publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2013-03-21 | Optimizing atomic resolution of force microscopy in ambient conditions | Ambient operation poses a challenge to AFM because in contrast to operation
in vacuum or liquid environments, the cantilever dynamics change dramatically
from oscillating in air to oscillating in a hydration layer when probing the
sample. We demonstrate atomic resolution by imaging of the KBr(001) surface in
ambient co... | 1303.5204v2 |
2013-04-10 | Current Sheets and Collisionless Damping in Kinetic Plasma Turbulence | We present the first study of the formation and dissipation of current sheets
at electron scales in a wave-driven, weakly collisional, 3D kinetic turbulence
simulation. We investigate the relative importance of dissipation associated
with collisionless damping via resonant wave-particle interactions versus
dissipation ... | 1304.2958v2 |
2013-04-23 | Existence and non-existence of breather solutions in damped and driven nonlinear lattices | We investigate the existence of spatially localised solutions, in the form of
discrete breathers, in general damped and driven nonlinear lattice systems of
coupled oscillators. Conditions for the exponential decay of the difference
between the maximal and minimal amplitudes of the oscillators are provided
which proves ... | 1304.6370v3 |
2013-06-21 | Inviscid damping and the asymptotic stability of planar shear flows in the 2D Euler equations | We prove asymptotic stability of shear flows close to the planar Couette flow
in the 2D inviscid Euler equations on $\Torus \times \Real$. That is, given an
initial perturbation of the Couette flow small in a suitable regularity class,
specifically Gevrey space of class smaller than 2, the velocity converges
strongly i... | 1306.5028v3 |
2013-07-12 | Spin injection from topological insulator tunnel-coupled to metallic leads | We study theoretically helical edge states of 2D and 3D topological
insulators (TI) tunnel-coupled to metal leads and show that their transport
properties are strongly affected by contacts as the latter play a role of a
heat bath and induce damping and relaxation of electrons in the helical states
of TI. A simple struc... | 1307.3333v1 |
2013-07-19 | Damping and non-linearity of a levitating magnet in rotation above a superconductor | We study the dissipation of moving magnets in levitation above a
superconductor. The rotation motion is analyzed using optical tracking
techniques. It displays a remarkable regularity together with long damping time
up to several hours. The magnetic contribution to the damping is investigated
in detail by comparing 14 ... | 1307.5155v1 |
2013-07-19 | Perfect squeezing by damping modulation in circuit quantum electrodynamics | Dissipation-driven quantum state engineering uses the environment to steer
the state of quantum systems and preserve quantum coherence in the steady
state. We show that modulating the damping rate of a microwave resonator
generates a vacuum squeezed state of arbitrary squeezing strength, thereby
constituting a mechanis... | 1307.5311v2 |
2013-07-27 | Charge-carrier-induced frequency renormalization, damping and heating of vibrational modes in nanoscale junctions | In nanoscale junctions the interaction between charge carriers and the local
vibrations results in renormalization, damping and heating of the vibrational
modes. We here formulate a nonequilibrium Green's functions based theory to
describe such effects. Studying a generic junction model with an off-resonant
electronic ... | 1307.7288v3 |
2013-07-30 | Phase retrapping in a pointlike $\varphi$ Josephson junction: the Butterfly effect | We consider a $\varphi$ Josephson junction, which has a bistable zero-voltage
state with the stationary phases $\psi=\pm\varphi$. In the non-zero voltage
state the phase "moves" viscously along a tilted periodic double-well
potential. When the tilting is reduced quasistatically, the phase is retrapped
in one of the pot... | 1307.8042v1 |
2013-08-02 | Spin pumping damping and magnetic proximity effect in Pd and Pt spin-sink layers | We investigated the spin pumping damping contributed by paramagnetic layers
(Pd, Pt) in both direct and indirect contact with ferromagnetic
Ni$_{81}$Fe$_{19}$ films. We find a nearly linear dependence of the
interface-related Gilbert damping enhancement $\Delta\alpha$ on the heavy-metal
spin-sink layer thicknesses t$_\... | 1308.0450v2 |
2013-08-10 | CESR Test Accelerator | The Cornell Electron Storage Ring (CESR) was reconfigured in 2008 as a test
accelerator to investigate the physics of ultra-low emittance damping rings.
