publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2022-07-27 | Subsonic time-periodic solution to compressible Euler equations with damping in a bounded domain | In this paper, we consider the one-dimensional isentropic compressible Euler
equations with linear damping $\beta(t,x)\rho u$ in a bounded domain, which can
be used to describe the process of compressible flows through a porous
medium.~And the model is imposed a dissipative subsonic time-periodic boundary
condition.~Ou... | 2207.13433v1 |
2022-09-10 | Landau damping on the torus for the Vlasov-Poisson system with massless electrons | This paper studies the nonlinear Landau damping on the torus $\mathbb{T}^d$
for the Vlasov-Poisson system with massless electrons (VPME). We consider
solutions with analytic or Gevrey ($\gamma > 1/3$) initial data, close to a
homogeneous equilibrium satisfying a Penrose stability condition. We show that
for such soluti... | 2209.04676v2 |
2022-09-25 | Polynomial mixing of a stochastic wave equation with dissipative damping | We study the long time statistics of a class of semi--linear wave equations
modeling the motions of a particle suspended in continuous media while being
subjected to random perturbations via an additive Gaussian noise. By comparison
with the nonlinear reaction settings, of which the solutions are known to
possess geome... | 2209.12151v2 |
2022-09-30 | A Lyapunov approach for the exponential stability of a damped Timoshenko beam | In this technical note, we consider the stability properties of a viscously
damped Timoshenko beam equation with spatially varying parameters. With the
help of the port-Hamiltonian framework, we first prove the existence of
solutions and show, by an appropriate Lyapunov function, that the system is
exponentially stable... | 2209.15281v1 |
2022-11-01 | Well-posedness and strong attractors for a beam model with degenerate nonlocal strong damping | This paper is devoted to initial-boundary value problem of an extensible beam
equation with degenerate nonlocal energy damping in
$\Omega\subset\mathbb{R}^n$: $u_{tt}-\kappa\Delta u+\Delta^2u-\gamma(\Vert
\Delta u\Vert^2+\Vert u_t\Vert^2)^q\Delta u_t+f(u)=0$. We prove the global
existence and uniqueness of weak solutio... | 2211.00287v3 |
2022-11-18 | Energy decay estimates for an axially travelling string damped at one end | We study the small vibrations of an axially travelling string with a
dashpoint damping at one end. The string is modelled by a wave equation in a
time-dependent interval with two endpoints moving at a constant speed $v$. For
the undamped case, we obtain a conserved functional equivalent to the energy of
the solution. W... | 2211.10537v1 |
2022-12-01 | The viscous damping of three dimensional spherical gas bubble inside unbounded compressible liquid | The present paper considers a homogeneous bubble inside an unbounded
polytropic compressible liquid with viscosity. The system is governed by the
Navier-Stokes equation with free boundary which is determined by the kinematic
and dynamic boundary conditions on the bubble-liquid interface. The global
existence of solutio... | 2212.00299v1 |
2022-12-27 | Stabilization of the Kawahara-Kadomtsev-Petviashvili equation with time-delayed feedback | Results of stabilization for the higher order of the Kadomtsev-Petviashvili
equation are presented in this manuscript. Precisely, we prove with two
different approaches that under the presence of a damping mechanism and an
internal delay term (anti-damping) the solutions of the
Kawahara-Kadomtsev-Petviashvili equation ... | 2212.13552v1 |
2023-03-11 | Control estimates for 0th order pseudodifferential operators | We introduce the control conditions for 0th order pseudodifferential
operators $\mathbf{P}$ whose real parts satisfy the Morse--Smale dynamical
condition. We obtain microlocal control estimates under the control conditions.
As a result, we show that there are no singular profiles in the solution to the
evolution equati... | 2303.06443v2 |
2023-03-25 | Existence and regularity of global attractors for a Kirchhoff wave equation with strong damping and memory | This paper is concerned with the existence and regularity of global attractor
$\mathcal A$ for a Kirchhoff wave equation with strong damping and memory in
the weighted time-dependent spaces $\mathcal H$ and $\mathcal H^{1}$,
respectively. In order to obtain the existence of $\mathcal A$, we mainly use
the energy method... | 2303.14387v1 |
2023-03-27 | Linear Landau damping for a two-species Vlasov-Poisson system for electrons and ions | This paper concerns the linear Landau damping for the two species
Vlasov-Poisson system for ions and electrons near Penrose stable equilibria.
The result is an extension of the result on the one species Vlasov-Poisson
equation by Mouhout and Villani. Different from their work we do not describe
the ions as a background... | 2303.14981v2 |
2023-03-28 | Role of intersublattice exchange interaction on ultrafast longitudinal and transverse magnetization dynamics in Permalloy | We report about element specific measurements of ultrafast demagnetization
and magnetization precession damping in Permalloy (Py) thin films.
