal
column... | 1412.5491v1 |
2015-02-16 | Role of nonlinear anisotropic damping in the magnetization dynamics of topological solitons | The consequences of nonlinear anisotropic damping, driven by the presence of
Rashba spin-orbit coupling in thin ferromagnetic metals, are examined for the
dynamics of topological magnetic solitons such as domain walls, vortices, and
skyrmions. The damping is found to affect Bloch and N\'eel walls differently in
the ste... | 1502.04695v2 |
2015-03-26 | Transient nutations decay in diluted paramagnetic solids: a radiation damping mechanism | Here, a theory of the intensity and concentration dependent damping of
nutation signals observed by Boscaino et al. (Phys. Rev B 48, 7077 (1993);
Phys. Rev. A 59, 4087 (1999)) and by others in various two-level spin systems
is proposed. It is shown that in diluted paramagnetic solids contribution of
dipole-dipole inter... | 1503.07641v2 |
2015-08-17 | Increased magnetic damping of a single domain wall and adjacent magnetic domains detected by spin torque diode in a nanostripe | We use spin-torque resonance to probe simultaneously and separately the
dynamics of a magnetic domain wall and of magnetic domains in a nanostripe
magnetic tunnel junction. Thanks to the large associated resistance variations
we are able to analyze quantitatively the resonant properties of these single
nanoscale magnet... | 1508.04043v1 |
2016-02-22 | Effects of Landau-Lifshitz-Gilbert damping on domain growth | Domain patterns are simulated by the Landau-Lifshitz-Gilbert (LLG) equation
with an easy-axis anisotropy. If the Gilbert damping is removed from the LLG
equation, it merely describes the precession of magnetization with a
ferromagnetic interaction. However, even without the damping, domains that look
similar to those o... | 1602.06673v3 |
2016-04-27 | Influence of nonlocal damping on the field-driven domain wall motion | We derive the complete expression of nonlocal damping in noncollinear
magnetization due to the nonuniform spin current pumped by precessional
magnetization and incorporate it into a generalized Thiele equation to study
its effects on the dynamics of the transverse and vortex domain walls (DWs) in
ferromagnetic nanowire... | 1604.07971v2 |
2016-04-27 | Damping of the Collective Amplitude Mode in Superconductors with Strong Electron-Phonon Coupling | We study the effect of strong electron-phonon interactions on the damping of
the Higgs amplitude mode in superconductors by means of non-equilibrium
dynamical mean-field simulations of the Holstein model. In contrast to the BCS
dynamics, we find that the damping of the Higgs mode strongly depends on the
temperature, be... | 1604.08073v2 |
2016-05-29 | Damped Infinite Energy Solutions of the 3D Euler and Boussinesq Equations | We revisit a family of infinite-energy solutions of the 3D incompressible
Euler equations proposed by Gibbon et al. [9] and shown to blowup in finite
time by Constantin [6]. By adding a damping term to the momentum equation we
examine how the damping coefficient can arrest this blowup. Further, we show
that similar inf... | 1605.08965v3 |
2016-06-14 | Anomalous Damping of a Micro-electro-mechanical Oscillator in Superfluid $^3$He-B | The mechanical resonance properties of a micro-electro-mechanical oscillator
with a gap of 1.25 $\mu$m was studied in superfluid $^3$He-B at various
pressures. The oscillator was driven in the linear damping regime where the
damping coefficient is independent of the oscillator velocity. The quality
factor of the oscill... | 1606.04483v2 |
2016-12-16 | Dynamics of cohering and decohering power under Markovian channels | In this paper, we investigate the cohering and decohering power for the
one-qubit Markovian channels with respect to coherence in terms of the
$l_{1}$-norm, the R$\acute{e}$nyi $\alpha$-relative entropy and the Tsallis
$\alpha$-relative entropy. In the case of $\alpha=2$, the cohering and
decohering power of the amplit... | 1612.05355v1 |
2017-01-19 | Decoherence effects on multiplayer cooperative quantum games | We study the behavior of cooperative multiplayer quantum games [35,36] in the
