publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2012-07-22 | Singularity and existence to a wave system of nematic liquid crystals | In this paper, we prove the global existence and singularity formation for a
wave system from modelling nematic liquid crystals in one space dimension. In
our model, although the viscous damping term is included, the solution with
smooth initial data still has gradient blowup in general, even when the initial
energy is... | 1207.5190v1 |
2012-07-26 | Upsilon Suppression in PbPb Collisions at sqrt(s_NN) = 2.76 TeV | We suggest that the combined effect of screening, gluon-induced dissociation,
collisional damping, and reduced feed-down explains most of the sequential
suppression of Y(nS) states that has been observed in PbPb relative to pp
collisions at sqrt(s_NN) = 2.76 TeV. The suppression is thus a clear, albeit
indirect, indica... | 1207.6227v1 |
2012-09-08 | Local energy decay for the wave equation with nonlinear time dependent damping | This paper addresses a wave equation on a exterior domain in R^{d}(d odd)
with nonlinear time dependent dissipation. Under a microlocal geometric
condition we prove that the decay rates of the local energy functional are
obtained by solving a nonlinear non-autonomous differential equation. | 1209.1733v1 |
2012-09-08 | Evidence for anisotropic polar nanoregions in relaxor PMN: A neutron study of the elastic constants and anomalous TA phonon damping | We use neutron scattering to characterize the acoustic phonons in the relaxor
PMN and demonstrate the presence of an anisotropic damping mechanism directly
related to short-range, polar correlations. For a large range of temperatures
above Tc ~ 210, K, where dynamic polar correlations exist, acoustic phonons
propagatin... | 1209.1736v1 |
2012-12-28 | Turbulence-Induced Instabilities in EP and QGP | Polarization properties of turbulent stochastically inhomogeneous
ultrarelativistic QED plasma are studied. It is shown that the sign of
nonlinear turbulent Landau damping corresponds to an instability of the
spacelike modes and, for sufficiently large turbulent fields, to an actual
instability of a system. | 1212.6555v1 |
2013-02-26 | Spin Mixing in Spinor Fermi Gases | We study a spinor fermionic system under the effect of spin-exchange
interaction. We focus on the interplay between the spin-exchange interaction
and the effective quadratic Zeeman shift. We examine the static and the dynamic
properties of both two- and many-body system. We find that the spin-exchange
interaction induc... | 1302.6549v1 |
2013-03-12 | Damped jump-telegraph processes | We study a one-dimensional Markov modulated random walk with jumps. It is
assumed that amplitudes of jumps as well as a chosen velocity regime are random
and depend on a time spent by the process at a previous state of the underlying
Markov process.
Equations for the distribution and equations for its moments are der... | 1303.2796v1 |
2013-03-14 | Drag and Diffusion coefficients in extreme scenarios of temperature and chemical potential | A comparative study of high and zero temperature plasma for the case of
damping rate, drag and diffusion coefficients have been presented. In each of
these quantities, it is revealed how the magnetic interaction dominates over
the electric one at zero temperature unlike what happens at high temperature. | 1303.3353v1 |
2013-05-19 | On Collective Properties of Turbulent QED Plasma | Polarization properties of turbulent stochastically inhomogeneous
ultrarelativistic QED plasma are studied. It is shown that the sign of
nonlinear turbulent Landau damping corresponds to an instability of the
spacelike modes and, for sufficiently large turbulent fields, to an actual
instability of a system. Modificatio... | 1305.4414v1 |
2013-06-17 | Uniformly polynomially stable approximations for a class of second order evolution equations | In this paper we study time semi-discrete approximations of a class of
polynomially stable infinite dimensional systems modeling the damped
vibrations. We prove that adding a suitable numerical viscosity term in the
numerical scheme, one obtains approximations that are uniformly polynomially
stable with respect to the ... | 1306.3807v1 |
2013-08-21 | Overstable Librations can account for the Paucity of Mean Motion Resonances among Exoplanet Pairs | We assess the multi-planet systems discovered by the Kepler satellite in
terms of current ideas about orbital migration and eccentricity damping due to
planet-disk interactions. Our primary focus is on mean motion resonances. Only
a few percent of planet pairs are in close proximity to a resonance. However,
predicted m... | 1308.4688v2 |
2013-08-30 | Nested Head-Tail Vlasov Solver | Nested Head-Tail (NHT) is a Mathematica-based Vlasov solver for transverse
oscillations in multi-bunch beams. It takes into account azimuthal, radial,
coupled-bunch and beam-beam degrees of freedom, single- and inter-bunch dipole
wakes, an arbitrary damper, beam-beam effects and Landau damping. | 1309.0044v3 |
2013-09-24 | Attractors for damped quintic wave equations in bounded domains | The dissipative wave equation with a critical quintic nonlinearity in smooth