Magnetization dynamics induced by optical pump at $1.5$eV is probed
simultaneously at the $M_{2,3}$ edges of Ni and Fe with High order Harmonics
for moderate demagnetization rate... | 2303.15837v1 |
2023-03-31 | Polynomial Mixing for a Weakly Damped Stochastic Nonlinear Schrödinger Equation | This paper is devoted to proving the polynomial mixing for a weakly damped
stochastic nonlinear Schr\"{o}dinger equation with additive noise on a 1D
bounded domain. The noise is white in time and smooth in space. We consider
both focusing and defocusing nonlinearities, respectively, with exponents of
the nonlinearity $... | 2303.18082v1 |
2023-04-19 | Inviscid damping of monotone shear flows for 2D inhomogeneous Euler equation with non-constant density in a finite channel | We prove the nonlinear inviscid damping for a class of monotone shear flows
with non-constant background density for the two-dimensional ideal
inhomogeneous fluids in $\mathbb{T}\times [0,1]$ when the initial perturbation
is in Gevrey-$\frac{1}{s}$ ($\frac{1}{2}<s<1$) class with compact support. | 2304.09841v2 |
2023-05-07 | Nonexistence of global weak solutions to semilinear wave equations involving time-dependent structural damping terms | We consider a semilinear wave equation involving a time-dependent structural
damping term of the form
$\displaystyle\frac{1}{{(1+t)}^{\beta}}(-\Delta)^{\sigma/2} u_t$. Our results
show the influence of the parameters $\beta,\sigma$ on the nonexistence of
global weak solutions under assumptions on the given system data. | 2305.04278v1 |
2023-05-15 | Blow-up phenomena for a class of extensible beam equations | In this paper, we investigate the initial boundary value problem of the
following nonlinear extensible beam equation with nonlinear damping term $$u_{t
t}+\Delta^2 u-M\left(\|\nabla u\|^2\right) \Delta u-\Delta
u_t+\left|u_t\right|^{r-1} u_t=|u|^{p-1} u$$ which was considered by Yang et
al. (Advanced Nonlinear Studies ... | 2305.08398v1 |
2023-06-08 | Vanishing of long time average p-enstrophy dissipation rate in the inviscid limit of the 2D damped Navier-Stokes equations | In 2007, Constantin and Ramos proved a result on the vanishing long time
average enstrophy dissipation rate in the inviscid limit of the 2D damped
Navier-Stokes equations. In this work, we prove a generalization of this for
the p-enstrophy, sequences of distributions of initial data and sequences of
strongly converging... | 2306.05081v1 |
2023-06-16 | Algorithm MGB to solve highly nonlinear elliptic PDEs in $\tilde{O}(n)$ FLOPS | We introduce Algorithm MGB (Multi Grid Barrier) for solving highly nonlinear
convex Euler-Lagrange equations. This class of problems includes many highly
nonlinear partial differential equations, such as $p$-Laplacians. We prove
that, if certain regularity hypotheses are satisfied, then our algorithm
converges in $\til... | 2306.10183v1 |
2023-07-24 | On the stability of a double porous elastic system with visco-porous dampings | In this paper we consider a one dimensional elastic system with double
porosity structure and with frictional damping in both porous equations. We
introduce two stability numbers $\chi_{0}$ and $\chi_{1}$ and prove that the
solution of the system decays exponentially provided that $\chi_{0}=0$ and
$\chi_{1}\neq0.$ Othe... | 2307.12690v1 |
2023-08-02 | Blow-up and lifespan estimate for the generalized tricomi equation with the scale-invariant damping and time derivative nonlinearity on exterior domain | The article is devoted to investigating the initial boundary value problem
for the damped wave equation in the scale-invariant case with time-dependent
speed of propagation on the exterior domain. By presenting suitable multipliers
and applying the test-function technique, we study the blow-up and the lifespan
of the s... | 2308.01272v2 |
2023-08-03 | Gravitational Wave Heating | It was shown in previous work that when a gravitational wave (GW) passes
through a viscous shell of matter the magnitude of the GW will be damped and
there are astrohysical circumstances in which the damping is almost complete.
