publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2021-04-15 | Flexural wave modulation and mitigation in airfoils using acoustic black holes | This study introduces a framework for the design and implementation of
acoustic black holes (ABHs) in airfoils. A generalized multi-parameter
damped-ABH generation function is mapped onto NACA series airfoils.
Representative geometries and a uniformly distributed baseline, all with the
same mass of structure and dampin... | 2104.07374v1 |
2021-04-20 | Entanglement robustness via spatial deformation of identical particle wave functions | We address the problem of entanglement protection against surrounding noise
by a procedure suitably exploiting spatial indistinguishability of identical
subsystems. To this purpose, we take two initially separated and entangled
identical qubits interacting with two independent noisy environments. Three
typical models o... | 2104.09714v1 |
2021-04-22 | Dissipation and fluctuations in elongated bosonic Josephson junctions | We investigate the dynamics of bosonic atoms in elongated Josephson
junctions. We find that these systems are characterized by an intrinsic
coupling between the Josephson mode of macroscopic quantum tunneling and the
sound modes. This coupling of Josephson and sound modes gives rise to a damped
and stochastic Langevin ... | 2104.11259v2 |
2021-04-24 | The large-period limit for equations of discrete turbulence | We consider the damped/driven cubic NLS equation on the torus of a large
period $L$ with a small nonlinearity of size $\lambda$, a properly scaled
random forcing and dissipation. We examine its solutions under the subsequent
limit when first $\lambda\to 0$ and then $L\to \infty$. The first limit, called
the limit of di... | 2104.11967v2 |
2021-05-13 | Global Solutions of Three-dimensional Inviscid MHD Fluids with Velocity Damping in Horizontally Periodic Domains | The \emph{two-dimensional} (2D) existence result of global(-in-time)
solutions for the motion equations of incompressible, inviscid, non-resistive
magnetohydrodynamic (MHD) fluids with velocity damping had been established in
[Wu--Wu--Xu, SIAM J. Math. Anal. 47 (2013), 2630--2656]. This paper further
studies the existe... | 2105.06080v1 |
2021-05-13 | On Inhibition of Rayleigh--Taylor Instability by Horizontal Magnetic Field in an Inviscid MHD Fluid with Velocity Damping | It is still an open problem whether the inhibition phenomenon of
Rayleigh--Taylor (RT) instability by horizontal magnetic field can be
mathematically proved in a non-resistive magnetohydrodynamic (MHD) fluid in a
two-dimensional (2D) horizontal slab domain, since it had been roughly verified
by a 2D linearized motion e... | 2105.06472v1 |
2021-05-14 | Quantum Langevin dynamics of a charged particle in a magnetic field : Response function, position-velocity and velocity autocorrelation functions | We use the Quantum Langevin equation as a starting point to study the
response function, the position-velocity correlation function and the velocity
autocorrelation function of a charged Quantum Brownian particle in the presence
of a magnetic field and linearly coupled to a heat bath via position
coordinate. We study t... | 2105.07036v2 |
2021-05-18 | Partially dissipative hyperbolic systems in the critical regularity setting : The multi-dimensional case | We are concerned with quasilinear symmetrizable partially dissipative
hyperbolic systems in the whole space $\mathbb{R}^d$ with $d\geq2$. Following
our recent work [10] dedicated to the one-dimensional case, we establish the
existence of global strong solutions and decay estimates in the critical
regularity setting whe... | 2105.08333v1 |
2021-05-24 | Response Dynamics of Alkali Metal-Noble Gas Hybrid Trispin System | With numerical calculation of coupled Bloch equations, we have simulated the
spin dynamics of nuclear magnetic resonance gyroscope based on alkali
metal-noble gas hybrid trispin system. From the perspective of damping harmonic
oscillator, a thorough analysis of the response dynamics is demonstrated. The
simulation resu... | 2105.11124v2 |
2021-05-26 | Temperature Damping of Magneto-Intersubband Resistance Oscillations in Magnetically Entangled Subbands | Magneto-intersubband resistance oscillations (MISO) of highly mobile 2D
electrons in symmetric GaAs quantum wells with two populated subbands are
studied in magnetic fields tilted from the normal to the 2D electron layer at
different temperatures $T$. Decrease of MISO amplitude with temperature
increase is observed. At... | 2105.12263v1 |
2021-05-26 | A statistical study of propagating MHD kink waves in the quiescent corona | The Coronal Multi-channel Polarimeter (CoMP) has opened up exciting
opportunities to probe transverse MHD waves in the Sun's corona. The archive of
CoMP data is utilised to generate a catalogue of quiescent coronal loops that