bounded three dimensional domain is considered. Based on the recent extension
of the Strichartz estimates to the case of bounded domains, the existence of a
compact global attractor for the solution semigroup of this equation is
established. M... | 1309.6272v1 |
2013-09-30 | Harmonic oscillator: an analysis via Fourier series | The Fourier series method is used to solve the homogeneous equation governing
the motion of the harmonic oscillator. It is shown that the general solution to
the problem can be found in a surprisingly simple way for the case of the
simple harmonic oscillator. It is also shown that the damped harmonic
oscillator is susc... | 1309.7918v1 |
2013-10-01 | Observations and predictions at CesrTA, and outlook for ILC | In this paper, we will describe some of the recent experimental measurements
[1, 2, 3] performed at CESRTA [4], and the supporting simulations, which probe
the interaction of the electron cloud with the stored beam. These experiments
have been done over a wide range of beam energies, emittances, bunch currents,
and fil... | 1310.0261v1 |
2013-10-21 | A Critical History of Renormalization | The history of renormalization is reviewed with a critical eye, starting with
Lorentz's theory of radiation damping, through perturbative QED with Dyson,
Gell-Mann & Low, and others, to Wilson's formulation and Polchinski's
functional equation, and applications to "triviality", and dark energy in
cosmology. | 1310.5533v1 |
2013-10-27 | Fundamental limitations of half-metallicicity in spintronic materials | Zero-point spin fluctuations are shown to strongly influence the ground state
of ferromagnetic metals and to impose limitations for the fully spin polarized
state assumed in half-metallic ferromagnets, which may influence their
applications in spintronics. This phenomenon leads to the low-frequency Stoner
excitations a... | 1310.7174v1 |
2013-12-13 | Probing Intergalactic Neutral Hydrogen by the Lyman Alpha Red Damping Wing of Gamma-Ray Burst 130606A Afterglow Spectrum at z = 5.913 | The unprecedentedly bright optical afterglow of GRB 130606A located by Swift
at a redshift close to the reionization era (z = 5.913) provides a new
opportunity to probe the ionization status of intergalactic medium (IGM). Here
we present an analysis of the red Ly alpha damping wing of the afterglow
spectrum taken by Su... | 1312.3934v3 |
2014-02-01 | Effects of stellar flybys on planetary systems: 3D modeling of the circumstellar disks damping effects | Stellar flybys in star clusters are suspected to affect the orbital
architecture of planetary systems causing eccentricity excitation and orbital
misalignment between the planet orbit and the equatorial plane of the star. We
explore whether the impulsive changes in the orbital elements of planets,
caused by an hyperbol... | 1402.0077v1 |
2014-02-21 | Damping of electron Zitterbewegung in carbon nanotubes | Zitterbewegung (ZB, trembling motion) of electrons in semiconductor carbon
nanotubes is described taking into account dephasing processes. The density
matrix formalism is used for the theory. Differences between decay of ZB
oscillations due to electron localization and that due to dephasing are
discussed. | 1402.5393v1 |
2014-04-18 | Exponential mixing for the white - forced damped nonlinear wave equation | The paper is devoted to studying the stochastic nonlinear wave (NLW) equation
in a bounded domain D $\subset$ R3. We show that the Markov process associated
with the flow of solution has a unique stationary measure $\mu$, and the law of
any solution converges to $\mu$ with exponential rate in the dual-Lipschitz
norm | 1404.4697v1 |
2014-04-22 | A unique continuation result for the plate equation and an application | In this paper, we prove the unique continuation property for the weak
solution of the plate equation with non-smooth coefficients. Then, we apply
this result to study the global attractor for the semilinear plate equation
with a localized damping. | 1404.5586v3 |
2014-05-13 | Magneto-seismological insights into the penumbral chromosphere and evidence for wave damping in spicules | The observation of propagating magneto-hydrodynamic kink waves in magnetic
structures and measurement of their properties (amplitude, phase speed) can be
used to diagnose the plasma conditions in the neighbourhood of the magnetic
structure via magneto-seismology (MS). We aim to reveal properties of the
chromosphere/Tra... | 1405.3203v1 |
2014-05-27 | Interior feedback stabilization of wave equations with dynamic boundary delay | In this paper we consider an interior stabilization problem for the wave
equation with dynamic boundary delay.We prove some stability results under the
choice of damping operator. The proof of the main result is based on a
frequency domain method and combines a contradiction argument with the
multiplier technique to ca... | 1405.6865v2 |
2014-07-11 | Remark on stabilization of second order evolution equations by unbounded dynamic feedbacks and applications | In this paper we consider second order evolution equations with unbounded