The energy transfer from the GWs to the fluid will increase its temperature. We
construct a ... | 2308.01615v2 |
2023-08-08 | Stabilization of piezoelectric beam with Coleman-Gurtin or Gurtin-Pipkin thermal law and under Lorenz gauge condition | In this paper, we present the analysis of stability for a piezoelectric beam
subject to a thermal law (Coleman-Gurtin or Gurtin-Pipkin thermal law) adding
some viscous damping mechanism to the electric field in $x-$direction and
$z-$direction, and we discuss several cases. Then, there is no need to control
the electric... | 2308.04231v2 |
2023-08-11 | Well-posedness and global attractor for wave equation with nonlinear damping and super-cubic nonlinearity | In the paper, we study the semilinear wave equation involving the nonlinear
damping $g(u_t) $ and nonlinearity $f(u)$. Under the wider ranges of exponents
of $g$ and $f$, the well-posedness of the weak solution is achieved by
establishing a priori space-time estimates. Then, the existence of the global
attractor in the... | 2308.06208v1 |
2023-08-16 | Stability for degenerate wave equations with drift under simultaneous degenerate damping | In this paper we study the stability of two different problems. The first one
is a one-dimensional degenerate wave equation with degenerate damping,
incorporating a drift term and a leading operator in non-divergence form. In
the second problem we consider a system that couples degenerate and
non-degenerate wave equati... | 2308.08645v3 |
2023-09-02 | Existence and nonexistence of global solutions for time-dependent damped NLS equations | We investigate the Cauchy problem for the nonlinear Schr\"odinger equation
with a time-dependent linear damping term. Under non standard assumptions on
the loss dissipation, we prove the blow-up in the inter-critical regime, and
the global existence in the energy subcritical case. Our results generalize and
improve the... | 2309.00849v1 |
2023-09-09 | Finite-dimensionality of attractors for wave equations with degenerate nonlocal damping | In this paper we study the fractal dimension of global attractors for a class
of wave equations with (single-point) degenerate nonlocal damping. Both the
equation and its linearization degenerate into linear wave equations at the
degenerate point and the usual approaches to bound the dimension of the
entirety of attrac... | 2309.04712v2 |
2023-09-19 | The Raman gap and collisional absorption | One of the long-standing puzzles observed in many laser-plasma experiments is
the gap in the Raman backscattering spectrum. This gap is characterized by the
absence of backscattered light between some critical wavelength and twice the
incident laser wavelength. The latter is associated with the absolute Raman
instabili... | 2309.10366v1 |
2023-09-28 | On inverse problems for a strongly damped wave equation on compact manifolds | We consider a strongly damped wave equation on compact manifolds, both with
and without boundaries, and formulate the corresponding inverse problems. For
closed manifolds, we prove that the metric can be uniquely determined, up to an
isometry, from the knowledge of the source-to-solution map. Similarly, for
manifolds w... | 2309.16182v1 |
2023-10-10 | Emerging Spin-Orbit Torques in Low Dimensional Dirac Materials | We report a theoretical description of novel spin-orbit torque components
emerging in two-dimensional Dirac materials with broken inversion symmetry. In
contrast to usual metallic interfaces where field-like and damping-like torque
components are competing, we find that an intrinsic damping-like torque which
derives fr... | 2310.06447v1 |
2023-10-22 | The residual flow in well-optimized stellarators | The gyrokinetic theory of the residual flow, in the electrostatic limit, is
revisited, with optimized stellarators in mind. We consider general initial
conditions for the problem, and identify cases that lead to a non-zonal
residual electrostatic potential, i.e. one having a significant component that
varies within a f... | 2310.14218v1 |
2023-10-26 | Efficient Numerical Algorithm for Large-Scale Damped Natural Gradient Descent | We propose a new algorithm for efficiently solving the damped Fisher matrix
in large-scale scenarios where the number of parameters significantly exceeds
the number of available samples. This problem is fundamental for natural
gradient descent and stochastic reconfiguration. Our algorithm is based on
Cholesky decomposi... | 2310.17556v1 |
2023-11-09 | Exponential convergence to steady-states for trajectories of a damped dynamical system modelling adhesive strings | We study the global well-posedness and asymptotic behavior for a semilinear
damped wave equation with Neumann boundary conditions, modelling a
one-dimensional linearly elastic body interacting with a rigid substrate
through an adhesive material. The key feature of of the problem is that the
interplay between the nonlin... | 2311.05295v1 |
2023-11-29 | On the exponential stability of uniformly damped wave equations | We study damped wave propagation problems phrased as abstract evolution
equations in Hilbert spaces. Under some general assumptions, including a
natural compatibility condition for initial values, we establish exponential
decay estimates for all mild solutions using the language and tools of Hilbert
complexes. This fra... | 2311.18084v1 |
2023-12-01 | Semilinear wave inequalities with double damping and potential terms on Riemannian Manifolds | We study a semilinear wave inequality with double damping on a complete
noncompact Riemannian manifold. The considered problem involves a potential
function $V$ depending on the space variable in front of the power nonlinearity
and an inhomogeneous term $W$ depending on both time and space variables.