During the approximately 40 days/year available for dedicated operation as a
test accelerator, specialized instrumentation is used to measure growth and
mitigation of ... | 1308.2325v1 |
2013-09-09 | Characterization of the International Linear Collider damping ring optics | A method is presented for characterizing the emittance dilution and dynamic
aperture for an arbitrary closed lattice that includes guide field magnet
errors, multipole errors and misalignments. This method, developed and tested
at the Cornell Electron Storage Ring Test Accelerator (CesrTA), has been
applied to the damp... | 1309.2248v3 |
2013-09-19 | Van der Waals Coefficients for the Alkali-metal Atoms in the Material Mediums | The damping coefficients for the alkali atoms are determined very accurately
by taking into account the optical properties of the atoms and three distinct
types of trapping materials such as Au (metal), Si (semi-conductor) and
vitreous SiO2 (dielectric). Dynamic dipole polarizabilities are calculated
precisely for the ... | 1309.4897v1 |
2013-10-13 | What the Timing of Millisecond Pulsars Can Teach us about Their Interior | The cores of compact stars reach the highest densities in nature and
therefore could consist of novel phases of matter. We demonstrate via a
detailed analysis of pulsar evolution that precise pulsar timing data can
constrain the star's composition, through unstable global oscillations
(r-modes) whose damping is determi... | 1310.3524v2 |
2013-11-28 | Conservative effects in spin-transfer-driven magnetization dynamics | It is shown that under appropriate conditions spin-transfer-driven
magnetization dynamics in a single-domain nanomagnet is conservative in nature
and admits a specific integral of motion, which is reduced to the usual
magnetic energy when the spin current goes to zero. The existence of this
conservation law is connecte... | 1311.7344v1 |
2013-12-05 | The initial condition problems of damped quantum harmonic oscillator | We investigate the exact dynamics of the damped quantum harmonic oscillator
under the (un)correlated initial conditions. The master equation is generalized
to the cases of the arbitrary factorized state and/or Gaussian state. We show
that the variances of the factorized Gaussian state do not sensitively depend
on the i... | 1312.1454v1 |
2013-12-13 | Optical variability of quasars: a damped random walk | A damped random walk is a stochastic process, defined by an exponential
covariance matrix that behaves as a random walk for short time scales and
asymptotically achieves a finite variability amplitude at long time scales.
Over the last few years, it has been demonstrated, mostly but not exclusively
using SDSS data, tha... | 1312.3966v1 |
2013-12-25 | Non-linear damping of visco-resistive Alfven waves in solar spicules | Interaction of Alfven waves with plasma inhomogeneities generates phase
mixing which can lead to dissipate Alfven waves and to heat the solar plasma.
Here we study the dissipation of Alfven waves by phase mixing due to viscosity
and resistivity variations with height. We also consider nonlinear
magnetohydrodynamic (MHD... | 1312.7866v1 |
2013-12-31 | A novel variability-based method for quasar selection: evidence for a rest frame ~54 day characteristic timescale | We compare quasar selection techniques based on their optical variability
using data from the Catalina Real-time Transient Survey (CRTS). We introduce a
new technique based on Slepian wavelet variance (SWV) that shows comparable or
better performance to structure functions and damped random walk models but
with fewer a... | 1401.1785v1 |
2014-02-09 | Manipulation of tripartite-to-bipartite entanglement localization under quantum noises and its application to entanglement distribution | This paper is to investigate the effects of quantum noises on entanglement
localization by taking an example of reducing a three-qubit
Greenberger-Horne-Zeilinger (GHZ) state to a two-qubit entangled state. We
consider, respectively, two types of quantum decoherence, i.e.,
amplitude-damping and depolarizing decoherence... | 1402.1914v2 |
2014-02-25 | Thermodynamic anomalies in the presence of dissipation: from the free particle to the harmonic oscillator | A free particle coupled to a heat bath can exhibit a number of thermodynamic
anomalies like a negative specific heat or reentrant classicality. These
low-temperature phenomena are expected to be modified at very low temperatures
where finite-size effects associated with the discreteness of the energy
spectrum become re... | 1402.6221v1 |
2014-02-26 | Magneto-elastic modes and lifetime of magnons in thin yttrium-iron garnet films | We calculate the effects of the spin-lattice coupling on the magnon spectrum
of thin ferromagnetic films consisting of the magnetic insulator yttrium-iron
garnet. The magnon-phonon hybridisation generates a characteristic minimum in
the spin dynamic structure factor which quantitatively agrees with recent
Brillouin lig... | 1402.6575v2 |
2014-03-10 | Quantum Fisher Information of W States in Decoherence Channels | We study the quantum Fisher information (QFI) of W states analytically with
respect to SU(2) rotations in the basic decoherence channels i.e. depolarizing
(DPC), amplitude damping (ADC) and phase damping (PDC), and present the
interesting behavior of QFI of W states, especially when compared to that of
GHZ states [Ma e... | 1403.2376v1 |
2014-03-14 | Silk damping at a redshift of a billion: a new limit on small-scale adiabatic perturbations | We study the dissipation of small-scale adiabatic perturbations at early
times when the Universe is hotter than T ~ 0.5 keV. When the wavelength falls
below the damping scale 1/kD, the acoustic modes diffuse and thermalize,
causing entropy production. Before neutrino decoupling, kD is primarily set by
the neutrino shea... | 1403.3697v1 |
2014-06-02 | CMB $μ$ distortion from primordial gravitational waves | We propose a new mechanism of generating the $\mu$ distortion in cosmic