can be used for studying propagating kink waves. The catalogue contains 120
loops observed bet... | 2105.12451v1 |
2021-05-31 | Machine-Learning Non-Conservative Dynamics for New-Physics Detection | Energy conservation is a basic physics principle, the breakdown of which
often implies new physics. This paper presents a method for data-driven "new
physics" discovery. Specifically, given a trajectory governed by unknown
forces, our Neural New-Physics Detector (NNPhD) aims to detect new physics by
decomposing the for... | 2106.00026v2 |
2021-06-06 | Non-delay limit in the energy space from the nonlinear damped wave equation to the nonlinear heat equation | We consider a singular limit problem from the damped wave equation with a
power type nonlinearity to the corresponding heat equation. We call our
singular limit problem non-delay limit. Our proofs are based on the argument
for non-relativistic limit from the nonlinear Klein-Gordon equation to the
nonlinear Schr\"{o}din... | 2106.03030v1 |
2021-06-10 | Symmetrical emergence of extreme events at multiple regions in a damped and driven velocity-dependent mechanical system | In this work, we report the emergence of extreme events in a damped and
driven velocity-dependent mechanical system. We observe that the extreme events
emerge at multiple points. We further notice that the extreme events occur
symmetrically in both positive and negative values at all the points of
emergence. We statist... | 2106.05510v2 |
2021-06-11 | On global existence for semilinear wave equations with spacedependent critical damping | The global existence for semilinear wave equations with space-dependent
critical damping $\partial_t^2u-\Delta u+\frac{V_0}{|x|}\partial_t u=f(u)$ in
an exterior domain is dealt with, where $f(u)=|u|^{p-1}u$ and $f(u)=|u|^p$ are
in mind. Existence and non-existence of global-in-time solutions are discussed.
To obtain g... | 2106.06107v1 |
2021-06-13 | Invariant measures for a stochastic nonlinear and damped 2D Schrödinger equation | We consider a stochastic nonlinear defocusing Schr\"{o}dinger equation with
zero-order linear damping, where the stochastic forcing term is given by a
combination of a linear multiplicative noise in the Stratonovich form and a
nonlinear noise in the It\^o form. We work at the same time on compact
Riemannian manifolds w... | 2106.07043v4 |
2021-06-13 | Blow-up and lifespan estimates for solutions to the weakly coupled system of nonlinear damped wave equations outside a ball | In this paper, we consider the initial-boundary value problems with several
fundamental boundary conditions (the Dirichlet/Neumann/Robin boundary
condition) for the multi-component system of semi-linear classical damped wave
equations outside a ball. By applying a test function approach with a judicious
choice of test ... | 2106.07050v2 |
2021-06-14 | An Overview of Energy-Optimal Impedance Control of Cooperative Robot Manipulators | An impedance-based control scheme is introduced for cooperative manipulators
grasping a rigid load. The position and orientation of the load are to be
maintained close to a desired trajectory, trading off tracking accuracy by low
energy consumption and maintaining stability. To this end, the augmented
dynamics of the r... | 2106.07491v1 |
2021-06-17 | Adaptive Low-Rank Regularization with Damping Sequences to Restrict Lazy Weights in Deep Networks | Overfitting is one of the critical problems in deep neural networks. Many
regularization schemes try to prevent overfitting blindly. However, they
decrease the convergence speed of training algorithms. Adaptive regularization
schemes can solve overfitting more intelligently. They usually do not affect
the entire networ... | 2106.09677v1 |
2021-06-23 | Effect of different additional $L^{m}$ regularity on semi-linear damped $σ$-evolution models | The motivation of the present study is to discuss the global (in time)
existence of small data solutions to the following semi-linear structurally
damped $\sigma$-evolution models: \begin{equation*}
\partial_{tt}u+(-\Delta)^{\sigma}u+(-\Delta)^{\sigma/2}\partial_{t}u=\left|u\right|
^{p}, \ \sigma\geq 1, \ \ p>1, \end{e... | 2106.12286v1 |
2021-06-29 | Damping effect in innovation processes: case studies from Twitter | Understanding the innovation process, that is the underlying mechanisms
through which novelties emerge, diffuse and trigger further novelties is
undoubtedly of fundamental importance in many areas (biology, linguistics,
social science and others). The models introduced so far satisfy the Heaps'
law, regarding the rate ... | 2106.15528v1 |
2021-07-01 | Local available quantum correlations of X states: The symmetric and anti-symmetric cases | Local available quantum correlations (LAQC), as defined by Mundarain et al.,
are analyzed for 2-qubit X states with local Bloch vectors of equal magnitude.