dynamic feedbacks. Under a regularity assumption we show that observability
properties for the undamped problem imply decay estimates for the damped
problem. We consider both uniform and non uniform decay properties. | 1407.3070v1 |
2014-09-11 | Eliminating flutter for clamped von Karman plates immersed in subsonic flows | We address the long-time behavior of a non-rotational von Karman plate in an
inviscid potential flow. The model arises in aeroelasticity and models the
interaction between a thin, nonlinear panel and a flow of gas in which it is
immersed [6, 21, 23]. Recent results in [16, 18] show that the plate component
of the dynam... | 1409.3308v5 |
2014-12-15 | Optomechanical laser cooling with mechanical modulations | We theoretically study the laser cooling of cavity optomechanics when the
mechanical resonance frequency and damping depend on time. In the regime of
weak optomechanical coupling we extend the theory of laser cooling using an
adiabatic approximation. We discuss the modifications of the cooling dynamics
and compare it w... | 1412.4497v1 |
2015-03-08 | An Analytical Formulation of Power System Oscillation Frequency | This letter proposes an analytical approach to formulate the power system
oscillation frequency under a large disturbance. A fact is revealed that the
oscillation frequency is only the function of the oscillation amplitude when
the system's model and operating condition are fixed. Case studies also show
that this funct... | 1503.07554v1 |
2015-04-07 | Generation of coherent spin-wave modes in Yttrium Iron Garnet microdiscs by spin-orbit torque | Spin-orbit effects [1-4] have the potential of radically changing the field
of spintronics by allowing transfer of spin angular momentum to a whole new
class of materials. In a seminal letter to Nature [5], Kajiwara et al. showed
that by depositing Platinum (Pt, a normal metal) on top of a 1.3 $\mu$m thick
Yttrium Iron... | 1504.01512v1 |
2015-05-01 | Periodic solutions for nonlinear hyperbolic evolution systems | We shall deal with the periodic problem for nonlinear perturbations of
abstract hyperbolic evolution equations generating an evolution system of
contractions. We prove an averaging principle for the translation along
trajectories operator associated to the nonlinear evolution system, expressed
in terms of the topologic... | 1505.00150v1 |
2015-05-28 | Moore-Gibson-Thompson equation with memory, part I: exponential decay of energy | We are interested in the Moore-Gibson-Thompson(MGT) equation with memory
\begin{equation}\nonumber \tau u_{ttt}+ \alpha u_{tt}+c^2\A u+b\A u_t
-\int_0^tg(t-s)\A w(s)ds=0. \end{equation} We first classify the memory into
three types. Then we study how a memory term creates damping mechanism and how
the memory causes ene... | 1505.07523v1 |
2015-05-29 | Fission barriers heights in A$\sim$ 200 mass region | Statistical model analysis has been carried out for $p$ and $\alpha$ induced
fission reactions using a consistent description for fission barrier and level
density in A $\sim$ 200 mass region. A continuous damping of shell correction
with excitation energy have been considered. Extracted fission barriers agree
well wit... | 1505.08026v1 |
2015-06-16 | Revisit on How to Derive Asymptotic Profiles to Some Evolution Equations | We consider the Cauchy problem in ${\bf R}^{n}$ for heat and damped wave
equations. We derive asymptotic profiles to those solutions with weighted
$L^{1,1}({\bf R}^{n})$ data by presenting a simple method. | 1506.04858v1 |
2015-06-21 | Predicting the Influence of Plate Geometry on the Eddy Current Pendulum | We quantitatively analyze a familiar classroom demonstration, Van
Waltenhofen's eddy current pendulum, to predict the damping effect for a
variety of plate geometries from first principles. Results from conformal
mapping, finite element simulations and a simplified model suitable for
introductory classes are compared w... | 1506.06401v1 |
2015-07-19 | Alfvén wave phase-mixing in flows: Why over-dense, solar coronal, open magnetic field structures are cool? | The motivation for this study is to include the effect of plasma flow in
Alfv\'en wave (AW) damping via phase mixing and to explore the observational
implications. Our magnetohydrodynamic (MHD) simulations and analytical
calculations show that, when a background flow is present, mathematical
expressions for the AW damp... | 1507.05293v2 |
2015-09-28 | Linear inviscid damping for a class of monotone shear flow in Sobolev spaces | In this paper, we prove the decay estimates of the velocity and $H^1$
scattering for the 2D linearized Euler equations around a class of monotone
shear flow in a finite channel. Our result is consistent with the decay rate
predicted by Case in 1960. | 1509.08228v1 |
2015-10-09 | Energy Dissipation and Landau Damping in Two- and Three-Dimensional Plasma Turbulence | Plasma turbulence is ubiquitous in space and astrophysical plasmas, playing
an important role in plasma energization, but the physical mechanisms leading
to dissipation of the turbulent energy remain to be definitively identified.