Namely, we establi... | 2312.00617v1 |
2024-01-23 | Revisit on global existence of solutions for semilinear damped wave equations in $\mathbb{R}^N$ with noncompactly supported initial data | In this note, we study the Cauchy problem of the semilinear damped wave
equation and our aim is the small data global existence for noncompactly
supported initial data. For this problem, Ikehata and Tanizawa [5] introduced
the energy method with the exponential-type weight function $e^{|x|^2/(1+t)}$,
which is the so-ca... | 2401.12530v1 |
2024-01-24 | Eigenmode analysis of the damped Jaynes-Cummings model | The generating functions for density matrix elements of the Jaynes-Cummings
model with cavity damping are analysed in terms of their eigenmodes, which are
characterised by a specific temporal behaviour. These eigenmodes are shown to
be proportional to particular generalised hypergeometric functions. The
relative weight... | 2401.13348v1 |
2024-02-15 | A comprehensive modelling and experimental approach for damped oscillations in U-tubes via Easy JavaScript Simulations | In recent years, science simulations have become popular among educators due
to their educational usefulness, availability, and potential for increasing the
students' knowledge on scientific topics. In this paper, we introduce the
implementation of a user-friendly simulation based on Easy Java/JavaScript
Simulations (E... | 2402.09866v1 |
2024-02-21 | Hybrid Multi-Directional Quantum Communication Protocol | The way a new type of state called a hybrid state, which contains more than
one degree of freedom, is used in many practical applications of quantum
communication tasks with lesser amount of resources. Similarly, our aim is here
to perform multi-quantum communication tasks in a protocol to approach quantum
information ... | 2402.14043v1 |
2024-03-19 | Damped energy-norm a posteriori error estimates for fully discrete approximations of the wave equation using C2-reconstructions | We derive a posteriori error estimates for the the scalar wave equation
discretized in space by continuous finite elements and in time by the explicit
leapfrog scheme. Our analysis combines the idea of invoking extra
time-regularity for the right-hand side, as previously introduced in the space
semi-discrete setting, w... | 2403.12954v1 |
2004-04-16 | Transport coefficients for inelastic Maxwell mixtures | The Boltzmann equation for inelastic Maxwell models is used to determine the
Navier-Stokes transport coefficients of a granular binary mixture in $d$
dimensions. The Chapman-Enskog method is applied to solve the Boltzmann
equation for states near the (local) homogeneous cooling state. The mass, heat,
and momentum fluxe... | 0404386v2 |
2006-12-12 | Investigating Diffusion Coefficient Using Dynamic Light Scattering Technique | In this work, the Z-average, effective, apparent diffusion coefficients and
their poly-dispersity indexes were investigated for dilute poly-disperse
homogeneous spherical particles in dispersion where the Rayleigh-Gans-Debye
approximation is valid. The results reveal that the values of the apparent and
effective diffus... | 0612101v1 |
2013-06-19 | Conditional Stability for Single Interior Measurement | An inverse problem to identify unknown coefficients of a partial differential
equation by a single interior measurement is considered. The equation
considered in this paper is a strongly elliptic second order scalar equation
which can have complex coefficients in a bounded domain with $C^2$ boundary and
single interior... | 1306.4433v2 |
2016-04-04 | Combinatorics on several families of Kronecker coefficients related to plane partitions | We present a study of three families of Kronecker coefficients, which we
describe in terms of reduced Kronecker coefficients. This study is grounded on
the generating function of the coefficients, proved by a bijection between two
combinatorial objects. This study includes the connection between plane
partitions and th... | 1604.00803v1 |
2022-06-29 | Complexity of representations of coefficients of power series in classical statistical mechanics. Their classification and complexity criteria | It is declared that the aim of simplifying representations of coefficients of
power series of classical statistical mechanics is to simplify a process of
obtaining estimates of the coefficients using their simplified representations.
The aim of the article is: to formulate criteria for the complexity (from the
above po... | 2207.07583v1 |
2023-09-15 | Doeblin Coefficients and Related Measures | Doeblin coefficients are a classical tool for analyzing the ergodicity and
exponential convergence rates of Markov chains. Propelled by recent works on
contraction coefficients of strong data processing inequalities, we investigate
whether Doeblin coefficients also exhibit some of the notable properties of
canonical co... | 2309.08475v1 |
1995-02-09 | A linear thermohaline oscillator driven by stochastic atmospheric forcing | The interdecadal variability of a stochastically forced four-box model of the
oceanic meridional thermohaline circulation (THC) is described and compared to
the THC variability in the coupled ocean-atmosphere GCM of Delworth, Manabe,
and Stouffer (1993). The box model is placed in a linearly stable thermally
dominant m... | 9502002v2 |
1993-09-30 | The metal systems in Q0000--2619 at high resolution | We have obtained high, 11 and 14 \kms, and medium, 40 and 53 \kms, resolution
spectra of the $z_{em} = 4.11$ quasar Q0000--2619 covering the range 4400 \AA\