Symmetric X-states are invariant under the exchange of subsystems, hence having
the same {local} Bloch vector. On the other hand, anti-symmetric X states have
{loca... | 2107.00158v3 |
2021-07-06 | Dynamical System Parameter Identification using Deep Recurrent Cell Networks | In this paper, we investigate the parameter identification problem in
dynamical systems through a deep learning approach. Focusing mainly on
second-order, linear time-invariant dynamical systems, the topic of damping
factor identification is studied. By utilizing a six-layer deep neural network
with different recurrent... | 2107.02427v1 |
2021-07-14 | Explaining the pseudogap through damping and antidamping on the Fermi surface by imaginary spin scattering | The mechanism of the pseudogap observed in hole-doped cuprates remains one of
the central puzzles in condensed matter physics. We analyze this phenomenon via
a Feynman-diagrammatic inspection of the Hubbard model. Our approach captures
the pivotal interplay between Mott localization and Fermi surface topology
beyond we... | 2107.06529v2 |
2021-07-17 | Blow--up for the wave equation with hyperbolic dynamical boundary conditions, interior and boundary nonlinear damping and sources | The aim of this paper is to give global nonexistence and blow--up results for
the problem $$ \begin{cases} u_{tt}-\Delta u+P(x,u_t)=f(x,u) \qquad &\text{in
$(0,\infty)\times\Omega$,}\\ u=0 &\text{on $(0,\infty)\times \Gamma_0$,}\\
u_{tt}+\partial_\nu u-\Delta_\Gamma u+Q(x,u_t)=g(x,u)\qquad &\text{on
$(0,\infty)\times \... | 2107.08213v2 |
2021-07-22 | Collisional Growth Within the Solar System's Primordial Planetesimal Disk and the Timing of the Giant Planet Instability | The large scale structure of the Solar System has been shaped by a transient
dynamical instability that may have been triggered by the interaction of the
giants planets with a massive primordial disk of icy debris. In this work, we
investigate the conditions under which this primordial disk could have
coalesced into pl... | 2107.10403v1 |
2021-07-29 | $n$-dimensional PDM-damped harmonic oscillators: Linearizability, and exact solvability | We consider position-dependent mass (PDM) Lagrangians/Hamiltonians in their
standard textbook form, where the long-standing \emph{gain-loss balance}
between the kinetic and potential energies is kept intact to allow conservation
of total energy (i.e., $L=T-V$, $H=T+V$, and $dH/dt=dE/dt=0$). Under such
standard settings... | 2107.14617v1 |
2021-08-02 | Interplay of periodic dynamics and noise: insights from a simple adaptive system | We study the dynamics of a simple adaptive system in the presence of noise
and periodic damping. The system is composed by two paths connecting a source
and a sink, the dynamics is governed by equations that usually describe food
search of the paradigmatic Physarum polycephalum. In this work we assume that
the two path... | 2108.01451v3 |
2021-08-06 | Adjusting PageRank parameters and Comparing results | The effect of adjusting damping factor {\alpha} and tolerance {\tau} on
iterations needed for PageRank computation is studied here. Relative
performance of PageRank computation with L1, L2, and L{\infty} norms used as
convergence check, are also compared with six possible mean ratios. It is
observed that increasing the... | 2108.02997v1 |
2021-08-06 | Magnon transport in $\mathrm{\mathbf{Y_3Fe_5O_{12}}}$/Pt nanostructures with reduced effective magnetization | For applications making use of magnonic spin currents damping effects, which
decrease the spin conductivity, have to be minimized. We here investigate the
magnon transport in an yttrium iron garnet thin film with strongly reduced
effective magnetization. We show that in a three-terminal device the effective
magnon cond... | 2108.03263v1 |
2021-08-12 | On the critical exponent and sharp lifespan estimates for semilinear damped wave equations with data from Sobolev spaces of negative order | We study semilinear damped wave equations with power nonlinearity $|u|^p$ and
initial data belonging to Sobolev spaces of negative order $\dot{H}^{-\gamma}$.
