publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2013-10-20 | Nonequilibrium stationary state for a damped rotator | Perturbative construction of the nonequilibrium steady state of a rotator
under a stochastic forcing while subject to torque and friction | 1310.5379v1 |
2013-11-07 | Spin-Orbit Torques and Anisotropic Magnetization Damping in Skyrmion Crystals | The length scale of the magnetization gradients in chiral magnets is
determined by the relativistic Dzyaloshinskii-Moriya interaction. Thus, even
conventional spin-transfer torques are controlled by the relativistic
spin-orbit coupling in these systems, and additional relativistic corrections
to the current-induced tor... | 1311.1778v1 |
2013-11-13 | Recent progress in attractors for quintic wave equations | We report on new results concerning the global well-posedness, dissipativity
and attractors of the damped quintic wave equations in bounded domains of R^3. | 1311.3290v1 |
2014-01-19 | Analytical Solution of Mathieu Equation | The general solution of the homogeneous damped Mathieu equation in the
analytical form, allowing its practical using in many applications, including
superconductivity studies, without numerical calculations has been found. | 1401.5348v1 |
2014-06-10 | Wigner's Space-time Symmetries based on the Two-by-two Matrices of the Damped Harmonic Oscillators and the Poincaré Sphere | The second-order differential equation for a damped harmonic oscillator can
be converted to two coupled first-order equations, with two two-by-two matrices
leading to the group $Sp(2)$. It is shown that this oscillator system contains
the essential features of Wigner's little groups dictating the internal
space-time sy... | 1406.2403v1 |
2014-06-11 | Quantum critical metals in $4-ε$ dimensions | We study the quantum theory of a Fermi surface coupled to a gapless boson
scalar in $D=4-\epsilon$ spacetime dimensions as a simple model for non-Fermi
liquids (NFL) near a quantum phase transition. Our analysis takes into account
the full backreaction from Landau damping of the boson, and obtains an RG flow
that proce... | 1406.3029v2 |
2014-10-15 | A comparison of weak-turbulence and PIC simulations of weak electron-beam plasma interaction | Quasilinear theory has long been used to treat the problem of a weak electron
beam interacting with plasma and generating Langmuir waves. Its extension to
weak-turbulence theory treats resonant interactions of these Langmuir waves
with other plasma wave modes, in particular ion-sound waves. These are strongly
damped in... | 1410.4046v2 |
2015-03-31 | Existence of the global attractor for the plate equation with nonlocal nonlinearity in R^{n} | We consider Cauchy problem for the semilinear plate equation with nonlocal
nonlinearity. Under mild conditions on the damping coefficient, we prove that
the semigroup generated by this problem possesses a global attractor. | 1503.09123v1 |
2015-05-07 | Theory for Bose-Einstein condensation of light in nano-fabricated semiconductor microcavities | We construct a theory for Bose-Einstein condensation of light in
nano-fabricated semiconductor microcavities. We model the semiconductor by one
conduction and one valence band which consist of electrons and holes that
interact via a Coulomb interaction. Moreover, we incorporate screening effects
by using a contact inte... | 1505.01732v2 |
2015-08-21 | Which verification qubits perform best for secure communication in noisy channel? | In secure quantum communication protocols, a set of single qubits prepared
using 2 or more mutually unbiased bases or a set of $n$-qubit ($n\geq2$)
entangled states of a particular form are usually used to form a verification
string which is subsequently used to detect traces of eavesdropping. The qubits
that form a ve... | 1508.05237v1 |
2015-08-30 | Spin-transfer torque based damping control of parametrically excited spin waves in a magnetic insulator | The damping of spin waves parametrically excited in the magnetic insulator
Yttrium Iron Garnet (YIG) is controlled by a dc current passed through an
adjacent normal-metal film. The experiment is performed on a macroscopically
sized YIG(100nm)/Pt(10nm) bilayer of 4x2 mm^2 lateral dimensions. The spin-wave
relaxation fre... | 1508.07517v1 |
2015-09-08 | Model comparison for the density structure across solar coronal waveguides | The spatial variation of physical quantities, such as the mass density,
across solar atmospheric waveguides governs the timescales and spatial scales
for wave damping and energy dissipation. The direct measurement of the spatial
distribution of density, however, is difficult and indirect seismology
inversion methods ha... | 1509.02340v1 |
2015-09-15 | Resonance vibration of impact oscillator with biharmonic excitation | We consider a damped impact oscillator subject to the action of a biharmonic
force. The conditions for the existence and stability of almost periodic
resonance solutions are investigated. | 1509.05381v1 |
2015-11-08 | On 2d incompressible Euler equations with partial damping | We consider various questions about the 2d incompressible Navier-Stokes and
Euler equations on a torus when dissipation is removed from or added to some of
the Fourier modes. | 1511.02530v1 |
2015-12-11 | The Ping Pong Pendulum | Many damped mechanical systems oscillate with increasing frequency as the
amplitude decreases. One popular example is Euler's Disk, where the point of
contact rotates with increasing rapidity as the energy is dissipated. We study
a simple mechanical pendulum that exhibits this behaviour. | 1512.03700v1 |