to 9265 \AA . We identify nine metal absorption systems, of which four were
previously known. A fifth previously suggested system at $z_{abs} \approx
3.409$ (Turns... | 9309053v1 |
1994-12-27 | The z=0.8596 Damped Lyman Alpha Absorbing Galaxy Toward PKS 0454+039 | We present {\it Hubble Space Telescope} and ground--based data on the
$z_{abs}=0.8596$ metal line absorption system along the line of sight to PKS
0454+0356. The system is a moderate redshift damped Lyman alpha system, with
${\rm N(HI)}=(5.7\pm0.3)\times10^{20}$~cm$^{-2}$ as measured from the {\it
Faint Object Spectrog... | 9412093v2 |
1995-05-17 | GRAVITATIONAL LENSING OF QUASARS BY THEIR DAMPED LYMAN-ALPHA ABSORBERS | Damped Lyman-alpha absorbers are believed to be associated with galactic
disks. We show that gravitational lensing can therefore affect the statistics
of these systems. First, the magnification bias due to lensing raises faint
QSOs above a given magnitude threshold and thereby enhances the probability for
observing dam... | 9505078v1 |
1996-08-22 | APM z>4 QSO Survey: Distribution and Evolution of High Column Density HI Absorbers | Eleven candidate damped Lya absorption systems were identified in 27 spectra
of the quasars from the APM z>4 survey covering the redshift range
2.8<z(abs)<4.4 (8 with z(abs)>3.5). High resolution echelle spectra (0.8A FWHM)
have been obtained for three quasars, including 2 of the highest redshift
objects in the survey.... | 9608146v1 |
1997-05-16 | Testing Cosmological Models Against the Abundance of Damped Lyman-Alpha Absorbers | We calculate the number of damped Lyman-alpha absorbers expected in various
popular cosmological models as a function of redshift and compare our
predictions with observed abundances. The Press-Schechter formalism is used to
obtain the distribution of halos with circular velocity in different
cosmologies, and we calibr... | 9705118v1 |
1997-05-28 | Zinc and Chromium Abundances in a Third Damped Lyman alpha System at Intermediate Redshift | We have determined the metallicity of the $z_{abs} = 1.0093$ damped Lyman
alpha system in the bright QSO EX 0302-223; this is only the third such
measurement at redshifts $z \simlt 1$. Unlike the previous two cases, we find
that the abundance of Zn is only a factor of $\sim 2$ lower than in the
Galactic interstellar me... | 9705222v1 |
1998-11-18 | The Closest Damped Lyman Alpha System | A difficulty of studying damped Lyman alpha systems is that they are distant,
so one knows little about the interstellar medium of the galaxy. Here we report
upon a damped Lyman alpha system in the nearby galaxy NGC 4203, which is so
close (v_helio = 1117 km/s) and bright (B_o = 11.62) that its HI disk has been
mapped.... | 9811274v1 |
1999-07-29 | Ionized Gas in Damped Lyman-alpha Systems and Its Effects on Elemental Abundance Studies | Recent high-resolution observations of metal absorption lines in
high-redshift damped Ly-alpha systems have shown that Al III, a tracer of
moderately-ionized gas, very often has a velocity structure indistinguishable
from that of low-ionization gas. Regions of ionized and neutral hydrogen in
these systems are likely co... | 9907428v1 |
1999-11-09 | Detection of Warm and Cold Phases of the Neutral ISM in a Damped Ly-alpha Absorber | We present a detailed study of the HI 21cm absorption system at z=0.0912
towards the radio quasar B0738+313. The uncommonly narrow main absorption line
and weak secondary line are resolved for the first time. In addition we find it
necessary to add a third, broader shallow component to obtain a good fit to the
spectrum... | 9911142v1 |
2000-06-01 | Crust-core coupling and r-mode damping in neutron stars: a toy model | R-modes in neutron stars with crusts are damped by viscous friction at the
crust-core boundary. The magnitude of this damping, evaluated by Bildsten and
Ushomirsky (BU) under the assumption of a perfectly rigid crust, sets the
maximum spin frequency for a neutron star spun up by accretion in a Low-Mass
X-ray binary (LM... | 0006028v1 |
2001-03-23 | First Investigation of the Clustering Environment of Damped Lyman Alpha Absorbers at z=4 | We report the first observations of the clustering environment of damped
Lyman alpha absorption systems at z=4. Color selection and photometric
redshifts were used to select 44 candidate Lyman-break galaxies brighter than
I_AB=25.5 from deep BRI images of the 35 sq. arcmin field containing the quasar
BR 0951-04. Multis... | 0103387v2 |
2002-11-11 | Damped Lyman alpha systems and galaxy formation models - II. High ions and Lyman limit systems | We investigate a model for the high-ionization state gas associated with
observed damped Lyman-alpha systems, based on a semi-analytic model of galaxy
formation set within the paradigm of hierarchical structure formation. In our
model, the hot gas in halos and sub-halos gives rise to CIV absorption, while
the low-ioniz... | 0211231v1 |
2003-05-16 | The Age-Metallicity Relation of the Universe in Neutral Gas: The First 100 Damped Lya Systems | We present accurate metallicity measurements for 121 damped Lya systems at
0.5<z<5 including ~50 new measurements from our recently published Echellette
Spectrograph and Imager surveys. This dataset is analysed to determine the
age-metallicity relation of neutral gas in the universe. Contrary to previous
datasets this ... | 0305314v1 |
2003-09-24 | WIMP matter power spectra and small scale power generation | Dark Matter (DM) is generally assumed to be massive, cold and collisionless
from the structure formation point of view. A more correct statement however is