Kinetic simulations in two dimensions (2D) have been extensively used to study
the dissip... | 1510.02842v2 |
2015-10-10 | Boundary layers and incompressible Navier-Stokes-Fourier limit of the Boltzmann Equation in Bounded Domain (I) | We establish the incompressible Navier-Stokes-Fourier limit for solutions to
the Boltzmann equation with a general cut-off collision kernel in a bounded
domain. Appropriately scaled families of DiPerna-Lions-(Mischler) renormalized
solutions with Maxwell reflection boundary conditions are shown to have
fluctuations tha... | 1510.02977v1 |
2015-11-12 | Global weak solutions to 3D compressible Navier-Stokes-Poisson equations with density-dependent viscosity | Global-in-time weak solutions to the Compressible Navier-Stokes-Poisson
equations in a three-dimensional torus for large data are considered in this
paper. The system takes into account density-dependent viscosity and
non-monotone presseur. We prove the existence of global weak solutions to NSP
equations with damping t... | 1511.03841v1 |
2015-11-18 | Temperature cooling in quantum dissipation channel and the correspondimg thermal vacuum state | We examine temperature cooling of optical chaotic light in a quantum
dissipation channel with the damping parameter k.The way we do it is by
introducing its thermal vacuum state which can expose entangling effect between
the system and the reservoir. The temperature cooling formula is derived, which
depends on the para... | 1511.05777v1 |
2015-12-03 | Lieb-Thirring inequalities on the torus | We consider the Lieb-Thirring inequalities on the d-dimensional torus with
arbitrary periods. In the space of functions with zero average with respect to
the shortest coordinate we prove the Lieb-Thirring inequalities for the
$\gamma$-moments of the negative eigenvalues with constants independent of
ratio of the period... | 1512.01160v1 |
2016-01-30 | Quantum Dynamics of Complex Hamiltonians | Non hermitian Hamiltonians play an important role in the study of dissipative
quantum systems. We show that using states with time dependent normalization
can simplify the description of such systems especially in the context of the
classical limit. We apply this prescription to study the damped harmonic
oscillator sys... | 1602.00157v2 |
2016-02-17 | Instability of a witness bunch in a plasma bubble | The stability of a trailing witness bunch, accelerated by a plasma wake
accelerator (PWA) in a blow-out regime, is discussed. The instability growth
rate as well as the energy spread, required for BNS damping, are obtained. A
relationship between the PWA power efficiency and the BNS energy spread is
derived. | 1602.05260v2 |
2016-02-25 | Strong Ly alpha Emission in the Proximate Damped Ly alpha Absorption Trough toward the Quasar SDSS J095253.83+011422.0 | SDSS J095253.83+011422.0 (SDSS J0952+0114) was reported by Hall et al. (2004)
as an exotic quasar at $z_{\rm em}=3.020$. In contrast to prominent broad
metal--line emissions with FWHM~9000 km/s, only a narrow Ly \alpha emission
line is present with FWHM~1000 km/s. The absence of broad Ly alpha emission
line has been a ... | 1602.07880v2 |
2016-03-27 | Evolution of One-Dimensional Wind-Driven Sea Spectra | We analyze modern operational models of wind wave prediction on the subject
for compliance dissipation. Our numerical simulations from the "first
principle" demonstrate that heuristic formulas for damping rate of free wind
sea due to "white capping" (or wave breaking) dramatically exaggerates the role
of this effect in... | 1603.08229v1 |
2016-03-07 | Faddeev-Jackiw Quantization of Non-Autonomous Singular Systems | We extend the quantization \`a la Faddeev-Jackiw for non-autonomous singular
systems. This leads to a generalization of the Schr\"odinger equation for those
systems. The method is exemplified by the quantization of the damped harmonic
oscillator and the relativistic particle in an external electromagnetic field. | 1603.08407v1 |
2016-05-06 | Existence of invariant measures for the stochastic damped Schrödinger equation | In this paper, we address the long time behaviour of solutions of the
stochastic Schrodinger equation in $\mathbb{R}^d$. We prove the existence of an
invariant measure and establish asymptotic compactness of solutions, implying
in particular the existence of an ergodic measure. | 1605.02014v1 |
2016-05-25 | Dynamic analysis of simultaneous adaptation of force, impedance and trajectory | When carrying out tasks in contact with the environment, humans are found to
concurrently adapt force, impedance and trajectory. Here we develop a robotic
model of this mechanism in humans and analyse the underlying dynamics. We
derive a general adaptive controller for the interaction of a robot with an
environment sol... | 1605.07834v1 |
2016-06-24 | Mixing for the Burgers equation driven by a localised two-dimensional stochastic forcing | We consider the one-dimensional Burgers equation perturbed by a stochastic
forcing, which is assumed to be white in time and localised and low-dimensional
in space. We establish a mixing property for the Markov process associated with
the problem in question. The proof is based on a general criterion for mixing
and a r... | 1606.07763v1 |
2016-07-01 | Randomized block proximal damped Newton method for composite self-concordant minimization | In this paper we consider the composite self-concordant (CSC) minimization
problem, which minimizes the sum of a self-concordant function $f$ and a
(possibly nonsmooth) proper closed convex function $g$. The CSC minimization is
the cornerstone of the path-following interior point methods for solving a
broad class of co... | 1607.00101v1 |
2016-11-09 | Witnessing quantum capacities of correlated channels | We test a general method to detect lower bounds of the quantum channel
capacity for two-qubit correlated channels. We consider in particular
correlated dephasing, depolarising and amplitude damping channels. We show that
the method is easily implementable, it does not require a priori knowledge
about the channels, and ... | 1611.02857v1 |
2017-03-20 | Recovery of the starting times of delayed signals | We present a new method to locate the starting points in time of an arbitrary
number of (damped) delayed signals. For a finite data sequence, the method
permits to first locate the starting point of the component with the longest
delay, and then --by iteration-- all the preceding ones. Numerical examples are
given and ... | 1703.07001v1 |
2017-05-13 | Eigenvalues of one-dimensional non-self-adjoint Dirac operators and applications | We analyze eigenvalues emerging from thresholds of the essential spectrum of
one-dimensional Dirac operators perturbed by complex and non-symmetric
potentials. In the general non-self-adjoint setting we establish the existence
and asymptotics of weakly coupled eigenvalues and Lieb-Thirring inequalities.