2016-01-26 | Fast convex optimization via inertial dynamics with Hessian driven damping | We first study the fast minimization properties of the trajectories of the
second-order evolution equation $$\ddot{x}(t) + \frac{\alpha}{t} \dot{x}(t) +
\beta \nabla^2 \Phi (x(t))\dot{x} (t) + \nabla \Phi (x(t)) = 0,$$ where
$\Phi:\mathcal H\to\mathbb R$ is a smooth convex function acting on a real
Hilbert space $\math... | 1601.07113v1 |
2016-03-28 | Stabilization of gravity water waves | This paper is devoted to the stabilization of the incompressible Euler
equation with free surface. We study the damping of two-dimensional gravity
waves by an absorbing beach where the water-wave energy is dissipated by using
the variations of the external pressure. | 1603.08541v1 |
2016-06-14 | Precession Relaxation of Viscoelastic Oblate Rotators | Perturbations of all sorts destabilise the rotation of a small body and leave
it in a non-principal spin state. In such a state, the body experiences
alternating stresses generated by the inertial forces. This yields nutation
relaxation, i.e., evolution of the spin towards the principal rotation about
the maximal-inert... | 1606.04559v3 |
2016-09-07 | Quasi-stability and Exponential Attractors for A Non-Gradient System---Applications to Piston-Theoretic Plates with Internal Damping | We consider a nonlinear (Berger or Von Karman) clamped plate model with a
{\em piston-theoretic} right hand side---which include non-dissipative,
non-conservative lower order terms. The model arises in aeroelasticity when a
panel is immersed in a high velocity linear potential flow; in this case the
effect of the flow ... | 1609.02211v1 |
2016-10-26 | On the region of attraction of phase-locked states for swing equations on connected graphs with inhomogeneous dampings | We consider the synchronization problem of swing equations, a second-order
Kuramoto-type model, on connected networks with inhomogeneous dampings. This
was largely motivated by its relevance to the dynamics of power grids. We focus
on the estimate of the region of attraction of synchronous states which is a
central pro... | 1610.08437v1 |
2016-10-31 | A quest for new physics inside the neutron | The lecture presents an overview of the quest for the new physics in low
energy neutron phenomena. In addition to the traditional topics the quantum
damping of $n$ $\bar{n}$ oscillations is discussed. | 1610.10046v1 |
2016-11-28 | First Demonstration of Electrostatic Damping of Parametric Instability at Advanced LIGO | Interferometric gravitational wave detectors operate with high optical power
in their arms in order to achieve high shot-noise limited strain sensitivity. A
significant limitation to increasing the optical power is the phenomenon of
three-mode parametric instabilities, in which the laser field in the arm
cavities is sc... | 1611.08997v1 |
2016-12-19 | Improving the efficiency of joint remote state preparation in noisy environment with weak measurement | Quantum secure communication provides a new way for protecting the security
of information. As an important component of quantum secure communication,
remote state preparation (RSP) can securely transmit a quantum state from a
sender to a remote receiver. The existence of quantum noise severely affects
the security and... | 1612.06020v1 |
2017-03-21 | Evidence for structural damping in a high-stress silicon nitride nanobeam and its implications for quantum optomechanics | We resolve the thermal motion of a high-stress silicon nitride nanobeam at
frequencies far below its fundamental flexural resonance (3.4 MHz) using
cavity-enhanced optical interferometry. Over two decades, the displacement
spectrum is well-modeled by that of a damped harmonic oscillator driven by a
$1/f$ thermal force,... | 1703.07134v2 |
2017-03-29 | Comment on "Spreading widths of giant resonances in spherical nuclei: damped transient response" by Severyukhin et al. [arXiv:1703.05710] | We argue whether physics of universal approach of Severyukhin et al.
[arXiv:1703.05710] is approved. | 1703.10003v1 |
2017-05-16 | Propagation of transition fronts in nonlinear chains with non-degenerate on-site potentials | We address the problem of a front propagation in chains with a bi-stable
nondegenerate on-site potential and a nonlinear gradient coupling. For a
generic nonlinear coupling, one encounters a special regime of transitions,
characterized by extremely narrow fronts, far supersonic velocities of
propagation and long waves ... | 1705.05555v1 |
2017-08-16 | The Frequency-dependent Damping of Slow Magnetoacoustic Waves in a Sunspot Umbral Atmosphere | High spatial and temporal resolution images of a sunspot, obtained
simultaneously in multiple optical and UV wavelengths, are employed to study
the propagation and damping characteristics of slow magnetoacoustic waves up to
transition region heights. Power spectra are generated from intensity
oscillations in sunspot um... | 1708.04835v1 |
2017-08-29 | Spin wave damping arising from phase coexistence below $T_c$ in colossal magnetoresistive La$_{0.7}$Ca$_{0.3}$MnO$_3$ | While the spin dynamics of La$_{0.7}$Ca$_{0.3}$MnO$_3$ in the ferromagnetic
phase are known to be unconventional, previous measurements have yielded
contradictory results regarding the damping of spin wave excitations. Neutron
spectroscopy measurements on a sample with a transition temperature of
$T_c$=257 K, higher th... | 1708.08960v2 |
2017-09-08 | Topological and Graph-coloring Conditions on the Parameter-independent Stability of Second-order Networked Systems | In this paper, we study parameter-independent stability in qualitatively
heterogeneous passive networked systems containing damped and undamped nodes.