presence of decoherence using different quantum channels such as amplitude
damping, depolarizing and phase damping. It is seen that the outcomes of the
games for the two damping channels with maximum values of decoherence reduce to
same value... | 1701.05342v1 |
2017-10-09 | Resonant absorption of surface sausage and surface kink modes under photospheric conditions | We study the effect of resonant absorption of surface sausage and surface
kink modes under photospheric conditions where the slow surface sausage modes
undergo resonant damping in the slow continuum and the surface kink modes in
the slow and Alfv\'{e}n continua at the transitional layers. We use recently
derived analyt... | 1710.03350v2 |
2017-11-21 | Nonexistence of global solutions of nonlinear wave equations with weak time-dependent damping related to Glassey conjecture | This work is devoted to the nonexistence of global-in-time energy solutions
of nonlinear wave equation of derivative type with weak time-dependent damping
in the scattering and scale invariant range. By introducing some multipliers to
absorb the damping term, we succeed in establishing the same upper bound of the
lifes... | 1711.07591v2 |
2018-01-03 | Stabilisation of wave equations on the torus with rough dampings | For the damped wave equation on a compact manifold with {\em continuous}
dampings, the geometric control condition is necessary and sufficient for
{uniform} stabilisation. In this article, on the two dimensional torus, in the
special case where $a(x) = \sum\_{j=1}^N a\_j 1\_{x\in R\_j}$ ($R\_j$ are
polygons), we give a... | 1801.00983v2 |
2018-03-12 | Optical Rotation of Levitated Spheres in High Vacuum | A circularly polarized laser beam is used to levitate and control the
rotation of microspheres in high vacuum. At low pressure, rotation frequencies
as high as 6 MHz are observed for birefringent vaterite spheres, limited by
centrifugal stresses. Due to the extremely low damping in high vacuum,
controlled optical rotat... | 1803.04297v1 |
2018-03-23 | A conservation law with spatially localized sublinear damping | We consider a general conservation law on the circle, in the presence of a
sublinear damping. If the damping acts on the whole circle, then the solution
becomes identically zero in finite time, following the same mechanism as the
corresponding ordinary differential equation. When the damping acts only
locally in space,... | 1803.08767v1 |
2019-03-06 | Microwave magnon damping in YIG films at millikelvin temperatures | Magnon systems used in quantum devices require low damping if coherence is to
be maintained. The ferrimagnetic electrical insulator yttrium iron garnet (YIG)
has low magnon damping at room temperature and is a strong candidate to host
microwave magnon excitations in future quantum devices. Monocrystalline YIG
films are... | 1903.02527v3 |
2019-06-25 | Conductivity-Like Gilbert Damping due to Intraband Scattering in Epitaxial Iron | Confirming the origin of Gilbert damping by experiment has remained a
challenge for many decades, even for simple ferromagnetic metals. In this
Letter, we experimentally identify Gilbert damping that increases with
decreasing electronic scattering in epitaxial thin films of pure Fe. This
observation of conductivity-lik... | 1906.10326v2 |
2019-09-21 | Stability for coupled waves with locally disturbed Kelvin-Voigt damping | We consider a coupled wave system with partial Kelvin-Voigt damping in the
interval (-1,1), where one wave is dissipative and the other does not. When the
damping is effective in the whole domain (-1,1) it was proven in H.Portillo
Oquendo and P.Sanez Pacheco, optimal decay for coupled waves with Kelvin-voigt
damping, A... | 1909.09838v1 |
2020-06-30 | Polynomial stabilization of non-smooth direct/indirect elastic/viscoelastic damping problem involving Bresse system | We consider an elastic/viscoelastic transmission problem for the Bresse
system with fully Dirichlet or Dirichlet-Neumann-Neumann boundary conditions.
The physical model consists of three wave equations coupled in certain pattern.