that DM indeed experiences collisional damping, but on a scale which is
supposed to be too small to be relevant for structure formation. The aim of
this paper is to... | 0309652v1 |
2004-03-16 | The SDSS Damped Lya Survey: Data Release 1 | We present the results from an automated search for damped Lya (DLA) systems
in the quasar spectra of Data Release 1 from the Sloan Digital Sky Survey
(SDSS-DR1). At z~2.5, this homogeneous dataset has greater statistical
significance than the previous two decades of research. We derive a statistical
sample of 71 dampe... | 0403391v2 |
2006-06-28 | Neutral gas density in Damped Lyman Alpha systems | We estimate the intrinsic neutral gas density in Damped Lyman Alpha systems
($\Omega_{HI}^{(DLA)}$) in the redshift range $ 2.2 \lesssim z \lesssim 5$ from
the DLA SDSS DR_3 sample of optically selected quasars. We take into account
self-consistently the obscuration on background quasars due to the dust present
in Damp... | 0606693v1 |
2006-09-06 | Sun-as-a-star observations: evidence for degree dependence of changes in damping of low-l p modes along the solar cycle | We use 9.5-yr of BiSON Sun-as-a-star data to search for dependence of
solar-cycle parameter changes on the angular degree, l, of the data. The nature
of the Sun-as-a-star observations is such that for changes measured at fixed
frequency, or for changes averaged across the same range in frequency, any l
dependence prese... | 0609156v2 |
1997-08-12 | Coherence in the Quasi-Particle 'Scattering' by the Vortex Lattice in Pure Type-II Superconductors | The effect of quasi-particle (QP) 'scattering' by the vortex lattice on the
de-Haas van-Alphen oscillations in a pure type-II superconductor is
investigated within mean field,asymptotic perturbation theory. Using a 2D
electron gas model it is shown that, due to a strict phase coherence in the
many-particle correlation ... | 9708088v1 |
1999-08-27 | Electron Correlations in an Electron Bilayer at Finite Temperature: Landau Damping of the Acoustic Plasmon | We report angle-resolved Raman scattering observations of the temperature
dependent Landau damping of the acoustic plasmon in an electron bilayer system
realised in a GaAs double quantum well structure. Corresponding calculations of
the charge-density excitation spectrum of the electron bilayer using forms of
the rando... | 9908408v1 |
2000-10-02 | Comment on "Magnetic Breakdown at High Fields: Semiclassical and Quantum Treatments" | We comment on the study of the spin-damping factor on the de Haas-van Alphen
(dHvA) discussed by Han et al. (Phys. Rev. Lett. 85, 1500 (2000)). | 0010018v1 |
2002-03-11 | Shubnikov - de Haas effect in the quantum vortex liquid state of the organic superconductor $κ$-(BEDT-TTF)$_{2}$Cu(NCS)$_{2}$ | We report the Shubnikov-de Haas (SdH) oscillations observed in the vortex
liquid state of the quasi two dimensional organic superconductor
$\kappa$-(BEDT-TTF)$_{2}$Cu(NCS)$_{2}$. The SdH oscillations can be observed
down to about 5 T at 0.5 K, where the flux flow resistivity becomes as small as
about 30 % of the normal... | 0203228v2 |
2003-03-13 | Vibrational sidebands and dissipative tunneling in molecular transistors | Transport through molecular devices with strong coupling to a single
vibrational mode is considered in the case where the vibration is damped by
coupling to the environment. We focus on the weak tunneling limit, for which a
rate equation approach is valid. The role of the environment can be
characterized by a frictiona... | 0303236v3 |
2004-09-03 | Weyl equation for temperature fields induced by attosecond laser pulses | In this paper the Weyl equation for temperature field induced by laser beam
interaction with matter is proposed and solved. Depending on the scattering
mechanism the temperature field oscillate or is damped.
Key words: Thermal processes, Weyl equation | 0409076v1 |
2004-12-08 | Spectroscopy of a driven solid-state qubit coupled to a structured environment | We study the asymptotic dynamics of a driven spin-boson system where the
environment is formed by a broadened localized mode. Upon exploiting an exact
mapping, an equivalent formulation of the problem in terms of a quantum
two-state system (qubit) coupled to a harmonic oscillator which is itself
Ohmically damped, is fo... | 0412194v2 |
1995-03-08 | A NEW NUMERICAL APPROACH TO THE OSCILLATION MODES OF RELATIVISTIC STARS | The oscillation modes of a simple polytropic stellar model are studied. Using
a new numerical approach (based on integration for complex coordinates) to the
problem for the stellar exterior we have computed the eigenfrequencies of the
highly damped w-modes. The results obtained agree well with recent ones of
Leins, Nol... | 9503014v1 |
1998-01-29 | On the gravitational, dilatonic and axionic radiative damping of cosmic strings | We study the radiation reaction on cosmic strings due to the emission of
dilatonic, gravitational and axionic waves. After verifying the (on average)
conservative nature of the time-symmetric self-interactions, we concentrate on
the finite radiation damping force associated with the half-retarded minus
half-advanced ``... | 9801105v3 |
2004-10-15 | A Nonlinear Coupling Network to Simulate the Development of the r-mode Instablility in Neutron Stars II. Dynamics | Two mechanisms for nonlinear mode saturation of the r-mode in neutron stars
have been suggested: the parametric instability mechanism involving a small
number of modes and the formation of a nearly continuous Kolmogorov-type
cascade. Using a network of oscillators constructed from the eigenmodes of a