Given the graph topology and a set of damped nodes, we ask if output consensus
is achieved for all system parameter values. For given parameter values, an
eigenspace ana... | 1709.02629v1 |
2017-10-11 | Collisional damping rates for plasma waves | The distinction between the plasma dynamics dominated by collisional
transport versus collective processes has never been rigorously addressed until
recently. A recent paper [Yoon et al., Phys. Rev. E 93, 033203 (2016)]
formulates for the first time, a unified kinetic theory in which collective
processes and collisiona... | 1710.03874v1 |
2017-10-20 | Tidal dissipation in rotating fluid bodies: the presence of a magnetic field | We investigate effects of the presence of a magnetic field on tidal
dissipation in rotating fluid bodies. We consider a simplified model consisting
of a rigid core and a fluid envelope, permeated by a background magnetic field
(either a dipolar field or a uniform axial field). The wavelike tidal responses
in the fluid ... | 1710.07690v2 |
2017-11-30 | Implications of dark matter cascade decay from DAMPE, HESS, Fermi-LAT and AMS02 data | Recent high-energy cosmic $e^\pm$ measurement from the DArk Matter Particle
Explorer (DAMPE) satellite confirms the deviation of total cosmic ray electron
spectrum above 700-900 GeV from a simple power law. In this paper we
demonstrate that the cascade decay of dark matter (DM) can account for DAMPE's
TeV $e^+e^-$ spec... | 1712.00370v3 |
2017-12-04 | Scalar dark matter, Type II Seesaw and the DAMPE cosmic ray $e^+ + e^-$ excess | The DArk Matter Particle Explorer (DAMPE) has reported a measurement of the
flux of high energy cosmic ray electrons plus positrons (CREs) in the energy
range between $25$ GeV and $4.6$ TeV. With unprecedented high energy
resolution, the DAMPE data exhibit an excess of the CREs flux at an energy of
around $1.4$ TeV. In... | 1712.00869v2 |
2017-12-07 | Nonlinear growth of structure in cosmologies with damped matter fluctuations | We investigate the nonlinear evolution of structure in variants of the
standard cosmological model which display damped density fluctuations relative
to cold dark matter (e.g. in which cold dark matter is replaced by warm or
interacting DM). Using N-body simulations, we address the question of how much
information is r... | 1712.02742v2 |
2017-12-11 | DAMPE excess from decaying right-handed neutrino dark matter | The flux of high-energy cosmic-ray electrons plus positrons recently measured
by the DArk Matter Particle Explorer (DAMPE) exhibits a tentative peak excess
at an energy of around $1.4$ TeV. In this paper, we consider the minimal gauged
$U(1)_{B-L}$ model with a right-handed neutrino (RHN) dark matter (DM) and
interpret... | 1712.03652v3 |
2017-12-11 | A Statistical Study on The Frequency-Dependent Damping of Slow-mode Waves in Polar Plumes and Interplumes | We perform a statistical study on the frequency-dependent damping of slow
waves propagating along polar plumes and interplumes in the solar corona.