The system is damped directly or indirectly by global or local Kelvin-Voigt
damping. Actua... | 2006.16595v2 |
2020-07-02 | Uniformly-Damped Binomial Filters: Five-percent Maximum Overshoot Optimal Response Design | In this paper, the five-percent maximum overshoot design of uniformly-damped
binomial filters (transfer-functions) is introduced. First, the butterworth
filter response is represented as a damped-binomial filter response. To extend
the maximum-overshoot response of the second-order butterworth to higher
orders, the bin... | 2007.00890v3 |
2020-09-17 | Temperature Dependent Non-linear Damping in Palladium Nano-mechanical Resonators | Advances in nano-fabrication techniques has made it feasible to observe
damping phenomena beyond the linear regime in nano-mechanical systems. In this
work, we report cubic non-linear damping in palladium nano-mechanical
resonators. Nano-scale palladium beams exposed to a $H_2$ atmosphere become
softer and display enha... | 2009.08324v1 |
2020-09-22 | Sharp exponential decay rates for anisotropically damped waves | In this article, we study energy decay of the damped wave equation on compact
Riemannian manifolds where the damping coefficient is anisotropic and modeled
by a pseudodifferential operator of order zero. We prove that the energy of
solutions decays at an exponential rate if and only if the damping coefficient
satisfies... | 2009.10832v2 |
2020-12-25 | Information constraint in open quantum systems | We propose an effect called information constraint which is characterized by
the existence of different decay rates of signal strengths propagating along
opposite directions. It is an intrinsic property of a type of open quantum
system, which does not rely on boundary conditions. We define the value of
information cons... | 2012.13583v3 |
2021-04-29 | Non-linear damping of standing kink waves computed with Elsasser variables | In a previous paper, we computed the energy density and the non-linear energy
cascade rate for transverse kink waves using Elsasser variables. In this paper,
we focus on the standing kink waves, which are impulsively excited in coronal
loops by external perturbations. We present an analytical calculation to
compute the... | 2104.14331v1 |
2021-05-31 | Revisiting the Plasmon Radiation Damping of Gold Nanorods | Noble metal nanoparticles have been utilized for a vast amount of optical
applications. For the applications that used metal nanoparticles as nanosensors
and optical labeling, larger radiation damping is preferred (higher optical
signal). To get a deeper knowledge about the radiation damping of noble metal
nanoparticle... | 2105.14873v1 |
2021-06-23 | Bayesian evidence for a nonlinear damping model for coronal loop oscillations | Recent observational and theoretical studies indicate that the damping of
solar coronal loop oscillations depends on the oscillation amplitude. We
consider two mechanisms, linear resonant absorption and a nonlinear damping
model. We confront theoretical predictions from these models with observed data
in the plane of o... | 2106.12243v1 |
2021-07-13 | Convergence of iterates for first-order optimization algorithms with inertia and Hessian driven damping | In a Hilbert space setting, for convex optimization, we show the convergence
of the iterates to optimal solutions for a class of accelerated first-order
algorithms. They can be interpreted as discrete temporal versions of an
inertial dynamic involving both viscous damping and Hessian-driven damping. The
asymptotically ... | 2107.05943v1 |
2021-12-13 | Effect of interfacial damping on high-frequency surface wave resonance on a nanostrip-bonded substrate | Since surface acoustic waves (SAW) are often generated on substrates to which
nanostrips are periodically attached, it is very important to consider the
effect of interface between the deposited strip and the substrate surface,
which is an unavoidable issue in manufacturing. In this paper, we propose a
theoretical mode... | 2112.06367v1 |
2021-12-13 | Cosmic ray streaming in the turbulent interstellar medium | We study the streaming instability of GeV$-100~$GeV cosmic rays (CRs) and its
damping in the turbulent interstellar medium (ISM). We find that the damping of
streaming instability is dominated by ion-neutral collisional damping in weakly
ionized molecular clouds, turbulent damping in the highly ionized warm medium,
and... | 2112.06941v2 |
2022-05-27 | Scalar field damping at high temperatures | The motion of a scalar field that interacts with a hot plasma, like the
inflaton during reheating, is damped, which is a dissipative process. At high
temperatures the damping can be described by a local term in the effective
equation of motion. The damping coefficient is sensitive to multiple
scattering. In the loop ex... | 2205.14166v2 |
2022-09-13 | Latest results from the DAMPE space mission | The DArk Matter Particle Explorer (DAMPE) is a space-based particle detector
launched on December 17th, 2015 from the Jiuquan Satellite Launch Center
(China). The main goals of the DAMPE mission are the study of galactic cosmic
rays (CR), the electron-positron energy spectrum, gamma-ray astronomy, and
indirect dark mat... | 2209.06014v1 |
2022-10-25 | Microscopic structure of electromagnetic whistler wave damping by kinetic mechanisms in hot magnetized Vlasov plasmas | The kinetic damping mechanism of low frequency transverse perturbations