microwave background (CMB) originated from primordial gravitational waves. Such
$\mu$ distortion is generated by the damping of the temperature anisotropies
through the Thomson scattering, even on scales larger than that of Silk
damping. This mecha... | 1406.0451v2 |
2014-06-04 | Self-organized escape processes of linear chains in nonlinear potentials | An enhancement of localized nonlinear modes in coupled systems gives rise to
a novel type of escape process. We study a spatially one dimensional set-up
consisting of a linearly coupled oscillator chain of $N$ mass-points situated
in a metastable nonlinear potential. The Hamilton-dynamics exhibits breather
solutions as... | 1406.0938v1 |
2014-06-08 | Dissipation-driven squeezed and sub-Poissonian mechanical states in quadratic optomechanical systems | In this work we study an optomechanical system in which there is a purely
quadratic optomechanical coupling between the optical and mechanical modes. The
optical mode is pumped by three coherent fields and the mechanical mode is
parametrically driven. We show that if the frequencies and amplitudes of both
optical and m... | 1406.1987v3 |
2014-06-13 | Frequency-dependent damping in propagating slow magneto-acoustic waves | Propagating slow magneto-acoustic waves are often observed in polar plumes
and active region fan loops. The observed periodicities of these waves range
from a few minutes to few tens of minutes and their amplitudes were found to
decay rapidly as they travel along the supporting structure. Previously,
thermal conduction... | 1406.3565v1 |
2014-06-24 | Interface enhancement of Gilbert damping from first-principles | The enhancement of Gilbert damping observed for Ni80Fe20 (Py) films in
contact with the non-magnetic metals Cu, Pd, Ta and Pt, is quantitatively
reproduced using first-principles scattering theory. The "spin-pumping" theory
that qualitatively explains its dependence on the Py thickness is generalized
to include a numbe... | 1406.6225v2 |
2014-06-24 | On finite density effects on cosmic reheating and moduli decay and implications for Dark Matter production | We study the damping of an oscillating scalar field in a
Friedmann-Robertson-Walker spacetime by perturbative processes, taking into
account the finite density effects that interactions with the plasma of decay
products have on the damping rate. The scalar field may be identified with the
inflaton, in which case this p... | 1406.6243v2 |
2014-08-13 | Probing dense matter in compact star cores with radio pulsar data | Astrophysical observations of compact stars provide, in addition to collider
experiments, the other big source of information on matter under extreme
conditions. The largest and most precise data set about neutron stars is the
timing data of radio pulsars. We show how this unique data can be used to learn
about the ult... | 1408.3152v1 |
2014-09-04 | A numerical study of the pull-in instability in some free boundary models for MEMS | In this work we numerically compute the bifurcation curve of stationary
solutions for the free boundary problem for MEMS in one space dimension. It has
a single turning point, as in the case of the small aspect ratio limit. We also
find a threshold for the existence of global-in-time solutions of the evolution
equation... | 1409.1291v2 |
2014-09-15 | Direct path from microscopic mechanics to Debye shielding, Landau damping, and wave-particle interaction | The derivation of Debye shielding and Landau damping from the $N$-body
description of plasmas is performed directly by using Newton's second law for
the $N$-body system. This is done in a few steps with elementary calculations
using standard tools of calculus, and no probabilistic setting. Unexpectedly,
Debye shielding... | 1409.4323v1 |
2014-09-19 | Damping of metallized bilayer nanomechanical resonators at room temperature | We investigate the influence of gold thin-films subsequently deposited on a
set of initially bare, doubly clamped, high-stress silicon nitride string
resonators at room temperature. Analytical expressions for resonance frequency,
quality factor and damping for both in- and out-of-plane flexural modes of the
bilayer sys... | 1409.5670v1 |
2014-10-09 | Non-Fermi-liquid behavior and anomalous suppression of Landau damping in layered metals close to ferromagnetism | We analyse the low-energy physics of nearly ferromagnetic metals in two
spatial dimensions using the functional renormalization group technique. We
find a new low-energy fixed point, at which the fermionic (electron-like)
excitations are non-Fermi-liquid ($z_f = 13/10$) and the magnetic fluctuations
exhibit an anomalou... | 1410.2539v3 |
2014-10-09 | Special mean motion resonance pairs: Mimas-Tethys and Titan-Hyperion | Five pairs of large solar system satellites occupy first order mean-motion
resonances (MMRs). Among these, the pairs of Mimas-Tethys and Titan-Hyperion
are special. They are located much deeper in resonance than the others and
their critical arguments librate with much greater amplitudes. These
characteristics are trac... | 1410.2648v1 |
2014-11-13 | Stability and bifurcation for the Kuramoto model | We study the mean-field limit of the Kuramoto model of globally coupled
oscillators. By studying the evolution in Fourier space and understanding the
domain of dependence, we show a global stability result. Moreover, we can
identify function norms to show damping of the order parameter for velocity
distributions and pe... | 1411.3752v3 |
2014-11-26 | A singular finite element technique for calculating continuum damping of Alfvén eigenmodes | Damping due to continuum resonances can be calculated using dissipation-less
ideal magnetohydrodynamics (MHD) provided that the poles due to these
resonances are properly treated. We describe a singular finite element
technique for calculating the continuum damping of Alfv\'{e}n waves. A
Frobenius expansion is used to ... | 1411.7111v1 |