Analysis of a large sample of extreme ultraviolet (EUV) imaging data with high
spatial and temporal resolutions obtained from AIA/SDO suggests an inverse
power-law dependen... | 1712.03673v1 |
2018-02-18 | On energy stable discontinuous Galerkin spectral element approximations of the perfectly matched layer for the wave equation | We develop a provably energy stable discontinuous Galerkin spectral element
method (DGSEM) approximation of the perfectly matched layer (PML) for the three
and two space dimensional (3D and 2D) linear acoustic wave equations, in first
order form, subject to well-posed linear boundary conditions. First, using the
well-k... | 1802.06388v1 |
2018-08-05 | Dispersion, damping, and intensity of spin excitations in the single-layer (Bi,Pb)$_{2}$(Sr,La)$_{2}$CuO$_{6+δ}$ cuprate superconductor family | Using Cu-$L_3$ edge resonant inelastic x-ray scattering (RIXS) we measured
the dispersion and damping of spin excitations (magnons and paramagnons) in the
high-$T_\mathrm{c}$ superconductor (Bi,Pb)$_{2}$(Sr,La)$_{2}$CuO$_{6+\delta}$
(Bi2201), for a large doping range across the phase diagram ($0.03\lesssim
p\lesssim0.2... | 1808.01682v1 |
2018-09-19 | Critical exponent for the semilinear wave equations with a damping increasing in the far field | We consider the Cauchy problem of the semilinear wave equation with a damping
term \begin{align*}
u_{tt} - \Delta u + c(t,x) u_t = |u|^p, \quad (t,x)\in (0,\infty)\times
\mathbb{R}^N,\quad
u(0,x) = \varepsilon u_0(x), \ u_t(0,x) = \varepsilon u_1(x), \quad x\in
\mathbb{R}^N, \end{align*} where $p>1$ and the coeffic... | 1809.06994v1 |
2018-10-16 | Dark matter gets DAMPE | The DArk Matter Particle Explorer (DAMPE) recently reported an excess of
electrons/positrons above expected background fluxes even when a double
power-law background spectrum is assumed. Several dark matter models that
involve TeV-scale leptophilic WIMPs have been suggested in the literature to
account for this excess.... | 1810.07176v2 |
2018-11-15 | Damping rate of a fermion in ultradegenerate chiral matter | We compute the damping rate of a fermion propagating in a chiral plasma when
there is an imbalance between the densities of left- and right-handed fermions,
after generalizing the hard thermal loop resummation techniques for these
systems. In the ultradegenerate limit, for very high energies the damping rate
of this ex... | 1811.06394v3 |
2018-12-16 | Nonlinear Dynamics of Spherical Shells Buckling under Step Pressure | Dynamic buckling is addressed for complete elastic spherical shells subject
to a rapidly applied step in external pressure. Insights from the perspective
of nonlinear dynamics reveal essential mathematical features of the buckling
phenomena. To capture the strong buckling imperfection-sensitivity, initial
geometric imp... | 1812.06526v2 |
2019-01-09 | Turbulent dynamo in a weakly ionized medium | The small-scale turbulent dynamo is an important process contributing to the
cosmic magnetization. In partially ionized astrophysical plasmas, the dynamo
growth of magnetic energy strongly depends on the coupling state between ions
and neutrals and the ion-neutral collisional damping effect. A new damping
stage of turb... | 1901.02893v1 |
2019-01-25 | Quantum speed limit time for correlated quantum channel | Memory effects play a fundamental role in the dynamics of open quantum
systems. There exist two different views on memory for quantum noises. In the
first view, the quantum channel has memory when there exist correlations
between successive uses of the channels on a sequence of quantum systems. These
types of channels ... | 1901.08917v4 |
2019-02-17 | Finite-size effects on sound damping in stable computer glasses | In this brief note we comment on the recent results presented in
arXiv:1812.08736v1 | 1902.06225v1 |
2019-05-04 | A class of second-order geometric quasilinear hyperbolic PDEs and their application in imaging science | In this paper, we study damped second-order dynamics, which are quasilinear
hyperbolic partial differential equations (PDEs). This is inspired by the
recent development of second-order damping systems for accelerating energy
decay of gradient flows. We concentrate on two equations: one is a damped
second-order total va... | 1905.01457v2 |
2019-07-08 | Single-spectrum prediction of kurtosis of water waves in a non-conservative model | We study statistical properties after a sudden episode of wind for water
waves propagating in one direction. A wave with random initial conditions is
propagated using a forced-damped higher order Nonlinear Schr\"odinger equation
(NLS). During the wind episode, the wave action increases, the spectrum
broadens, the spect... | 1907.03490v1 |
2019-08-20 | Synthetic Extreme-ultraviolet Emissions Modulated by Leaky Fast Sausage Modes in Solar Active Region Loops | We study the extreme-ultraviolet (EUV) emissions modulated by leaky fast
sausage modes (FSMs) in solar active region loops and examine their
observational signatures via spectrometers like EIS. After computing fluid
variables of leaky FSMs with MHD simulations, we forward-model the intensity
and spectral properties of ... | 1908.07131v1 |
2019-10-24 | Frequency criteria for exponential stability | We discuss some frequency-domain criteria for the exponential stability of
nonlinear feedback systems based on dissipativity theory. Applications are
given to convergence rates for certain perturbations of the damped harmonic