propagating parallel to the magnetic field in a magnetized warm electron plasma
is simulated by means of electromagnetic (EM) Vlasov simulations. The
short-time-scale damping of the electron magnetohydrodynamic whistler
perturbations and underlying... | 2210.13764v1 |
2022-12-02 | Equivalence between the energy decay of fractional damped Klein-Gordon equations and geometric conditions for damping coefficients | We consider damped $s$-fractional Klein--Gordon equations on $\mathbb{R}^d$,
where $s$ denotes the order of the fractional Laplacian. In the one-dimensional
case $d = 1$, Green (2020) established that the exponential decay for $s \geq
2$ and the polynomial decay of order $s/(4-2s)$ hold if and only if the damping
coeff... | 2212.01029v4 |
2023-01-13 | An artificially-damped Fourier method for dispersive evolution equations | Computing solutions to partial differential equations using the fast Fourier
transform can lead to unwanted oscillatory behavior. Due to the periodic nature
of the discrete Fourier transform, waves that leave the computational domain on
one side reappear on the other and for dispersive equations these are typically
hig... | 2301.05789v1 |
2023-03-07 | Stabilization of the wave equation on larger-dimension tori with rough dampings | This paper deals with uniform stabilization of the damped wave equation. When
the manifold is compact and the damping is continuous, the geometric control
condition is known to be necessary and sufficient. In the case where the
damping is a sum of characteristic functions of polygons on a two-dimensional
torus, a resul... | 2303.03733v4 |
2023-07-10 | The Characteristic Shape of Damping Wings During Reionization | Spectroscopic analysis of Ly$\alpha$ damping wings of bright sources at $z>6$
is a promising way to measure the reionization history of the universe.
However, the theoretical interpretation of the damping wings is challenging due
to the inhomogeneous nature of the reionization process and the proximity
effect of bright... | 2307.04797v1 |
2023-07-17 | Dissipation in solids under oscillatory shear: Role of damping scheme and sample thickness | We study dissipation as a function of sample thickness in solids under global
oscillatory shear applied to the top layer of the sample. Two types of damping
mechanism are considered: Langevin and Dissipative Particle Dynamics (DPD). In
the regime of low driving frequency, and under strain-controlled conditions, we
obse... | 2307.08413v1 |
2023-08-17 | A low-rank algorithm for strongly damped wave equations with visco-elastic damping and mass terms | Damped wave equations have been used in many real-world fields. In this
paper, we study a low-rank solution of the strongly damped wave equation with
the damping term, visco-elastic damping term and mass term. Firstly, a
second-order finite difference method is employed for spatial discretization.
Then, we receive a se... | 2308.08888v2 |
2023-10-30 | Optimal backward uniqueness and polynomial stability of second order equations with unbounded damping | For general second order evolution equations, we prove an optimal condition
on the degree of unboundedness of the damping, that rules out finite-time
extinction. We show that control estimates give energy decay rates that
explicitly depend on the degree of unboundedness, and establish a dilation
method to turn existing... | 2310.19911v1 |
2023-11-27 | Gilbert damping in two-dimensional metallic anti-ferromagnets | A finite spin life-time of conduction electrons may dominate Gilbert damping
of two-dimensional metallic anti-ferromagnets or anti-ferromagnet/metal
heterostructures. We investigate the Gilbert damping tensor for a typical
low-energy model of a metallic anti-ferromagnet system with honeycomb magnetic
lattice and Rashba... | 2311.16268v2 |
2024-01-18 | Real-space nonlocal Gilbert damping from exchange torque correlation applied to bulk ferromagnets and their surfaces | In this work we present an ab initio scheme based on linear response theory
of exchange torque correlation, implemented into the real-space
Korringa-Kohn-Rostoker (RS-KKR) framework to calculate diagonal elements of the
atomic-site-dependent intrinsic Gilbert damping tensor. The method is first
applied to bcc iron and ... | 2401.09938v2 |
2024-03-12 | Modulational instability of nonuniformly damped, broad-banded waves: applications to waves in sea-ice | This paper sets out to explore the modulational (or Benjamin-Feir)
instability of a monochromatic wave propagating in the presence of damping such
as that induced by sea-ice on the ocean surface. The fundamental wave motion is
modelled using the spatial Zakharov equation, to which either uniform or
non-uniform (frequen... | 2403.07425v1 |
2006-01-10 | On the variation of the fine-structure constant: Very high resolution spectrum of QSO HE 0515-4414 | We present a detailed analysis of a very high resolution (R\approx 112,000)
spectrum of the quasar HE 0515-4414 obtained using the High Accuracy Radial
velocity Planet Searcher (HARPS) mounted on the ESO 3.6 m telescope at the La
Silla observatory. The HARPS spectrum, of very high wavelength calibration
accuracy (bette... | 0601194v1 |
2008-09-08 | The Impact of HI in Galaxies on 21-cm Intensity Fluctuations During the Reionisation Epoch | We investigate the impact of neutral hydrogen (HI) in galaxies on the
statistics of 21-cm fluctuations using analytic and semi-numerical modelling.