In the present paper, we obtain a new critical exponent
$p=p_{\mathrm{crit}}(n,\gamma):=1+\frac{4}{n+2\gamma}$ for some
$\gamma\in(0,\frac{n}{2})$ and low dimensi... | 2108.05667v1 |
2021-08-25 | Numerical investigation of non-condensable gas effect on vapor bubble collapse | We numerically investigate the effect of non-condensable gas inside a vapor
bubble on bubble dynamics, collapse pressure and pressure impact of spherical
and aspherical bubble collapses. Free gas inside a vapor bubble has a damping
effect that can weaken the pressure wave and enhance the bubble rebound. To
estimate thi... | 2108.11297v1 |
2021-08-23 | PDM damped-driven oscillators: exact solvability, classical states crossings, and self-crossings | Within the standard Lagrangian and Hamiltonian setting, we consider a
position-dependent mass (PDM) classical particle performing a damped driven
oscillatory (DDO) motion under the influence of a conservative harmonic
oscillator force field $V\left( x\right) =\frac{1}{2}\omega ^{2}Q\left(
x\right) x^{2}$ and subjected ... | 2108.13924v1 |
2021-09-06 | A well-balanced oscillation-free discontinuous Galerkin method for shallow water equations | In this paper, we develop a well-balanced oscillation-free discontinuous
Galerkin (OFDG) method for solving the shallow water equations with a non-flat
bottom topography. One notable feature of the constructed scheme is the
well-balanced property, which preserves exactly the hydrostatic equilibrium
solutions up to mach... | 2109.02193v1 |
2021-09-16 | Landau Modes are Eigenmodes of Stellar Systems in the Limit of Zero Collisions | We consider the spectrum of eigenmodes in a stellar system dominated by
gravitational forces in the limit of zero collisions. We show analytically and
numerically using the Lenard-Bernstein collision operator that the Landau
modes, which are not true eigenmodes in a strictly collisionless system (except
for the Jeans u... | 2109.07806v2 |
2021-09-16 | Stabilization of physical systems via saturated controllers with only partial state measurements | This paper provides a constructive passivity-based control approach to solve
the set-point regulation problem for input-affine continuous nonlinear systems
while considering saturation in the inputs. As customarily in passivity-based
control, the methodology consists of two steps: energy shaping and damping
injection. ... | 2109.08111v2 |
2021-09-15 | Universal relations between the quasinormal modes of neutron star and tidal deformability | Universal relations independently of the equation of state (EOS) for neutron
star matter are valuable, if they exist, for extracting the neutron star
properties, which generally depend on the EOS. In this study, we newly derive
the universal relations predicting the gravitational wave frequencies for the
fundamental ($... | 2109.08145v2 |
2021-09-27 | Estimating the characteristics of stochastic damping Hamiltonian systems from continuous observations | We consider nonparametric invariant density and drift estimation for a class
of multidimensional degenerate resp. hypoelliptic diffusion processes,
so-called stochastic damping Hamiltonian systems or kinetic diffusions, under
anisotropic smoothness assumptions on the unknown functions. The analysis is
based on continuo... | 2109.13190v3 |
2021-10-04 | Anomalous temperature dependence of phonon pumping by ferromagnetic resonance in Co/Pd multilayers with perpendicular anisotropy | We demonstrate the pumping of phonons by ferromagnetic resonance in a series
of [Co(0.8 nm)/Pd(1.5 nm)]$_n$ multilayers ($n =$ 6, 11, 15, and 20) with large
magnetostriction and perpendicular magnetic anisotropy. The effect is shown
using broadband ferromagnetic resonance over a range of temperatures (10 to 300
K), whe... | 2110.01714v1 |
2021-10-05 | A BSDEs approach to pathwise uniqueness for stochastic evolution equations | We prove strong well-posedness for a class of stochastic evolution equations
in Hilbert spaces H when the drift term is Holder continuous. This class
includes examples of semilinear stochastic damped wave equations which describe
elastic systems with structural damping (for such equations even existence of