oscillator. | 1910.10855v2 |
2019-11-05 | IW And-Type State in IM Eridani | IW And stars are a recently recognized group of dwarf novae which are
characterized by a repeated sequence of brightening from a standstill-like
phase with damping oscillations followed by a deep dip. Kimura et al. (2019)
recently proposed a model based on thermal-viscous disk instability in a tilted
disk to reproduce ... | 1911.01587v1 |
2019-11-28 | Magnon damping in the zigzag phase of the Kitaev-Heisenberg-$Γ$ model on a honeycomb lattice | We calculate magnon dispersions and damping in the Kitaev-Heisenberg model
with an off-diagonal exchange $\Gamma$ and isotropic third-nearest-neighbor
interaction $J_3$ on a honeycomb lattice. This model is relevant to a
description of the magnetic properties of iridium oxides $\alpha$-Li$_2$IrO$_3$
and Na$_2$IrO$_3$, ... | 1911.12829v2 |
2019-12-10 | A Stochastic Quasi-Newton Method for Large-Scale Nonconvex Optimization with Applications | This paper proposes a novel stochastic version of damped and regularized BFGS
method for addressing the above problems. | 1912.04456v1 |
2019-12-27 | Ultralow mechanical damping with Meissner-levitated ferromagnetic microparticles | Levitated nanoparticles and microparticles are excellent candidates for the
realization of extremely isolated mechanical systems, with a huge potential
impact in sensing applications and in quantum physics. Magnetic levitation
based on static fields is a particularly interesting approach, due to the
unique property of ... | 1912.12252v3 |
2020-01-22 | Wide Area Measurement System-based Low Frequency Oscillation Damping Control through Reinforcement Learning | Ensuring the stability of power systems is gaining more attraction today than
ever before, due to the rapid growth of uncertainties in load and renewable
energy penetration. Lately, wide area measurement system-based centralized
controlling techniques started providing a more flexible and robust control to
keep the sys... | 2001.07829v1 |
2020-02-13 | Semi-realistic tight-binding model for spin-orbit torques | We compute the spin-orbit torque in a transition metal heterostructure using
Slater-Koster parameterization in the two-center tight-binding approximation
and accounting for d-orbitals only. In this method, the spin-orbit coupling is
modeled within Russel-Saunders scheme, which enables us to treat interfacial
and bulk s... | 2002.05533v1 |
2020-02-14 | One-dimensional wave equation with set-valued boundary damping: well-posedness, asymptotic stability, and decay rates | This paper is concerned with the analysis of a one dimensional wave equation
$z_{tt}-z_{xx}=0$ on $[0,1]$ with a Dirichlet condition at $x=0$ and a damping
acting at $x=1$ which takes the form $(z_t(t,1),-z_x(t,1))\in\Sigma$ for every
$t\geq 0$, where $\Sigma$ is a given subset of $\mathbb R^2$. The study is
performed ... | 2002.06186v3 |
2020-03-30 | Optimal absorption of acoustical waves by a boundary | In the aim to find the simplest and most efficient shape of a noise absorbing
wall to dissipate the acoustical energy of a sound wave, we consider a
frequency model described by the Helmholtz equation with a damping on the
boundary. The well-posedness of the model is shown in a class of domains with
d-set boundaries (N... | 2003.13250v2 |
2020-04-24 | Suppression of the longitudinal coupled bunch instability in DA$Φ$NE in collisions with a crossing angle | In DAFNE, the Frascati $e^+e^-$ collider operating since 1998, an innovative
collision scheme, the crab waist, has been successfully implemented during the
years 2008-09. During operations for the Siddharta experiment an unusual
synchrotron oscillation damping effect induced by beam-beam collisions has been
observed. I... | 2004.11902v1 |
2020-05-08 | Separatrix crossing and symmetry breaking in NLSE-like systems due to forcing and damping | We theoretically and experimentally examine the effect of forcing and damping
on systems that can be described by the nonlinear Schr\"odinger equation
(NLSE), by making use of the phase-space predictions of the three-wave
truncation of the spectrum. In the latter, only the fundamental frequency and
the upper and lower ... | 2005.03931v1 |
2020-05-13 | Damping of a micro-electromechanical oscillator in turbulent superfluid $^4$He: A novel probe of quantized vorticity in the ultra-low temperature regime | We report a comprehensive investigation of the effects of quantum turbulence
and quantized vorticity in superfluid $^4$He on the motion of a
micro-electromechanical systems (MEMS) resonator. We find that the MEMS is
uniquely sensitive to quantum turbulence present in the fluid. To generate
turbulence in the fluid, a qu... | 2005.06570v1 |
2020-06-10 | Online PMU-Based Wide-Area Damping Control for Multiple Inter-Area Modes | This paper presents a new phasor measurement unit (PMU)-based wide-area
damping control (WADC) method to suppress the critical inter-area modes of
large-scale power systems. Modal participation factors, estimated by a
practically model-free system identification approach, are used to select the
most suitable synchronou... | 2006.05651v1 |
2020-06-14 | A general formulation for the magnetic oscillations in two dimensional systems | We develop a general formalism for the magnetic oscillations (MO) in two
dimensional (2D) systems. We consider general 2D Landau levels, which may
depend on other variable or indices, besides the perpendicular magnetic field.