Following the reionisation of hydrogen the HI content of the Universe is
dominated by damped absorption systems (DLAs), with a cosmic density in HI that
is observed to be c... | 0809.1271v1 |
2009-07-24 | An Observational Determination of the Proton to Electron Mass Ratio in the Early Universe | In an effort to resolve the discrepancy between two measurements of the
fundamental constant mu, the proton to electron mass ratio, at early times in
the universe we reanalyze the same data used in the earlier studies. Our
analysis of the molecular hydrogen absorption lines in archival VLT/UVES
spectra of the damped Ly... | 0907.4392v1 |
2009-07-31 | A physical interpretation of the variability power spectral components in accreting neutron stars | We propose a physical framework for interpreting the characteristic
frequencies seen in the broad band power spectra from black hole and neutron
star binaries. We use the truncated disc/hot inner flow geometry, and assume
that the hot flow is generically turbulent. Each radius in the hot flow
produces fluctuations, and... | 0907.5485v3 |
2010-07-15 | Noncommutative Double Scalar Fields in FRW Cosmology as Cosmical Oscillators | We investigate effects of noncommutativity of phase space generated by two
scalar fields conformally coupled to curvature in FRW cosmology. We restrict
deformation of minisuperspace to noncommutativity between scalar fields and
between their canonical conjugate momenta. The investigation is carried out by
means of comp... | 1007.2499v2 |
2011-06-07 | Rhythms of Memory and Bits on Edge: Symbol Recognition as a Physical Phenomenon | Preoccupied with measurement, physics has neglected the need, before anything
can be measured, to recognize what it is that is to be measured. The
recognition of symbols employs a known physical mechanism. The elemental
mechanism-a damped inverted pendulum joined by a driven adjustable pendulum (in
effect a clock)-both... | 1106.1639v1 |
2014-12-17 | Cosmology based on $f(R)$ gravity with ${\cal O}(1)$ eV sterile neutrino | We address the cosmological role of an additional ${\cal O}(1)$ eV sterile
neutrino in modified gravity models. We confront the present cosmological data
with predictions of the FLRW cosmological model based on a variant of $f(R)$
modified gravity proposed by one of the authors previously. This viable
cosmological mode... | 1412.5239v2 |
2021-07-09 | Casimir densities induced by a sphere in the hyperbolic vacuum of de Sitter spacetime | Complete set of modes and the Hadamard function are constructed for a scalar
field inside and outside a sphere in (D+1)-dimensional de Sitter spacetime
foliated by negative constant curvature spaces. We assume that the field obeys
Robin boundary condition on the sphere. The contributions in the Hadamard
function induce... | 2107.04376v1 |
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 |
2020-11-30 | Role of Compressive Viscosity and Thermal Conductivity on the Damping of Slow Waves in the Coronal Loops With and Without Heating-Cooling Imbalance | In the present paper, we derive a new dispersion relation for slow
magnetoacoustic waves invoking the effect of thermal conductivity, compressive
viscosity, radiation and unknown heating term along with the consideration of
heating cooling imbalance from linearized MHD equations. We solve the general
dispersion relatio... | 2011.14519v2 |
2013-10-23 | Fundamental constants and high resolution spectroscopy | Absorption-line systems detected in high resolution quasar spectra can be
used to compare the value of dimensionless fundamental constants such as the
fine-structure constant, alpha, and the proton-to-electron mass ratio, mu =
m_p/m_e, as measured in remote regions of the Universe to their value today on
Earth. In rece... | 1310.6280v1 |
2012-10-26 | A Measurement of the Cosmic Microwave Background Damping Tail from the 2500-square-degree SPT-SZ survey | We present a measurement of the cosmic microwave background (CMB) temperature
power spectrum using data from the recently completed South Pole Telescope
Sunyaev-Zel'dovich (SPT-SZ) survey. This measurement is made from observations
of 2540 deg$^2$ of sky with arcminute resolution at $150\,$GHz, and improves
upon previo... | 1210.7231v2 |
1993-06-22 | Weakly Damped Modes in Star Clusters and Galaxies | A perturber may excite a coherent mode in a star cluster or galaxy. If the
stellar system is stable, it is commonly assumed that such a mode will be
strongly damped and therefore of little practical consequence other than
redistributing momentum and energy deposited by the perturber. This paper
demonstrates that this a... | 9306020v1 |
1997-12-03 | On the Evolution of Damped Lyman Alpha Systems to Galactic Disks | The mean metallicity of the thick disk of the Galaxy is 0.5 dex higher than
that of the damped Lyman alpha systems. This has been interpreted to argue that