2014-11-26 | Energy decay for a locally undamped wave equation | We study the decay rate for the energy of solutions of a damped wave equation
in a situation where the Geometric Control Condition is violated. We assume
that the set of undamped trajectories is a flat torus of positive codimension
and that the metric is locally flat around this set. We further assume that the
damping ... | 1411.7271v1 |
2014-12-05 | Calculating linear response functions for finite temperatures on the basis of the alloy analogy model | A scheme is presented that is based on the alloy analogy model and allows to
account for thermal lattice vibrations as well as spin fluctuations when
calculating response quantities in solids. Various models to deal with spin
fluctuations are discussed concerning their impact on the resulting temperature
dependent magn... | 1412.1988v1 |
2014-12-05 | Entanglement Dynamics of Quantum Oscillators Nonlinearly Coupled to Thermal Environments | We study the asymptotic entanglement of two quantum harmonic oscillators
nonlinearly coupled to an environment. Coupling to independent baths and a
common bath are investigated. Numerical results obtained using the
Wangsness-Bloch-Redfield method are supplemented by analytical results in the
rotating wave approximation... | 1412.1999v1 |
2014-12-08 | The dispersion modification of electrostatic geodesic acoustic mode by electron geodesic drift current | The past studies treated the perturbed distribution of circulating electrons
as adiabatic one when studying the dispersion relation of electrostatic
geodesic acoustic mode(GAM). In this paper, the flow of electron geodesic
current (FEGC) is added to modify this adiabatic distribution. Based on the
drift kinetic theory,... | 1412.2481v1 |
2014-12-10 | Alfvenic Turbulence Beyond the Ambipolar Diffusion Scale | We investigate the nature of the Alfv\'enic turbulence cascade in two fluid
MHD simulations in order to determine if turbulence is damped once the ion and
neutral species become decoupled at a critical scale called the ambipolar
diffusion scale (L$_{AD}$). Using mode decomposition to separate the three
classical MHD mo... | 1412.3452v1 |
2015-01-19 | Linear wave action decay entailed by Landau damping in inhomogeneous, nonstationary and anisotropic plasma | This paper addresses the linear propagation of an electron wave in a
collisionless, inhomogeneous, nonstationary and anisotropic plasma. The plasma
is characterized by its distribution function, $f_H$, at zero order in the wave
amplitude. This distribution function, from which are derived all the
hydrodynamical quantit... | 1501.04485v1 |
2015-01-23 | Response solutions for quasi-periodically forced, dissipative wave equations | We consider several models of nonlinear wave equations subject to very strong
damping and quasi-periodic external forcing. This is a singular perturbation,
since the damping is not the highest order term. We study the existence of
response solutions (i.e., quasi-periodic solutions with the same frequency as
the forcing... | 1501.05979v1 |
2015-01-30 | A large-scale magnetic shield with 10^6 damping at mHz frequencies | We present a magnetically shielded environment with a damping factor larger
than one million at the mHz frequency regime and an extremely low field and
gradient over an extended volume. This extraordinary shielding performance
represents an improvement of the state of the art in damping the difficult
regime of very low... | 1501.07861v4 |
2015-02-01 | A Study on the Impact of Wind Generation on the Stability of Electromechanical Oscillations | Wind is becoming an increasingly significant source of energy in modern power
generation. Amongst existing technologies, Variable Speed Wind Turbines (VSWT)
equipped with Double Fed Induction Generators (DFIG) is widely deployed.
Consequently, power systems are now experiencing newer power flow patterns and
operating c... | 1502.00215v1 |
2015-02-16 | Biomimetic Staggered Composites with Highly Enhanced Energy Dissipation: Design, Modeling, and Test | We investigate the damping enhancement in a class of biomimetic staggered
composites via a combination of design, modeling, and experiment. In total,
three kinds of staggered composites are designed by mimicking the structure of
bone and nacre. These composite designs are realized by 3D printing a rigid
plastic and a v... | 1502.04568v1 |
2015-03-02 | DAMPE silicon tracker on-board data compression algorithm | The Dark Matter Particle Explorer (DAMPE) is an upcoming scientific satellite
mission for high energy gamma-ray, electron and cosmic rays detection. The
silicon tracker (STK) is a sub detector of the DAMPE payload with an excellent
position resolution (readout pitch of 242um), which measures the incident
direction of p... | 1503.00415v1 |
2015-03-08 | MHD Seismology of a loop-like filament tube by observed kink waves | We report and analyze the observational evidence of global kink oscillations
in a solar filament as observed in H alpha by National Solar Observatory
(NSO)/Global Oscillation Network Group (GONG) instrument. An M1.1-class flare
in active region 11692 on 2013 March 15 induced a global kink mode in the
filament lying in ... | 1503.02281v1 |
2015-03-13 | Comparison of spin-orbit torques and spin pumping across NiFe/Pt and NiFe/Cu/Pt interfaces | We experimentally investigate spin-orbit torques and spin pumping in NiFe/Pt
bilayers with direct and interrupted interfaces. The damping-like and
field-like torques are simultaneously measured with spin-torque ferromagnetic
resonance tuned by a dc bias current, whereas spin pumping is measured
electrically through the... | 1503.04104v3 |
2015-03-24 | Global weak solutions to compressible quantum Navier-Stokes equations with damping | The global-in-time existence of weak solutions to the barotropic compressible
quantum Navier-Stokes equations with damping is proved for large data in three
dimensional space. The model consists of the compressible Navier-Stokes