In the ground state, we obtain expressions for the MO phase and amplitude. From
this we use a ... | 2006.07944v2 |
2020-07-19 | Global existence and convergence to the modified Barenblatt solution for the compressible Euler equations with physical vacuum and time-dependent damping | In this paper, the smooth solution of the physical vacuum problem for the one
dimensional compressible Euler equations with time-dependent damping is
considered. Near the vacuum boundary, the sound speed is $C^{1/2}$-H\"{o}lder
continuous. The coefficient of the damping depends on time, given by this form
$\frac{\mu}{(... | 2007.14802v2 |
2020-08-03 | Improvement on the blow-up of the wave equation with the scale-invariant damping and combined nonlinearities | We consider in this article the damped wave equation, in the
\textit{scale-invariant case} with combined two nonlinearities, which reads as
follows: \begin{displaymath} \d (E) \hspace{1cm} u_{tt}-\Delta
u+\frac{\mu}{1+t}u_t=|u_t|^p+|u|^q, \quad \mbox{in}\ \R^N\times[0,\infty),
\end{displaymath} with small initial data.... | 2008.02109v3 |
2020-08-26 | Quantum Lifshitz points and fluctuation-induced first-order phase transitions in imbalanced Fermi mixtures | We perform a detailed analysis of the phase transition between the uniform
superfluid and normal phases in spin- and mass-imbalanced Fermi mixtures. At
mean-field level we demonstrate that at temperature $T\to 0$ the gradient term
in the effective action can be tuned to zero for experimentally relevant sets
of paramete... | 2008.11782v1 |
2020-09-10 | Electron Landau Damping of Kinetic Alfvén Waves in Simulated Magnetosheath Turbulence | Turbulence is thought to play a role in the heating of the solar wind plasma,
though many questions remain to be solved regarding the exact nature of the
mechanisms driving this process in the heliosphere. In particular, the physics
of the collisionless interactions between particles and turbulent
electromagnetic field... | 2009.05010v1 |
2020-11-09 | Plasmon energy losses in shear bands of metallic glass | Shear bands resulting from plastic deformation in cold-rolled
Al$_{88}$Y$_{7}$Fe$_{5}$ metallic glass were observed to display alternating
density changes along their propagation direction. Electron-energy loss
spectroscopy (EELS) was used to investigate the volume plasmon energy losses in
and around shear bands. Energ... | 2011.04396v3 |
2020-11-16 | Thresholds for loss of Landau damping in longitudinal plane | Landau damping mechanism plays a crucial role in providing single-bunch
stability in LHC, High-Luminosity LHC, other existing as well as previous and
future (like FCC) circular hadron accelerators. In this paper, the thresholds
for the loss of Landau damping (LLD) in the longitudinal plane are derived
analytically usin... | 2011.07985v1 |
2020-12-04 | Quantum Circuits for Collective Amplitude Damping in Two-Qubit Systems | Quantum computers have now appeared in our society and are utilized for the
investigation of science and engineering. At present, they have been built as
intermediate-size computers containing about fifty qubits and are weak against
noise effects. Hence, they are called noisy-intermediate scale quantum devices.
In orde... | 2012.02410v1 |
2020-12-10 | Dimensional analysis of spring-wing systems reveals performance metrics for resonant flapping-wing flight | Flapping-wing insects, birds, and robots are thought to offset the high power
cost of oscillatory wing motion by using elastic elements for energy storage
and return. Insects possess highly resilient elastic regions in their flight
anatomy that may enable high dynamic efficiency. However, recent experiments
highlight l... | 2012.05428v1 |
2021-01-22 | Measurements and analysis of response function of cold atoms in optical molasses | We report our experimental measurements and theoretical analysis of the
position response function of a cloud of cold atoms residing in the viscous
medium of an optical molasses and confined by a magneto-optical trap (MOT). We
measure the position response function by applying a transient homogeneous
magnetic field as ... | 2101.09118v2 |
2021-03-11 | Nontrivial damping of quantum many-body dynamics | Understanding how the dynamics of a given quantum system with many degrees of
freedom is altered by the presence of a generic perturbation is a notoriously
difficult question. Recent works predict that, in the overwhelming majority of
cases, the unperturbed dynamics is just damped by a simple function, e.g.,
exponentia... | 2103.06646v2 |
2021-03-24 | Multimode piezoelectric shunt damping of thin plates with arrays of separately shunted patches, method, and experimental validation | Two-dimensional thin plates are widely used in many applications. Shunt
damping is a promising way for the attenuation of vibration of these
electromechanical systems. It enables a compact vibration damping method
without adding significant mass and volumetric occupancy. Analyzing the
dynamics of such electromechanical... | 2103.13179v1 |
2021-03-29 | Nonequilibrium Dynamics of the Chiral Quark Condensate under a Strong Magnetic Field | Strong magnetic fields impact quantum-chromodynamics (QCD) properties in
several situations; examples include the early universe, magnetars, and
heavy-ion collisions. These examples share a common trait: time evolution. A
prominent QCD property impacted by a strong magnetic field is the quark
condensate, an approximate... | 2103.15665v1 |
2021-04-09 | Taming the pinch singularities in the two-loop neutrino self-energy in a medium | We consider the calculation of the thermal self-energy of a neutrino that
propagates in a medium composed of fermions and scalars interacting via a
Yukawa-type coupling, in the case that the neutri no energy is much larger than
the fermion and scalar masses, as well as the temperature and chemical
potentials of the bac... | 2104.04459v2 |
2021-06-20 | Life-cycle assessment for flutter probability of a long-span suspension bridge based on field monitoring data | Assessment of structural safety status is of paramount importance for