stars in the former do not arise out of gas in the latter. Using new
metallicity and H I column-density data we show the metal-rich damped systems
do contain suffic... | 9712050v1 |
1998-10-23 | Chemical Abundances of the Damped Lya Systems at z>1.5 | We present chemical abundance measurements for 19 damped lya systems observed
with HIRES on the 10m W.M. Keck Telescope. Our principal goal is to investigate
the abundance patterns of the damped systems and thereby determine the
underlying physical processes which dominate their chemical evolution. We place
particular ... | 9810381v1 |
2002-04-03 | The role of damped Alfven waves on magnetospheric accretion models of young stars | We examine the role of Alfven wave damping in heating the plasma in the
magnetic funnels of magnetospheric accretion models of young stars. We study
four different damping mechanisms of the Alfven waves: nonlinear, turbulent,
viscous-resistive and collisional. Two different possible origins for the
Alfven waves are dis... | 0204056v1 |
2009-09-19 | Resonantly Damped Kink Magnetohydrodynamic Waves in a Partially Ionized Filament Thread | Transverse oscillations of solar filament and prominence threads have been
frequently reported. These oscillations have the common features of being of
short period (2-10 min) and being damped after a few periods. Kink
magnetohydrodynamic (MHD) wave modes have been proposed as responsible for the
observed oscillations,... | 0909.3599v1 |
2009-10-15 | Time damping of non-adiabatic magnetohydrodynamic waves in a partially ionized prominence plasma: Effect of helium | Prominences are partially ionized, magnetized plasmas embedded in the solar
corona. Damped oscillations and propagating waves are commonly observed. These
oscillations have been interpreted in terms of magnetohydrodynamic (MHD) waves.
Ion-neutral collisions and non-adiabatic effects (radiation losses and thermal
conduc... | 0910.2883v1 |
2009-12-21 | The effect of longitudinal flow on resonantly damped kink oscillations | The most promising mechanism acting towards damping the kink oscillations of
coronal loops is resonant absorption. In this context most of previous studies
neglected the effect of the obvious equilibrium flow along magnetic field
lines. The flows are in general sub-Alfv\'enic and hence comparatively slow.
Here we inves... | 0912.4136v1 |
2010-07-12 | Seismology of Standing Kink Oscillations of Solar Prominence Fine Structures | We investigate standing kink magnetohydrodynamic (MHD) oscillations in a
prominence fine structure modeled as a straight and cylindrical magnetic tube
only partially filled with the prominence material, and with its ends fixed at
two rigid walls representing the solar photosphere. The prominence plasma is
partially ion... | 1007.1959v2 |
2012-10-30 | Mode- and size-dependent Landau-Lifshitz damping in magnetic nanostructures: Evidence for non-local damping | We demonstrate a strong dependence of the effective damping on the nanomagnet
size and the particular spin-wave mode that can be explained by the theory of
intralayer transverse-spin-pumping. The effective Landau-Lifshitz damping is
measured optically in individual, isolated nanomagnets as small as 100 nm. The
measurem... | 1210.8118v3 |
2012-11-21 | Kinetic theory of surface plasmon polariton in semiconductor nanowires | Based on the semiclassical model Hamiltonian of the surface plasmon polariton
and the nonequilibrium Green-function approach, we present a microscopic
kinetic theory to study the influence of the electron scattering on the
dynamics of the surface plasmon polariton in semiconductor nanowires. The
damping of the surface ... | 1211.5055v2 |
2013-11-12 | Damping filter method for obtaining spatially localized solutions | Spatially localized structures are key components of turbulence and other
spatio-temporally chaotic systems. From a dynamical systems viewpoint, it is
desirable to obtain corresponding exact solutions, though their existence is
not guaranteed. A damping filter method is introduced to obtain variously
localized solution... | 1311.2792v2 |
2014-09-19 | Highly confined low-loss plasmons in graphene-boron nitride heterostructures | Graphene plasmons were predicted to possess ultra-strong field confinement
and very low damping at the same time, enabling new classes of devices for deep
subwavelength metamaterials, single-photon nonlinearities, extraordinarily
strong light-matter interactions and nano-optoelectronic switches. While all of
these grea... | 1409.5674v1 |
2015-09-02 | Energy Dependence of Synchrotron X-Ray Rims in Tycho's Supernova Remnant | Several young supernova remnants exhibit thin X-ray bright rims of
synchrotron radiation at their forward shocks. Thin rims require strong
magnetic field amplification beyond simple shock compression if rim widths are
only limited by electron energy losses. But, magnetic field damping behind the