equations with degenerate viscosity, and a nonlinear third-order differential
operator, wit... | 1503.06894v4 |
2015-03-30 | Suppression of Spin Pumping Between Ni$_{80}$Fe$_{20}$ and Cu by a Graphene Interlayer | We compare ferromagnetic resonance measurements of Permalloy
Ni$_{80}$Fe$_{20}$ (Py) films sputtered onto Cu(111) films with and without a
graphene (Gr) interlayer grown by chemical vapor deposition before Py
deposition. A two-angle sputtering method ensured that neither Gr nor Py was
degraded by the sample preparation... | 1503.08777v1 |
2015-04-02 | Protecting the $\sqrt{SWAP}$ operation from general and residual errors by continuous dynamical decoupling | We study the occurrence of errors in a continuously decoupled two-qubit state
during a $\sqrt{SWAP}$ quantum operation under decoherence. We consider a
realization of this quantum gate based on the Heisenberg exchange interaction,
which alone suffices for achieving universal quantum computation. Furthermore,
we introdu... | 1504.00592v1 |
2015-04-07 | Damped Oscillating Dark Energy: Ideal Fluid and Scalar-Tensor description | In this paper, we study damped oscillating form of dark energy for explaining
dynamics of universe. First of all, we consider universe is filled with an
ideal fluid which has damped oscillating dark energy in terms of this case we
calculate several physical quantities such as Hubble parameter, acceleration
parameter, e... | 1504.01509v2 |
2015-04-17 | Temperature-dependent Plasmons and Their Damping Rates for Graphene with a Finite Energy Bandgap | We obtained numerical and closed-form analytic expressions for
finite-temperature plasmon dispersion relations for intrinsic graphene in the
presence of a finite energy gap in the energy spectrum. The calculations were
carried out using the random-phase approximation. The analytic results have
been derived in the high ... | 1504.04552v1 |
2015-05-09 | Existence, general decay and blow-up of solutions for a viscoelastic Kirchhoff equation with Balakrishnan-Taylor damping and dynamic boundary conditions | Our aim in this article is to study a nonlinear viscoelastic Kirchhoff
equation with strong damping, Balakrishnan-Taylor damping, nonlinear source and
dynamical boundary condition. Firstly, we prove the local existence of
solutions by using the Faedo-Galerkin approximation method combined with a
contraction mapping the... | 1505.02220v3 |
2015-06-03 | Migration of two massive planets into (and out of) first order mean motion resonances | We consider the dynamical evolution of two planets orbiting in the vicinity
of a first order mean motion reso- nance while simultaneously undergoing
eccentricity damping and convergent migration. Following Goldreich &
Schlichting (2014), we include a coupling between the dissipative semimajor
axis evolution and the dam... | 1506.01382v1 |
2015-06-12 | Linear inviscid damping for monotone shear flows in a finite periodic channel, boundary effects, blow-up and critical Sobolev regularity | In a previous article, \cite{Zill3}, we have established linear inviscid
damping for a large class of monotone shear flows in a finite periodic channel
and have further shown that boundary effects asymptotically lead to the
formation of singularities of derivatives of the solution. As the main results
of this article, ... | 1506.04010v1 |
2015-06-12 | Nonlinear damped partial differential equations and their uniform discretizations | We establish sharp energy decay rates for a large class of nonlinearly
first-order damped systems, and we design discretization schemes that inherit
of the same energy decay rates, uniformly with respect to the space and/or time
discretization parameters, by adding appropriate numerical viscosity terms. Our
main argume... | 1506.04163v2 |
2015-06-17 | Landau Damping of Electrostatic Waves in Arbitrarily Degenerate Quantum Plasmas | We carry out a systematic study of the dispersion relation for linear
electrostatic waves in an arbitrarily degenerate quantum electron plasma. We
solve for the complex frequency spectrum for arbitrary values of wavenumber $k$
and level of degeneracy $\mu$. Our finding is that for large $k$ and high $\mu$
the real part... | 1506.05494v2 |
2015-06-25 | Simultaneous Interconnection and Damping Assignment Passivity-based Control of Mechanical Systems Using Generalized Forces | To extend the realm of application of the well known controller design
technique of interconnection and damping assignment passivity-based control
(IDA-PBC) of mechanical systems two modifications to the standard method are
presented in this article. First, similarly to [1], it is proposed to avoid the
splitting of the... | 1506.07679v1 |
2015-07-20 | Bifurcation of the quasinormal spectrum and Zero Damped Modes for rotating dilatonic black holes | It has been recently found that for the near extremal Kerr black holes
appearing of Zero Damped Modes (accompanied by qusinormal mode branching)
signifies about inapplicability of the regime of small perturbations and the
onset of turbulence. Here we show that this phenomena is not limited by Kerr or
Kerr-Newman soluti... | 1507.05649v1 |
2015-07-24 | Effect of Landau damping on alternative ion-acoustic solitary waves in a magnetized plasma consisting of warm adiabatic ions and non-thermal electrons | Bandyopadhyay and Das [Phys. Plasmas, 9, 465-473, 2002] have derived a
nonlinear macroscopic evolution equation for ion acoustic wave in a magnetized
plasma consisting of warm adiabatic ions and non-thermal electrons including
the effect of Landau damping. In that paper they have also derived the
corresponding nonlinea... | 1507.06733v1 |
2015-08-05 | Quantum discord protection from amplitude damping decoherence | Entanglement is known to be an essential resource for many quantum
information processes. However, it is now known that some quantum features may
be acheived with quantum discord, a generalized measure of quantum correlation.