existing bridges, where accurate evaluation of flutter probability is essential
for long-span bridges. In current engineering practice, at the design stage,
flutter critical wind speed is usually estimated by the wind tunnel test, which
is sensitive ... | 2106.10694v1 |
2021-07-17 | Theoretical and numerical study of vibrational resonance in a damped softening Duffing oscillator | We study the possibility of occurrence of vibrational resonance in a
softening Duffing oscillator in the underdamped and overdamped cases both
theoretically as well as numerically. The oscillator is driven by two periodic
forces. Numerically we find that in the underdamped case two oscillatory
solutions are obtained in... | 2107.08302v1 |
2021-07-28 | Optimal gamma-ray selections for monochromatic line searches with DAMPE | The DArk Matter Particle Explorer (DAMPE) is a space high-energy cosmic-ray
detector covering a wide energy band with a high energy resolution. One of the
key scientific goals of DAMPE is to carry out indirect detection of dark matter
by searching for high-energy gamma-ray line structure. To promote the
sensitivity of ... | 2107.13208v2 |
2021-07-28 | Magnetic field induced asymmetric splitting of the output signal | In this paper we have investigated the dynamics of a damped harmonic
oscillator in the presence of an electromagnetic field. The transients for the
two dimensional harmonic oscillator imply about the modulation of the frequency
of the oscillator by the velocity dependent non conservative force from an
applied magnetic ... | 2107.13305v1 |
2021-07-28 | Evolution of a Mode of Oscillation Within Turbulent Accretion Disks | We investigate the effects of subsonic turbulence on a normal mode of
oscillation [a possible origin of the high-frequency quasi-periodic
oscillations (HFQPOs) within some black hole accretion disks]. We consider
perturbations of a time-dependent background (steady state disk plus
turbulence), obtaining an oscillator e... | 2107.13546v1 |
2021-07-31 | Oscillating scalar dissipating in a medium | We study how oscillations of a scalar field condensate are damped due to
dissipative effects in a thermal medium. Our starting point is a non-linear and
non-local condensate equation of motion descending from a 2PI-resummed
effective action derived in the Schwinger-Keldysh formalism appropriate for
non-equilibrium quan... | 2108.00254v1 |
2021-08-02 | Large-amplitude longitudinal oscillations in solar prominences simulated with different resolutions | Large-amplitude longitudinal oscillations (LALOs) in solar prominences have
been widely studied in the last decades. However, their damping and
amplification mechanisms are not well understood. In this study, we investigate
the attenuation and amplification of LALOs using high-resolution numerical
simulations with prog... | 2108.01143v1 |
2021-08-05 | Complexity analysis of quantum teleportation via different entangled channels in the presence of noise | Quantum communication is one of the hot topics in quantum computing, where
teleportation of a quantum state has a slight edge and gained significant
attention from researchers. A large number of teleportation schemes have
already been introduced so far. Here, we compare the teleportation of a single
qubit message among... | 2108.02641v1 |
2021-08-06 | Noncontact friction: Role of phonon damping and its nonuniversality | While obtaining theoretical predictions for dissipation during sliding motion
is a difficult task, one regime that allows for analytical results is the
so-called noncontact regime, where a probe is weakly interacting with the
surface over which it moves. Studying this regime for a model crystal, we
extend previously ob... | 2108.03025v3 |
2021-09-14 | Design of a HOM-Damped 166.6 MHz Compact Quarter-Wave beta=1 Superconducting Cavity for High Energy Photon Source | Superconducting cavities with low RF frequencies and heavy damping of higher
order modes (HOM) are desired for the main accelerator of High Energy Photon
Source (HEPS), a 6 GeV synchrotron light source promising ultralow emittance
currently under construction in Beijing. A compact 166.6 MHz superconducting
cavity was p... | 2109.06560v1 |
2021-11-13 | Effects of microplastics and surfactants on surface roughness of water waves | In this paper, we study the flow physics underlying the recently developed
remote sensing capability of detecting oceanic microplastics, which is based on
the measurable surface roughness reduction induced by the presence of
microplastics on the ocean surface. In particular, we are interested in whether
this roughness ... | 2111.07021v1 |
2021-11-15 | Convergence Analysis of A Second-order Accurate, Linear Numerical Scheme for The Landau-Lifshitz Equation with Large Damping Parameters | A second order accurate, linear numerical method is analyzed for the
Landau-Lifshitz equation with large damping parameters. This equation describes
the dynamics of magnetization, with a non-convexity constraint of unit length
of the magnetization. The numerical method is based on the second-order
backward differentiat... | 2111.07537v1 |
2021-11-17 | United Nation Security Council in Quantum World: Experimental Realization of Quantum Anonymous Veto Protocols using IBM Quantum Computer | United Nation (UN) security council has fifteen members, out of which five
permanent members of the council can use their veto power against any
unfavorable decision taken by the council. In certain situation, a member using
right to veto may prefer to remain anonymous. This need leads to the
requirement of the protoco... | 2111.09028v1 |
2021-12-03 | The Importance of Electron Landau Damping for the Dissipation of Turbulent Energy in Terrestrial Magnetosheath Plasma | Heliospheric plasma turbulence plays a key role in transferring the energy of
large-scale magnetic field and plasma flow fluctuations to smaller scales where
the energy can be dissipated, ultimately leading to plasma heating.