As physical app... | 1705.04833v1 |
2017-09-07 | The driven oscillator, with friction | This paper develops further the semi-classical theory of an harmonic
oscillator acted on by a Gaussian white noise force discussed in
(arXiv:1508.02379). Here I add to that theory the effects of Brownian damping
(friction). Albeit semi-classical, the theory can be used to model quantum
expectations and probabilities. I... | 1709.03391v1 |
2017-09-24 | Exceptional points in two simple textbook examples | We propose to introduce the concept of exceptional points in intermediate
courses on mathematics and classical mechanics by means of simple textbook
examples. The first one is an ordinary second-order differential equation with
constant coefficients. The second one is the well known damped harmonic
oscillator. They ena... | 1710.00067v1 |
2017-11-16 | Correlations in the three-dimensional Lyman-alpha forest contaminated by high column density absorbers | Correlations measured in three dimensions in the Lyman-alpha forest are
contaminated by the presence of the damping wings of high column density (HCD)
absorbing systems of neutral hydrogen (HI; having column densities
$N(\mathrm{HI}) > 1.6\times10^{17}\,\mathrm{atoms}\,\mathrm{cm}^{-2}$), which
extend significantly bey... | 1711.06275v2 |
2017-12-05 | Harnessing Electrical Power from Vortex-Induced Vibration of a Circular Cylinder | The generation of electrical power from Vortex-Induced Vibration (VIV) of a
cylinder is investigated numerically. The cylinder is free to oscillate in the
direction transverse to the incoming flow. The cylinder is attached to a magnet
that can move along the axis of a coil made from conducting wire. The magnet
and the ... | 1712.01588v1 |
2017-12-08 | An algorithm to resolve γ-rays from charged cosmic rays with DAMPE | The DArk Matter Particle Explorer (DAMPE), also known as Wukong in China,
launched on December 17, 2015, is a new high energy cosmic ray and {\gamma}-ray
satellite-borne observatory in space. One of the main scientific goals of DAMPE
is to observe GeV-TeV high energy {\gamma}-rays with accurate energy, angular,
and tim... | 1712.02939v1 |
2017-12-27 | A simple and natural interpretations of the DAMPE cosmic-ray electron/positron spectrum within two sigma deviations | The DArk Matter Particle Explorer (DAMPE) experiment has recently announced
the first results for the measurement of total electron plus positron fluxes
between 25 GeV and 4.6 TeV. A spectral break at about 0.9 TeV and a tentative
peak excess around 1.4 TeV have been found. However, it is very difficult to
reproduce bo... | 1712.09586v6 |
2018-03-21 | Well-posedness and stabilization of the Benjamin-Bona-Mahony equation on star-shaped networks | We study the stabilization issue of the Benjamin-Bona-Mahony (BBM) equation
on a finite star-shaped network with a damping term acting on the central node.