In this paper, we study how quantum discord, or more specifically, the measures
of entropic di... | 1508.00972v1 |
2015-09-03 | Stability analysis of degenerately-damped oscillations | Presented here is a study of well-posedness and asymptotic stability of a
"degenerately damped" PDE modeling a vibrating elastic string. The coefficient
of the damping may vanish at small amplitudes thus weakening the effect of the
dissipation. It is shown that the resulting dynamical system has strictly
monotonically ... | 1509.00917v1 |
2015-09-27 | On the well-posedness and asymptotic behavior of the generalized KdV-Burgers equation | In this paper we are concerned with the well-posedness and the exponential
stabilization of the generalized Korteweg-de Vries Burgers equation, posed on
the whole real line, under the effect of a damping term. Both problems are
investigated when the exponent p in the nonlinear term ranges over the interval
$[1,5)$. We ... | 1509.08148v1 |
2015-10-11 | Error estimates of finite element method for semi-linear stochastic strongly damped wave equation | In this paper, we consider a semi-linear stochastic strongly damped wave
equation driven by additive Gaussian noise. Following a semigroup framework, we
establish existence, uniqueness and space-time regularity of a mild solution to
such equation. Unlike the usual stochastic wave equation without damping, the
underlyin... | 1510.03028v1 |
2015-10-13 | Nonlocal torque operators in ab initio theory of the Gilbert damping in random ferromagnetic alloys | We present an ab initio theory of the Gilbert damping in substitutionally
disordered ferromagnetic alloys. The theory rests on introduced nonlocal
torques which replace traditional local torque operators in the well-known
torque-correlation formula and which can be formulated within the atomic-sphere
approximation. The... | 1510.03571v2 |
2015-11-10 | A study of energy correction for the electron beam data in the BGO ECAL of the DAMPE | The DArk Matter Particle Explorer (DAMPE) is an orbital experiment aiming at
searching for dark matter indirectly by measuring the spectra of photons,
electrons and positrons originating from deep space. The BGO electromagnetic
calorimeter is one of the key sub-detectors of the DAMPE, which is designed for
high energy ... | 1511.02998v1 |
2015-11-10 | Quantum Fisher and Skew information for Unruh accelerated Dirac qubit | We develop a Bloch vector representation of Unruh channel for a Dirac field
mode. This is used to provide a unified, analytical treatment of quantum Fisher
and Skew information for a qubit subjected to the Unruh channel, both in its
pure form as well as in the presence of experimentally relevant external noise
channels... | 1511.03029v1 |
2015-11-23 | Detection of high frequency oscillations and damping from multi-slit spectroscopic observations of the corona | During the total solar eclipse of 11 July 2010, multi-slit spectroscopic
observations of the solar corona were performed from Easter Island, Chile. To
search for high-frequency waves, observations were taken at a high cadence in
the green line at 5303 A due to [Fe xiv] and the red line at 6374 A due to [Fe
x]. The data... | 1511.07160v1 |
2015-11-26 | Uniform exponential stability of Galerkin approximations for damped wave systems | We consider the numerical approximation of linear damped wave systems by
Galerkin approximations in space and appropriate time-stepping schemes. Based
on a dissipation estimate for a modified energy, we prove exponential decay of
the physical energy on the continuous level provided that the damping is
effective everywh... | 1511.08341v1 |
2015-12-01 | Epitaxial patterning of nanometer-thick Y3Fe5O12 films with low magnetic damping | Magnetic insulators such as yttrium iron garnet, Y3Fe5O12, with extremely low
magnetic damping have opened the door for low power spin-orbitronics due to
their low energy dissipation and efficient spin current generation and
transmission. We demonstrate reliable and efficient epitaxial growth and
nanopatterning of Y3Fe... | 1512.00286v1 |
2015-12-03 | Probing Bogoliubov quasiparticles in superfluid $^3$He with a 'vibrating-wire like' MEMS device | We have measured the interaction between superfluid $^3$He-B and a
micro-machined goalpost-shaped device at temperatures below $0.2\,T_c$. The
measured damping follows well the theory developed for vibrating wires, in
which the Andreev reflection of quasiparticles in the flow field around the
moving structure leads to ... | 1512.01033v1 |
2016-01-03 | Event-triggered Communication in Wide-area Damping Control: A Limited Output Feedback Based Approach | A conceptual design methodology is proposed for event-triggered based power
system wide area damping controller. The event-triggering mechanism is adopted