shock could produce sim... | 1509.00877v1 |
2016-02-02 | Forward Modelling of Propagating Slow Waves in Coronal Loops and Their Frequency-Dependent Damping | Propagating slow waves in coronal loops exhibit a damping which depends upon
the frequency of the waves. In this study we aim to investigate the
relationship of the damping length (L$_d$) with the frequency of the
propagating wave. We present a 3-D coronal loop model with uniform density and
temperature and investigate... | 1602.00787v1 |
2016-05-11 | Damping of prominence longitudinal oscillations due to mass accretion | We study the damping of longitudinal oscillations of a prominence thread
caused by the mass accretion. In this model we considered a thin curved
magnetic tube filled with the plasma. The parts of the tube at the two sides of
the thread are filled with hot rarefied plasma. We assume that there are flows
of rarefied plas... | 1605.03376v1 |
2016-11-17 | Inductive detection of field-like and damping-like AC inverse spin-orbit torques in ferromagnet/normal metal bilayers | Functional spintronic devices rely on spin-charge interconversion effects,
such as the reciprocal processes of electric field-driven spin torque and
magnetization dynamics-driven spin and charge flow. Both damping-like and
field-like spin-orbit torques have been observed in the forward process of
current-driven spin to... | 1611.05798v2 |
2017-01-04 | Controlling plasmon modes and damping in buckled two-dimensional material open systems | Full ranges of both hybrid plasmon-mode dispersions and their damping are
studied systematically by our recently developed mean-field theory in open
systems involving a conducting substrate and a two-dimensional (2D) material
with a buckled honeycomb lattice, such as silicene, germanene, and a group
\rom{4} dichalcogen... | 1701.01084v1 |
2017-04-05 | Stimulated Brillouin scattering behaviors in different species ignition hohlraum plasmas in high-temperature and high-density region | The presence of multiple ion species can add additional branches to the IAW
dispersion relation and change the Landau damping significantly. Different IAW
modes excited by stimulated Brillouin scattering (SBS) and different SBS
behaviors in several typical ignition hohlraum plasmas in the high-temperature
and high-dens... | 1704.02317v1 |
2017-06-29 | Resonant Absorption of Axisymmetric Modes in Twisted Magnetic Flux Tubes | It has been shown recently that magnetic twist and axisymmetric MHD modes are
ubiquitous in the solar atmosphere and therefore, the study of resonant
absorption for these modes have become a pressing issue as it can have
important consequences for heating magnetic flux tubes in the solar atmosphere
and the observed dam... | 1706.09665v1 |
2017-08-16 | Damping of an oscillating scalar field indirectly coupled to a thermal bath | The damping process of a homogeneous oscillating scalar field that indirectly
interacts with a thermal bath through a mediator field is investigated over a
wide range of model parameters. We consider two types of mediator fields, those
that can decay to the thermal bath and those that are individually stable but
pair a... | 1708.04865v2 |
2018-09-14 | Continuous and discrete damping reduction for systems with quadratic interaction | We study the connection between Lagrangian and Hamiltonian descriptions of
closed/open dynamics, for a collection of particles with quadratic interaction
(closed system) and a sub-collection of particles with linear damping (open
system). We consider both continuous and discrete versions of mechanics. We
define the Dam... | 1809.05532v1 |
2020-05-31 | Optimal decay rates of the compressible Euler equations with time-dependent damping in $\mathbb R^n$: (II) over-damping case | This paper is concerned with the multi-dimensional compressible Euler
equations with time-dependent over-damping of the form
$-\frac{\mu}{(1+t)^\lambda}\rho\boldsymbol u$ in $\mathbb R^n$, where $n\ge2$,
$\mu>0$, and $\lambda\in[-1,0)$. This continues our previous work dealing with
the under-damping case for $\lambda\i... | 2006.00403v1 |
2020-07-07 | Nonlinear viscoelastic isolation for seismic vibration mitigation | The aim of this paper is to assess the effectiveness of nonlinear
viscoelastic damping in controlling base-excited vibrations. Specifically, the
focus is on investigating the robustness of the nonlinear base isolation
performance in controlling the system response due to a wide set of possible
excitation spectra. The d... | 2007.04378v1 |
2021-01-20 | Damped perturbations in stellar systems: Genuine modes and Landau-damped waves | This research was stimulated by the recent studies of damping solutions in
dynamically stable spherical stellar systems. Using the simplest model of the
homogeneous stellar medium, we discuss nontrivial features of stellar systems.