In a first time, we prove the well-posedness of this system. Then thanks to the
frequency domain method, we get the asymptotic stabilization result. | 1803.07914v1 |
2018-04-05 | Finite time blow up for wave equations with strong damping in an exterior domain | We consider the initial boundary value problem in exterior domain for
semilinear wave equations with power-type nonlinearity |u| p. We will establish
blow-up results when p is less than or equal to Strauss' exponent which is the
same one for the whole space case R n . | 1804.01689v1 |
2018-04-13 | Well-posedness and long time behavior of singular Langevin stochastic differential equations | In this paper, we study damped Langevin stochastic differential equations
with singular velocity fields. We prove the strong well-posedness of such
equations. Moreover, by combining the technique of Lyapunov functions with
Krylov's estimate, we also establish the exponential ergodicity for the unique
strong solution. | 1804.05086v2 |
2018-04-27 | Contribution of phase-mixing of Alfvén waves to coronal heating in multi-harmonic loop oscillations | Kink oscillations of a coronal loop are observed and studied in detail
because they provide a unique probe into the structure of coronal loops through
MHD seismology and a potential test of coronal heating through the phase-mixing
of Alfv\'en waves. In particular, recent observations show that standing
oscillations of ... | 1804.10562v1 |
2018-05-23 | Effect of time varying transmission rates on coupled dynamics of epidemic and awareness over multiplex network | In the present work, a non-linear stochastic model is presented to study the
effect of time variation of transmission rates on the co-evolution of epidemics
and its corresponding awareness over a two layered multiplex network. In this
model, the infection transmission rate of a given node in the epidemic layer
depends ... | 1805.08947v2 |
2018-06-09 | Recovery Analysis of Damped Spectrally Sparse Signals and Its Relation to MUSIC | One of the classical approaches for estimating the frequencies and damping
factors in a spectrally sparse signal is the MUSIC algorithm, which exploits
the low-rank structure of an autocorrelation matrix. Low-rank matrices have
also received considerable attention recently in the context of optimization
algorithms with... | 1806.03511v5 |
2018-07-13 | N-body simulations of structure formation in thermal inflation cosmologies | Thermal inflation models (which feature two inflationary stages) can display
damped primordial curvature power spectra on small scales which generate damped
matter fluctuations. For a reasonable choice of parameters, thermal inflation
models naturally predict a suppression of the matter power spectrum on galactic
and s... | 1807.04980v2 |
2018-07-16 | Global existence for semilinear damped wave equations in relation with the Strauss conjecture | We study the global existence of solutions to semilinear wave equations with
power-type nonlinearity and general lower order terms on $n$ dimensional
nontrapping asymptotically Euclidean manifolds, when $n=3, 4$. In addition, we
prove almost global existence with sharp lower bound of the lifespan for the
four dimension... | 1807.05908v1 |
2018-07-20 | Effect of correlated noise channels on quantum speed limit | We study the effect of correlated Markovian noise channels on the quantum
speed limit of an open system. This is done for correlated dephasing and
amplitude damping channels for a two qubit atomic model. Our model serves as a
platform for a detailed study of speed of quantum evolution in correlated open
systems. | 1807.07782v2 |
2018-08-20 | Local existence of Strong solutions for a fluid-structure interaction model | We are interested in studying a system coupling the compressible
Navier-Stokes equations with an elastic structure located at the boundary of
the fluid domain. Initially the fluid domain is rectangular and the beam is
located on the upper side of the rectangle. The elastic structure is modeled by
an Euler-Bernoulli dam... | 1808.06716v1 |
2018-09-04 | Creation of bipartite steering correlations by a fast damped auxiliary mode | We consider a three-mode system and show how steering correlations can be
created between two modes of the system using the fast dissipation of the third
mode. These correlations result in a directional form of entanglement, called
quantum or EPR steering. We illustrate this on examples of the interactions
among damped... | 1809.01176v1 |
2018-10-06 | Global Well-Posedness and Global Attractor for Two-dimensional Zakharov-Kuznetsov Equation | The initial value problem for two-dimensional Zakharov-Kuznetsov equation is
shown to be globally well-posed in $H^s({\mathbb{R}^2})$ for all
$\frac{5}{7}<s<1$ via using $I$-method in the context of atomic spaces. By
means of the increment of modified energy, the exsitence of global attractor
for weakly damped, forced ... | 1810.02984v1 |
2018-10-07 | Uniform attractors for measure-driven quintic wave equation with periodic boundary conditions | We give a detailed study of attractors for measure driven quintic damped wave
equations with periodic boundary conditions. This includes uniform
energy-to-Strichartz estimates, the existence of uniform attractors in a weak
or strong topology in the energy phase space, the possibility to present them
as a union of all c... | 1810.03149v1 |
2018-10-13 | Exponential Decay in a Timoshenko-type System of Thermoelasticity of Type III with Frictional versus Viscoelatic Damping and Delay | In this work, a Timoshenko system of type III of thermoelasticity with
frictional versus viscoelastic under Dirichlet-Dirichlet-Neumann boundary
conditions was considered. By exploiting energy method to produce a suitable
Lyapunov functional, we establish the global existence, exponential decay of
Type-III case. | 1810.05820v1 |
2018-12-22 | Damping of acoustic waves in straight ducts and turbulent flow conditions | In this paper the propagation of acoustic plane waves in turbulent, fully
developed flow is studied by means of an experimental investigation carried out
in a straight, smooth-walled duct.The presence of a coherent perturbation, such
as an acoustic wave in a turbulent confined flow, generates the oscillation of
the wal... | 1812.11063v1 |
2019-01-30 | Transverse waves in coronal flux tubes with thick boundaries: The effect of longitudinal flows | Observations show that transverse magnetohydrodynamic (MHD) waves and flows