perfect fluid inco... | 0410072v1 |
1997-02-20 | Numerical study of plasmon properties in the SU(2)-Higgs model | Using the (effective) classical approximation, we compute numerically
time-dependent correlation functions in the SU(2)-Higgs model around the
electroweak phase transition, for $m_H \approx m_W$. The parameters of the
classical model have been determined previously by the dimensional reduction
relations for time-indepe... | 9702017v2 |
2001-01-16 | Nonlinear Landau damping of a plasmino in the quark-gluon plasma | On the basis of the Blaizot-Iancu equations, which are a local formulation of
the hard thermal loop (HTL) equations of motion for soft fluctuating quark and
gluon fields and their induced sources, the coupled kinetic equations for
plasminos and plasmons are obtained. The equality of matrix elements for
nonlinear scatte... | 0101167v2 |
2003-12-15 | Nonequilibrium pion dynamics near the critical point in a constituent quark model | We study static and dynamical critical phenomena of chiral symmetry breaking
in a two-flavor Nambu--Jona-Lasinio constituent quark model. We obtain the
low-energy effective action for scalar and pseudoscalar degrees of freedom to
lowest order in quark loops and to quadratic order in the meson fluctuations
around the me... | 0312185v2 |
2002-02-01 | Time Domain Computation of a Nonlinear Nonlocal Cochlear Model with Applications to Multitone Interaction in Hearing | A nonlinear nonlocal cochlear model of the transmission line type is studied
in order to capture the multitone interactions and resulting tonal suppression
effects. The model can serve as a module for voice signal processing, it is a
one dimensional (in space) damped dispersive nonlinear PDE based on mechanics
and phen... | 0202004v3 |
2003-12-22 | Intermittency is a consequence of turbulent transport in nonlinear systems | Intermittent high-amplitude structures emerge in a damped and driven discrete
nonlinear Schroedinger equation whose solutions transport both energy and
particles from sources to sinks. These coherent structures are necessary for
any solution that has statistically stationary transport properties. | 0312059v1 |
2004-06-17 | Multi-frequency control of Faraday wave patterns | We show how pattern formation in Faraday waves may be manipulated by varying
the harmonic content of the periodic forcing function. Our approach relies on
the crucial influence of resonant triad interactions coupling pairs of critical
standing wave modes with damped, spatio-temporally resonant modes. Under the
assumpti... | 0406034v1 |
1997-01-22 | Shell Model for Warm Rotating Nuclei | In order to provide a microscopic description of levels and E2 transitions in
rapidly rotating nuclei with internal excitation energy up to a few MeV, use is
made of a shell model which combines the cranked Nilsson mean-field and the
residual surface delta two-body force. The damping of collective rotational
motion is ... | 9701044v1 |
2005-04-21 | Enhanced optical cooling of particle beams in storage rings | The problem of enhanced optical cooling (EOC) of particle beams in storage
rings beyond the Robinson's damping criterion is discussed. | 0504145v1 |
2005-10-21 | Non-contact atomic force microscopy: Stability criterion and dynamical responses of the shift of frequency and damping signal | The aim of this article is to provide a complete analysis of the behavior of
a noncontact atomic force microscope (NC-AFM). We start with a review of the
equations of motion of a tip interacting with a surface in which the stability
conditions are first revisited for tapping mode. Adding the equations of
automatic gain... | 0510192v1 |
1999-06-09 | Quantum dynamics of a damped deformed oscillator | The interaction of a quantum deformed oscillator with the environment is
studied deriving a master equation whose form strongly depends on the type of
deformation. | 9906031v1 |
2007-04-29 | Long Term Evolution of Magnetic Turbulence in Relativistic Collisionless Shocks: Electron-Positron Plasmas | We study the long term evolution of magnetic fields generated by a
collisionless relativistic $e^+e^-$ shock which is initially unmagnetized. Our
2D particle-in-cell numerical simulations show that downstream of such a
Weibel-mediated shock, particle distributions are close to isotropic,
relativistic Maxwellians, and t... | 0704.3832v2 |
2007-06-21 | Production of a sterile species via active-sterile mixing: an exactly solvable model | The production of a sterile species via active-sterile mixing in a thermal
medium is studied in an exactly solvable model. The \emph{exact} time evolution
of the sterile distribution function is determined by the dispersion relations
and damping rates $\Gamma_{1,2}$ for the quasiparticle modes. These depend on
$\wtg = ... | 0706.3167v2 |
2007-08-02 | Eccentricity evolution of giant planet orbits due to circumstellar disk torques | The extrasolar planets discovered to date possess unexpected orbital
elements. Most orbit their host stars with larger eccentricities and smaller
semi-major axes than similarly sized planets in our own solar system do. It is
generally agreed that the interaction between giant planets and circumstellar
disks (Type II mi... | 0708.0335v1 |
2007-10-10 | HE 0515-4414 - an unusual sub-damped Ly alpha system revisited | Using STIS and VLT UVES observations we have examined the ionization,
abundances, and differential dust depletion of metals, the kinematic structure,
and the physical conditions in the molecular hydrogen-bearing sub-damped Ly