to reduce the communication burden between origin of the remote signal and the
wide area damping controller (WADC) location. The remote signal is transmitted
to the ... | 1601.00255v1 |
2016-01-05 | Lie transformation method on quantum state evolution of a general time-dependent driven and damped parametric oscillator | A variety of dynamics in nature and society can be approximately treated as a
driven and damped parametric oscillator. An intensive investigation of this
time-dependent model from an algebraic point of view provides a consistent
method to resolve the classical dynamics and the quantum evolution in order to
understand t... | 1601.00727v3 |
2016-02-19 | Distinctive response of many-body localized systems to strong electric field | We study systems which are close to or within the many-body localized (MBL)
regime and are driven by strong electric field. In the ergodic regime, the
disorder extends applicability of the equilibrium linear--response theory to
stronger drivings, whereas the response of the MBL systems is very distinctive,
revealing cu... | 1602.06055v1 |
2016-02-24 | Pressure of a gas of underdamped active dumbbells | The pressure exerted on a wall by a gas at equilibrium does not depend on the
shape of the confining potential defining the wall. In contrast, it has been
shown recently [A.P. Solon et al., Nat. Phys. 11, 673 (2015)] that a gas of
overdamped active particles exerts on a wall a force that depends on the
confining potent... | 1602.07420v1 |
2016-03-07 | Optimal Load and Stiffness for Displacement-Constrained Vibration Energy Harvesters | The power electronic interface to a vibration energy harvester not only
provides ac-dc conversion, but can also set the electrical damping to maximize
output power under displacement-constrained operation. This is commonly
exploited for linear two-port harvesters by synchronous switching to realize a
Coulomb-damped res... | 1603.01909v1 |
2016-03-22 | Generation and protection of steady-state quantum correlations due to quantum channels with memory | We have proposed a scheme of the generation and preservation of two-qubit
steady state quantum correlations through quantum channels where successive
uses of the channels are correlated. Different types of noisy channels with
memory, such as amplitude damping, phase-damping, and depolarizing channels
have been taken in... | 1603.06676v2 |
2016-03-31 | Recovery of time-dependent damping coefficients and potentials appearing in wave equations from partial data | We consider the inverse problem of determining a time-dependent damping
coefficient $a$ and a time-dependent potential $q$, appearing in the wave
equation $\partial_t^2u-\Delta_x u+a(t,x)\partial_tu+q(t,x)u=0$ in
$Q=(0,T)\times\Omega$, with $T>0$ and $\Omega$ a $ \mathcal C^2$ bounded domain
of $\mathbb R^n$, $n\geq2$,... | 1603.09600v2 |
2016-04-22 | Feedback-induced Bistability of an Optically Levitated Nanoparticle: A Fokker-Planck Treatment | Optically levitated nanoparticles have recently emerged as versatile
platforms for investigating macroscopic quantum mechanics and enabling
ultrasensitive metrology. In this article we theoretically consider two damping
regimes of an optically levitated nanoparticle cooled by cavityless parametric
feedback. Our treatme... | 1604.06767v2 |
2016-05-06 | Multidimensional Thermoelasticity for Nonsimple Materials -- Well-Posedness and Long-Time Behavior | An initial-boundary value problem for the multidimensional type III
thermoelaticity for a nonsimple material with a center of symmetry is
considered. In the linear case, the well-posedness with and without
Kelvin-Voigt and/or frictional damping in the elastic part as well as the lack
of exponential stability in the ela... | 1605.02049v1 |
2016-05-16 | The Cauchy problem for the nonlinear damped wave equation with slowly decaying data | We study the Cauchy problem for the nonlinear damped wave equation and
establish the large data local well-posedness and small data global
well-posedness with slowly decaying initial data. We also prove that the
asymptotic profile of the global solution is given by a solution of the
corresponding parabolic problem, whi... | 1605.04616v2 |
2016-05-20 | High-frequency behavior of FeN thin films fabricated by reactive sputtering | We investigated high-frequency behavior of FeN thin films prepared by
reactive sputtering through ferromagnetic resonance (FMR) and its relationship
with the static magnetic properties. The FMR was observed in the frequency
range from 2 to 18 GHz in the FeN films fabricated at proper nitrogen flow rate
(NFR). In those ... | 1605.06179v1 |
2016-06-08 | Effect of quantum noise on deterministic joint remote state preparation of a qubit state via a GHZ channel | Quantum secure communication brings a new direction for information security.