are often simultaneously present in magnetic loops of the solar corona. The
waves are resonantly damped in the Alfv\'en continuum because of plasma and/or
magnetic field nonuniformity across the loop. The resonant damping is relevant
in the con... | 1901.10785v1 |
2019-02-07 | Violent relaxation in the Hamiltonian Mean Field model: I. Cold collapse and effective dissipation | In $N$-body systems with long-range interactions mean-field effects dominate
over binary interactions (collisions), so that relaxation to thermal
equilibrium occurs on time scales that grow with $N$, diverging in the
$N\to\infty$ limit. However, a faster and non-collisional relaxation process,
referred to as violent re... | 1902.02436v2 |
2019-05-16 | Boundary control of partial differential equations using frequency domain optimization techniques | We present a frequency domain based $H_\infty$-control strategy to solve
boundary control problems for systems governed by parabolic or hyperbolic
partial differential equation, where controllers are constrained to be
physically implementable and of simple structure suited for practical
applications. The efficiency of ... | 1905.06786v1 |
2019-05-20 | Sharp Bounds for Oscillatory Integral Operators with Homogeneous Polynomial Phases | We obtain sharp $L^p$ bounds for oscillatory integral operators with generic
homogeneous polynomial phases in several variables. The phases considered in
this paper satisfy the rank one condition which is an important notion
introduced by Greenleaf, Pramanik and Tang. Under certain additional
assumptions, we can establ... | 1905.07980v1 |
2019-06-06 | Well-posedness and exponential decay estimates for a Korteweg-de Vries-Burgers equation with time-delay | We consider the KdV-Burgers equation and its linear version in presence of a
delay feedback. We prove well-posedness of the models and exponential decay
estimates under appropriate conditions on the damping coefficients. Our
arguments rely on a Lyapunov functional approach combined with a step by step
procedure and sem... | 1906.02488v1 |
2019-06-19 | Accurate Lindblad-Form Master Equation for Weakly Damped Quantum Systems Across All Regimes | Realistic models of quantum systems must include dissipative interactions
with an environment. For weakly-damped systems the Lindblad-form Markovian
master equation is invaluable for this task due to its tractability and
efficiency. This equation only applies, however, when the frequencies of any
subset of the system's... | 1906.08279v2 |
2019-07-10 | Heuristic construction of codeword stabilized codes | The family of codeword stabilized codes encompasses the stabilizer codes as
well as many of the best known nonadditive codes. However, constructing optimal
$n$-qubit codeword stabilized codes is made difficult by two main factors. The
first of these is the exponential growth with $n$ of the number of graphs on
which a ... | 1907.04537v2 |
2019-07-10 | Exponential stability for the nonlinear Schrödinger equation on a star-shaped network | In this paper, we prove the exponential stability of the solution of the
nonlinear dissipative Schr\"odinger equation on a star-shaped network and where
the damping is localized on one branch and at the infinity. | 1907.04950v1 |
2019-07-22 | Role of charge equilibration in multinucleon transfer in damped collisions of heavy ions | In this work, the charge equilibration process has been analyzed within the
Langevin-type dynamical approach. Its duration and energy dependence are
discussed. We have analyzed the isotopic distributions of final products
obtained in the isospin-asymmetric 58Ni,40Ca + 208Pb reactions. Comparison of
58Ni,64Ni + 208Pb sy... | 1907.09352v1 |
2019-09-25 | Neutrino decoherence in a fermion and scalar background | We consider the decoherence effects in the propagation of neutrinos in a
background composed of a scalar particle and a fermion due to the non-forward
neutrino scattering processes. Using a simple model for the coupling of the
form $\bar f_R\nu_L\phi$ we calculate the contribution to the imaginary part of
the neutrino ... | 1909.11271v2 |
2019-10-15 | Adversarial Examples for Models of Code | Neural models of code have shown impressive results when performing tasks
such as predicting method names and identifying certain kinds of bugs. We show
that these models are vulnerable to adversarial examples, and introduce a novel
approach for attacking trained models of code using adversarial examples. The
main idea... | 1910.07517v5 |
2019-11-21 | Special Itô maps and an $L^2$ Hodge theory for one forms on path spaces | We prove a Kodaira-Hodge decomposition on differential 1-forms on the space
of non-smooth paths over a Riemannian manifold, allowing us to define the
corresponding first cohomology group. This uses the It\^o map of a Brownian
system and damped stochastic parallel translation. | 1911.09618v1 |
2019-12-03 | The global classical solution to compressible Euler system with velocity alignment | In this paper, the compressible Euler system with velocity alignment and
damping is considered, where the influence matrix of velocity alignment is not
positive definite. Sound speed is used to reformulate the system into symmetric
hyperbolic type. The global existence and uniqueness of smooth solution for
small initia... | 1912.01374v1 |
2019-12-23 | Signal Analysis using Born-Jordan-type Distribution | In this note we exhibit recent advances in signal analysis via time-frequency
distributions. New members of the Cohen class, generalizing the Wigner
distribution, reveal to be effective in damping artefacts of some signals. We
will survey their main properties and drawbacks and present open problems
related to such phe... | 1912.11387v1 |
2020-01-15 | Weak pseudo-bosons | We show how the notion of {\em pseudo-bosons}, originally introduced as
operators acting on some Hilbert space, can be extended to a distributional
settings. In doing so, we are able to construct a rather general framework to
deal with generalized eigenvectors of the multiplication and of the derivation
operators. Conn... | 2001.05219v1 |
2020-02-14 | Testing Physical Models for Cosmic Ray Transport Coefficients on Galactic Scales: Self-Confinement and Extrinsic Turbulence at GeV Energies | The microphysics of ~GeV cosmic ray (CR) transport on galactic scales remain
deeply uncertain, with almost all studies adopting simple prescriptions (e.g.