alpha system toward HE 0515-4414 at z = 1.15. The velocity interval of
associated metal lines ... | 0710.3560v1 |
2008-06-05 | Viscous damping of r-mode oscillations in compact stars with quark matter | We determine characteristic timescales for the viscous damping of r-mode
oscillations in rapidly rotating compact stars that contain quark matter. We
present results for the color-flavor-locked (CFL) phase of dense quark matter,
in which the up, down and strange quarks are gapped, as well as the normal
(ungapped) quark... | 0806.1005v2 |
2008-06-09 | Relaxation Time and Relaxation Function of Quark-Gluon Plasma with Lattice QCD | We propose a method which enables a QCD-based calculation of a relaxation
time for a dissipative current in the causal and dissipative hydrodynamic
equation derived by Israel and Stewart. We point out that the Israel-Stewart
equation is not unique as a causal and dissipative hydrodynamic equation, and
the form of the c... | 0806.1481v1 |
2008-06-18 | Imaging method for interface rheological characterization | The present work investigates free damped oscillations of an oil drop in
water after its release from a capillary tube. Both pure heptane drops and
diluted crude oil drops are considered (in the second case the interface is
covered by amphiphilic species, natural components of crude oil). Shadowgraph
images of the drop... | 0806.3030v1 |
2008-06-27 | Klein - Gordon equation for market wealth operations | In this paper the modified Klein - Gordon equation for market processes is
proposed and solved. It is argued that the oscillations in market propagate
with the light velocity. The initial pulse in the market is damped and for very
large time diffused according to the Fourier law. | 0806.4466v1 |
2008-10-22 | Mean Motion Resonances in Extrasolar Planetary Systems with Turbulence, Interactions, and Damping | This paper continues previous work on the effects of turbulence on mean
motion resonances in extrasolar planetary systems. Turbulence is expected to
arise in the disks that form planets, and these fluctuations act to compromise
resonant configurations. This paper extends previous work by considering how
interactions be... | 0810.4076v1 |
2009-01-11 | On the derivation of structural models with general thermomechanical prestress | The vibrating behaviour of thin structures is affected by prestress states.
Hence, the effects of thermal prestress are important research subjects in view
of ambient vibration monitoring of civil structures. The interaction between
prestress, geometrically non-linear behaviour, as well as damping and its
coupling with... | 0901.1446v1 |
2009-04-17 | On Landau damping | Going beyond the linearized study has been a longstanding problem in the
theory of Landau damping. In this paper we establish exponential Landau damping
in analytic regularity. The damping phenomenon is reinterpreted in terms of
transfer of regularity between kinetic and spatial variables, rather than
exchanges of ener... | 0904.2760v5 |
2009-07-27 | Parameter exploration of optically trapped liquid aerosols | When studying the motion of optically trapped particles on the $\mu s$ time
scale, in low viscous media such as air, inertia cannot be neglected.
Resolution of unusual and interesting behaviour not seen in colloidal trapping
experiments is possible. In attempt to explain the phenomena we use power
spectral methods to p... | 0907.4582v2 |
2010-06-19 | On the saturation amplitude of the f-mode instability | We investigate strong nonlinear damping effects which occur during high
amplitude oscillations of neutron stars, and the gravitational waves they
produce. For this, we use a general relativistic nonlinear hydrodynamics code
in conjunction with a fixed spacetime (Cowling approximation) and a polytropic
equation of state... | 1006.3885v2 |
2010-07-06 | Magneto-elastic oscillations and the damping of crustal shear modes in magnetars | In a realistic model of magneto-elastic oscillations in magnetars, we find
that crustal shear oscillations, often invoked as an explanation of
quasi-periodic oscillations (QPOs) seen after giant flares in soft gamma-ray
repeaters (SGRs), are damped by resonant absorption on timescales of at most
0.2s, for a lower limit... | 1007.0856v2 |
2010-08-16 | Orbital evolution of eccentric planets in radiative discs | With an average eccentricity of about 0.29, the eccentricity distribution of
extrasolar planets is markedly different from the solar system. Among other
scenarios considered, it has been proposed that eccentricity may grow through
planet-disc interaction. Recently, it has been noticed that the thermodynamical
state of ... | 1008.2656v1 |
2010-11-02 | A Carbon-enhanced Metal-poor Damped Lyman alpha System: Probing Gas from Population III Nucleosynthesis? | We present high resolution observations of an extremely metal-poor damped
Lyman-alpha system, at z_abs = 2.3400972 in the spectrum of the QSO J0035-0918,
exhibiting an abundance pattern consistent with model predictions for the
supernova yields of Population III stars. Specifically, this DLA has [Fe/H] =
-3.04, shows a... | 1011.0733v2 |
2010-11-08 | Exponential stabilization without geometric control | We present examples of exponential stabilization for the damped wave equation
on a compact manifold in situations where the geometric control condition is
not satisfied. This follows from a dynamical argument involving a topological
pressure on a suitable uncontrolled set. | 1011.1699v1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.