Taking them into account will make it possible to correctly interpret the
results obtain... | 2101.08287v2 |
2021-03-10 | Dynamical Pose Estimation | We study the problem of aligning two sets of 3D geometric primitives given
known correspondences. Our first contribution is to show that this primitive
alignment framework unifies five perception problems including point cloud
registration, primitive (mesh) registration, category-level 3D registration,
absolution pose ... | 2103.06182v3 |
2021-04-13 | Apparent nonlinear damping triggered by quantum fluctuations | Nonlinear damping, the change in damping rate with the amplitude of
oscillations plays an important role in many electrical, mechanical and even
biological oscillators. In novel technologies such as carbon nanotubes,
graphene membranes or superconducting resonators, the origin of nonlinear
damping is sometimes unclear.... | 2104.06464v2 |
2023-07-26 | Improving frequency response with synthetic damping available from fleets of distributed energy resources | With the increasing use of renewable generation in power systems, responsive
resources will be necessary to support primary frequency control in future
low-inertia/under-damped power systems. Flexible loads can provide
fast-frequency response services if coordinated effectively. However, practical
implementations of su... | 2307.14498v1 |
2023-12-11 | Possible Contamination of the Intergalactic Medium Damping Wing in ULAS J1342+0928 by Proximate Damped Ly$α$ Absorption | The red damping wing from neutral hydrogen in the intergalactic medium is a
smoking-gun signal of ongoing reionization. One potential contaminant of the
intergalactic damping wing signal is dense gas associated with foreground
galaxies, which can give rise to proximate damped Ly$\alpha$ absorbers. The
Ly$\alpha$ imprin... | 2312.06747v1 |
2024-02-13 | Forecasts for Constraining Lorentz-violating Damping of Gravitational Waves from Compact Binary Inspirals | Violation of Lorentz symmetry can result in two distinct effects in the
propagation of the gravitational waves (GWs). One is a modified dispersion
relation and another is a frequency-dependent damping of GWs. While the former
has been extensively studied in the literature, in this paper we concentrate on
the frequency-... | 2402.08240v2 |
2024-03-13 | Thermal Hall effect incorporating magnon damping in localized spin systems | We propose a theory for thermal Hall transport mediated by magnons to address
the impact of their damping resulting from magnon-magnon interactions in
insulating magnets. This phenomenon is anticipated to be particularly
significant in systems characterized by strong quantum fluctuations,
exemplified by spin-1/2 system... | 2403.08478v1 |
2024-04-02 | A recipe for eccentricity and inclination damping for partial gap opening planets in 3D disks | In a previous paper we showed that, like the migration speed, the
eccentricity damping efficiency is modulated linearly by the depth of the
partial gap a planet carves in the disk surface density profile, resulting in
less efficient $e$-damping compared to the prescription commonly used in
population synthesis works. H... | 2404.02247v1 |
2009-08-21 | Surface Alfven Wave Damping in a 3D Simulation of the Solar Wind | Here we investigate the contribution of surface Alfven wave damping to the
heating of the solar wind in minima conditions. These waves are present in
regions of strong inhomogeneities in density or magnetic field (e. g., the
border between open and closed magnetic field lines). Using a 3-dimensional
Magnetohydrodynamic... | 0908.3146v1 |
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