solutions in... | 2110.01994v2 |
2021-10-07 | Quantum speed limit for the maximum coherent state under squeezed environment | The quantum speed limit time for quantum system under squeezed environment is
studied. We consider two typical models, the damped Jaynes-Cummings model and
the dephasing model. For the damped Jaynes-Cummings model under squeezed
environment, we find that the quantum speed limit time becomes larger with the
squeezed par... | 2110.03132v1 |
2021-10-13 | Effect of damped oscillations in the inflationary potential | We investigate the effect of damped oscillations on a nearly flat
inflationary potential and the features they produce in the power-spectrum and
bi-spectrum. We compare the model with the Planck data using Plik unbinned and
CamSpec clean likelihood and we are able to obtain noticeable improvement in
fit compared to the... | 2110.06837v2 |
2021-10-14 | Thermalization in a Spin-Orbit coupled Bose gas by enhanced spin Coulomb drag | An important component of the structure of the atom, the effects of
spin-orbit coupling are present in many sub-fields of physics. Most of these
effects are present continuously. We present a detailed study of the dynamics
of changing the spin-orbit coupling in an ultra-cold Bose gas, coupling the
motion of the atoms t... | 2110.07094v3 |
2021-10-15 | Superconducting dome in ferroelectric-type materials from soft mode instability | We present a minimal theory of superconductivity enhancement in
ferroelectric-type materials. Simple expressions for the optical mode
responsible for the soft mode transition are assumed. A key role is played by
the anharmonic phonon damping which is modulated by an external control
parameter (electron doping or mechan... | 2110.08114v2 |
2021-10-20 | Dimensional control of tunneling two level systems in nanoelectromechanical resonators | Tunneling two level systems affect damping, noise and decoherence in a wide
range of devices, including nanoelectromechanical resonators, optomechanical
systems, and qubits. Theoretically this interaction is usually described within
the tunneling state model. The dimensions of such devices are often small
compared to t... | 2110.10492v1 |
2021-10-27 | Quantum oscillations in interaction-driven insulators | In recent years it has become understood that quantum oscillations of the
magnetization as a function of magnetic field, long recognized as phenomena
intrinsic to metals, can also manifest in insulating systems. Theory has shown
that in certain simple band insulators, quantum oscillations can appear with a
frequency se... | 2110.14643v2 |
2021-11-01 | Achieving increased Phasor POD performance by introducing a Control-Input Model | In this paper, an enhancement to the well known Phasor Power Oscillation
Damper is proposed, aiming to increase its performance. Fundamental to the
functioning of this controller is the estimation of a phasor representing
oscillatory behaviour at a particular frequency in a measured signal. The
phasor is transformed to... | 2111.00968v2 |
2021-11-02 | Escape kinetics of self-propelled particles from a circular cavity | We numerically investigate the mean exit time of an inertial active Brownian
particle from a circular cavity with single or multiple exit windows. Our
simulation results witness distinct escape mechanisms depending upon the
relative amplitudes of the thermal length and self-propulsion length compared
to the cavity and ... | 2111.01324v1 |
2021-11-09 | Quantum Control of the Time-Dependent Interaction between a Three-Level $Ξ$-Type Atom and a Two-Mode Field with Damping Term | The purpose of this paper is to investigate some properties through a
three-level $\Xi$-type atom interacting with a two-mode field. We test this
system in the presence of the photon assisted atomic phase damping, detuning
parameter and Kerr nonlinearity. Also, the coupling parameter modulated to be
time-dependent. The... | 2111.05449v1 |
2021-11-10 | On the Convergence of Orthogonal/Vector AMP: Long-Memory Message-Passing Strategy | Orthogonal/vector approximate message-passing (AMP) is a powerful
message-passing (MP) algorithm for signal reconstruction in compressed sensing.