constant-diffusivity). We explore different physically-motivated, anisotropic,
dynamical CR transport scalings in high-resolution cosmological FIRE
simulations of dw... | 2002.06211v2 |
2020-02-18 | Boundary feedback control of an anti-stable wave equation | We discuss boundary control of a wave equation with a non-linear anti-damping
boundary condition. We design structured finite-dimensional $H_\infty$-output
feedback controllers which stabilize the infinite dimensional system
exponentially in closed loop. The method is applied to control torsional
vibrations in drilling... | 2002.07567v1 |
2020-03-23 | Critical exponent for the wave equation with a time-dependent scale invariant damping and a cubic convolution | In the present paper, we study the Cauchy problem for the wave equation with
a time-dependent scale invariant damping $\frac{2}{1+t}\partial_t v$ and a
cubic convolution $(|x|^{-\gamma}*v^2)v$ with $\gamma\in
\left(-\frac{1}{2},3\right)$ in three spatial dimension for initial data
$\left(v(x,0),\partial_tv(x,0)\right)\... | 2003.10329v2 |
2020-06-29 | General decay and blow-up of solutions for a nonlinear wave equation with memory and fractional boundary damping terms | The paper studies the global existence and general decay of solutions using
Lyaponov functional for a nonlinear wave equation, taking into account the
fractional derivative boundary condition and memory term. In addition, we
establish the blow up of solutions with nonpositive initial energy. | 2006.16325v1 |
2020-07-19 | Entanglement-Coherence and Discord-Coherence analytical relations for X states | In this work we derive analytical relations between Entanglement and
Coherence as well as between Discord and Coherence, for Bell-diagonal states
and for X states, evolving under the action of several noise channels: Bit
Flip, Phase Damping and Depolarizing. We demonstrate that for these families,
Coherence is the fund... | 2007.09792v1 |
2020-08-08 | Linear Stability of the 2D Irrotational Circulation Flow around An Elliptical Cylinder | In this article we prove a linear inviscid damping result with optimal decay
rates of the 2D irrotational circulation flow around an elliptical cylinder. In
our result, all components of the asymptotic velocity field do not vanish and
the asymptotic flow lines are not ellipse any more. | 2008.03451v1 |
2020-09-01 | On the first $δ$ Sct--roAp hybrid pulsator and the stability of p and g modes in chemically peculiar A/F stars | Strong magnetic fields in chemically peculiar A-type (Ap) stars typically
suppress low-overtone pressure modes (p modes) but allow high-overtone p modes
to be driven. KIC 11296437 is the first star to show both. We obtained and
analysed a Subaru spectrum, from which we show that KIC 11296437 has abundances
similar to o... | 2009.00730v1 |
2020-09-24 | The eccentricity distribution of giant planets and their relation to super-Earths in the pebble accretion scenario | Observations of the population of cold Jupiter planets ($r>$1 AU) show that
nearly all of these planets orbit their host star on eccentric orbits. For
planets up to a few Jupiter masses, eccentric orbits are thought to be the
outcome of planet-planet scattering events taking place after gas dispersal. We
simulate the g... | 2009.11725v3 |
2020-10-12 | Period Estimates for Autonomous Evolution Equations with Lipschitz Nonlinearities | We derive an estimate for the minimal period of autonomous strongly damped
hyperbolic problems. Our result corresponds to the works by Yorke, Busenberg et
al. for ordinary differential equations as well as Robinson and Vidal-Lopez for
parabolic problems. A general approach is developed for treating both
hyperbolic and ... | 2010.05829v1 |
2020-12-16 | Observation of anti-damping spin-orbit torques generated by in-plane and out-of-plane spin polarizations in MnPd3 | High spin-orbit torques (SOTs) generated by topological materials and heavy
metals interfaced with a ferromagnetic layer show promise for next generation
magnetic memory and logic devices. SOTs generated from the in-plane spin
polarization along y-axis originated by the spin Hall and Edelstein effects can
switch magnet... | 2012.09315v1 |
2021-02-15 | A transmission problem for waves under time-varying delay and nonlinear weight | This manuscript focus on in the transmission problem for one dimensional
waves with nonlinear weights on the frictional damping and time-varying delay.
We prove global existence of solutions using Kato's variable norm technique and
we show the exponential stability by the energy method with the construction of
a suitab... | 2102.07829v1 |
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