High-quality measurements of electromagnetic fields and electron velocity
distributions by the... | 2112.02171v1 |
2022-01-01 | Extremely strong DLAs at high redshift: Gas cooling and H$_2$ formation | We present a spectroscopic investigation with VLT/X-shooter of seven
candidate extremely strong damped Lyman-$\alpha$ absorption systems (ESDLAs,
$N(\text{HI})\ge 5\times 10^{21}$ cm$^{-2}$) observed along quasar sightlines.
We confirm the extremely high column densities, albeit slightly (0.1~dex) lower
than the origin... | 2201.00245v1 |
2022-01-05 | Stability of the discrete time-crystalline order in spin-optomechanical and open cavity QED systems | Discrete time crystals (DTC) have been demonstrated experimentally in several
different quantum systems in the past few years. Spin couplings and cavity
losses have been shown to play crucial roles for realizing DTC order in open
many-body systems out of equilibrium. Recently, it has been proposed that
eternal and tran... | 2201.01568v2 |
2022-01-20 | Sharp resolvent estimate for the Baouendi-Grushin operator and applications | In this article we study the semiclassical resolvent estimate for the
non-selfadjoint Baouendi-Grushin operator on the two-dimensional torus
$\mathbb{T}^2=\mathbb{R}^2/(2\pi\mathbb{Z})^2$ with H\"older dampings. The
operator is subelliptic degenerating along the vertical direction at $x=0$. We
exhibit three different s... | 2201.08189v2 |
2022-02-24 | Coherence of ion cyclotron resonance for damping ion cyclotron waves in space plasmas | Ion cyclotron resonance is one of the fundamental energy conversion processes
through field-particle interaction in collisionless plasmas. However, the key
evidence for ion cyclotron resonance (i.e., the coherence between
electromagnetic fields and the ion phase space density) and the resulting
damping of ion cyclotron... | 2202.11967v1 |
2022-03-15 | Search for gamma-ray line signals around the black hole at the galactic center with DAMPE observation | The adiabatic growth of a black hole (BH) may enhance the dark matter (DM)
density surrounding it, causing a spike in the DM density profile. The spike
around the supermassive BH at the center of the Milky Way may lead to a
dramatic enhancement of the gamma-ray flux of DM annihilation from the galactic
center (GC). In ... | 2203.08078v1 |
2022-03-15 | Optimal Damping with Hierarchical Adaptive Quadrature for Efficient Fourier Pricing of Multi-Asset Options in Lévy Models | Efficiently pricing multi-asset options is a challenging problem in
quantitative finance. When the characteristic function is available,
Fourier-based methods are competitive compared to alternative techniques
because the integrand in the frequency space often has a higher regularity than
that in the physical space. Ho... | 2203.08196v4 |
2022-03-25 | Nonlinear damped spatially periodic breathers and the emergence of soliton-like rogue waves | The spatially periodic breather solutions (SPBs) of the nonlinear
Schr\"odinger equation, prominent in modeling rogue waves, are unstable. In
this paper we numerically investigate the effects of nonlinear dissipation and
higher order nonlinearities on the routes to stability of the SPBs in the
framework of the nonlinea... | 2203.13488v2 |
2022-03-25 | Investigating the effect of noise channels on the quality of unitary t-designs | Unitary t-designs have a wide variety of applications in quantum information
theory, such as quantum data encryption and randomised benchmarking. However,
experimental realisations of t-designs are subject to noise. Here we
investigate the effect of noise channels on the quality of single-qubit
t-designs. The noise cha... | 2203.13771v2 |
2022-04-25 | Geometrical aspects of contact mechanical systems and field theories | Many important theories in modern physics can be stated using differential
geometry. Symplectic geometry is the natural framework to deal with autonomous
Hamiltonian mechanics. This admits several generalizations for nonautonomous
systems, both regular and singular. Some of these extensions are the subject of
this thes... | 2204.11537v1 |
2022-06-20 | Swinging a playground swing: torque controls for inducing sustained oscillations | Models of a playground swing have been studied since the 1960s. However, in
most of them, the position of the swinger is controlled directly. This
simplifies the problem but hides the mechanics of torques applied to keep the
swing moving in a regular pattern. This article studies these mechanics. Two
models of a swing ... | 2206.09579v1 |
2022-07-01 | Frequency beating and damping of breathing oscillations of a harmonically trapped one-dimensional quasicondensate | We study the breathing (monopole) oscillations and their damping in a
harmonically trapped one-dimensional (1D) Bose gas in the quasicondensate
regime using a finite-temperature classical field approach. By characterising
the oscillations via the dynamics of the density profile's rms width over long
time, we find that ... | 2207.00209v2 |
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