As an important component of quantum secure communication, deterministic joint
remote state preparation (DJRSP) could securely transmit a quantum state with
100\% success probability. In this paper, we study how the efficiency of DJRSP
is aff... | 1606.02484v2 |
2016-06-28 | Radiation Damping by Thomson Scattering | Synchrotron radiation of relativistic electrons in storage rings naturally
leads to the process of damping of betatron oscillations. Damping time and
transverse beam emittance can be reduced by wigglers or undulators while the
beam parameters are still well defined by the common radiation integrals, based
on the proper... | 1606.08602v5 |
2016-06-29 | Kinodynamic Motion Planning: A Novel Type Of Nonlinear, Passive Damping Forces And Advantages | This article extends the capabilities of the harmonic potential field
approach to planning to cover both the kinematic and dynamic aspects of a robot
motion. The suggested approach converts the gradient guidance field from a
harmonic potential to a control signal by augmenting it with a novel type of
damping forces cal... | 1606.09270v1 |
2016-07-18 | Magnetic Skyrmion Transport in a Nanotrack With Spatially Varying Damping and Non-adiabatic Torque | Reliable transport of magnetic skyrmions is required for any future
skyrmion-based information processing devices. Here we present a micromagnetic
study of the in-plane current-driven motion of a skyrmion in a ferromagnetic
nanotrack with spatially sinusoidally varying Gilbert damping and/or
non-adiabatic spin-transfer... | 1607.04983v3 |
2016-07-20 | Envelope equation for the linear and nonlinear propagation of an electron plasma wave, including the effects of Landau damping, trapping, plasma inhomogeneity, and the change in the state of wave | This paper addresses the linear and nonlinear three-dimensional propagation
of an electron wave in a collisionless plasma that may be inhomogeneous,
nonstationary, anisotropic and even weakly magnetized. The wave amplitude,
together with any hydrodynamic quantity characterizing the plasma (density,
temperature,...) are... | 1607.05844v2 |
2016-09-02 | Particle dynamics and Stochastic Resonance in Periodic potentials | We have studied the dynamics of a particle in a periodically driven
underdamped periodic potential. Recent studies have reported the occurrence of
Stochastic Resonance (SR) in such systems in the high frequency regime, using
input energy per period of external drive as a quantifier. The particle
trajectories in these s... | 1609.00678v1 |
2016-09-26 | An efficient quantum algorithm for spectral estimation | We develop an efficient quantum implementation of an important signal
processing algorithm for line spectral estimation: the matrix pencil method,
which determines the frequencies and damping factors of signals consisting of
finite sums of exponentially damped sinusoids. Our algorithm provides a quantum
speedup in a na... | 1609.08170v1 |
2016-10-01 | On the regularization of impact without collision: the Painlevé paradox and compliance | We consider the problem of a rigid body, subject to a unilateral constraint,
in the presence of Coulomb friction. We regularize the problem by assuming
compliance (with both stiffness and damping) at the point of contact, for a
general class of normal reaction forces. Using a rigorous mathematical
approach, we recover ... | 1610.00143v2 |
2016-10-21 | Spin transport and dynamics in all-oxide perovskite La$_{2/3}$Sr$_{1/3}$MnO$_3$/SrRuO$_3$ bilayers probed by ferromagnetic resonance | Thin films of perovskite oxides offer the possibility of combining emerging
concepts of strongly correlated electron phenomena and spin current in magnetic
devices. However, spin transport and magnetization dynamics in these complex
oxide materials are not well understood. Here, we experimentally quantify spin
transpor... | 1610.06661v1 |
2016-11-25 | Bulk viscous corrections to screening and damping in QCD at high temperatures | Non-equilibrium corrections to the distribution functions of quarks and
gluons in a hot and dense QCD medium modify the "hard thermal loops" (HTL). The
HTLs determine the retarded, advanced, and symmetric (time-ordered) propagators
for gluons with soft momenta as well as the Debye screening and Landau damping
mass scal... | 1611.08379v2 |
2016-12-07 | Investigation of Stimulated Brillouin Scattering in Laser-Plasma Interactions | In this paper, we present our numerical simulation results on the Stimulated
Brillouin Scattering (SBS) with injection of an ordinary mode (O-mode)
electromagnetic wave (our pump wave) with frequencies 70 GHz and 110 GHz.
Solving the Fourier transformed Vlasov equation in the velocity space, creates
a profile for distr... | 1612.02214v1 |
2016-12-07 | Gilbert damping of magnetostatic modes in a yttrium iron garnet sphere | The magnetostatic mode (MSM) spectrum of a 300$\mu$m diameter single
crystalline sphere of yttrium iron garnet is investigated using broadband
ferromagnetic resonance (FMR). The individual MSMs are identified via their
characteristic dispersion relations and the corresponding mode number tuples
$(nmr)$ are assigned. Ta... | 1612.02360v1 |
2016-12-08 | Damped spin-wave excitations in the itinerant antiferromagnet $γ$-Fe$_{0.7}$Mn$_{0.3}$ | The collective spin-wave excitations in the antiferromagnetic state of
$\gamma$-Fe$_{0.7}$Mn$_{0.3}$ were investigated using the inelastic neutron
scattering technique. The spin excitations remain isotropic up to the high
excitation energy, ${\hbar\omega}= 78$ meV. The excitations gradually become
broad and damped abov... | 1612.02515v2 |
2016-12-09 | How strong a logistic damping can prevent blow-up for the minimal Keller-Segel chemotaxis system? | In this paper, we study the minimal Keller-Segel model with a logistic source
and obtain quantitative and qualitative descriptions of the competition between
logistic damping and other ingredient, especially, chemotactic aggregation to
guarantee boundedness and convergence. More specifically, we establish how
precisely... | 1612.03024v2 |
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