This paper proves the convergence of Bayes-optimal orthogonal/vector AMP in the
large system limit. The proof strategy is based on a novel long-memory (LM) MP
approach: A fir... | 2111.05522v2 |
2021-11-15 | Spectral analysis of a viscoelastic tube conveying fluid with generalised boundary conditions | We study the spectral problem associated with the equation governing the
small transverse motions of a viscoelastic tube of finite length conveying an
ideal fluid. The boundary conditions considered are of general form, accounting
for a combination of elasticity and viscous damping acting on both the slopes
and the dis... | 2111.07697v5 |
2021-11-18 | Confronting cosmic ray electron and positron excesses with hybrid triplet Higgs portal dark matter | We perform a detailed study of scalar dark matter with triplet Higgs
extensions of the Standard Model in order to explain the cosmic ray electron
and positron excesses reported by AMS-02 and DAMPE. A detailed analysis of
AMS-02 positron excess reveals that for different orderings (normal, inverted
and quasi-degenerate)... | 2111.09559v3 |
2021-11-30 | Damping via the hyperfine interaction of a spin-rotation mode in a two-dimensional strongly magnetized electron plasma | We address damping of a Goldstone spin-rotation mode emerging in a quantum
Hall ferromagnet due to laser pulse excitation. Recent experimental data show
that the attenuation mechanism, dephasing of the observed Kerr precession, is
apparently related not only to spatial fluctuations of the electron Land\'e
factor in the... | 2111.15433v1 |
2021-11-30 | Heating of Magnetically Dominated Plasma by Alfvén-Wave Turbulence | Magnetic energy around astrophysical compact objects can strongly dominate
over plasma rest mass. Emission observed from these systems may be fed by
dissipation of Alfv\'en wave turbulence, which cascades to small damping
scales, energizing the plasma. We use 3D kinetic simulations to investigate
this process. When the... | 2111.15578v2 |
2021-12-06 | Decay properties and asymptotic behaviors for a wave equation with general strong damping | In this paper, we study the Cauchy problem for a wave equation with general
strong damping $-\mu(|D|)\Delta u_t$ motivated by [Tao, Anal. PDE (2009)] and
[Ebert-Girardi-Reissig, Math. Ann. (2020)]. By employing energy methods in the
Fourier space and WKB analysis, we derive decay estimates for solutions under a
large c... | 2112.02795v1 |
2021-12-09 | UV sensitivity of Casimir energy | We quantitatively estimate the effect of the UV physics on the Casimir energy
in a five-dimensional (5D) model on $S^1/Z_2$. If the cutoff scale of the 5D
theory is not far from the compactification scale, the UV physics may affect
the low energy result. We work in the cutoff regularization scheme by
introducing two in... | 2112.04708v3 |
2021-12-11 | Landau damping in hybrid plasmonics | Landau Damping (LD) mechanism of the Localized Surface Plasmon (LSP) decay is
studied for the hybrid nanoplasmonic (metal core/dielectric shell) structures.
It is shown that LD in hybrid structures is strongly affected by permittivity
and electron effective mass in the dielectric shell in accordance with previous
obser... | 2112.06005v1 |
2021-12-12 | Raman and infrared studies of CdSe/CdS core/shell nanoplatelets | The vibrational spectroscopy of semiconductor nanostructures can provide
important information on their structure. In this work, experimental Raman and
infrared spectra are compared with vibrational spectra of CdSe/CdS core/shell
nanoplatelets calculated from first principles using the density functional
theory. The ca... | 2112.06326v1 |
2021-12-20 | Long-time behavior of solutions to the M1 model with boundray effect | In this paper, we are concerned with the asymptotic behavior of solutions of
M1 model on quadrant. From this model, combined with damped compressible Euler
equations, a more general system is introduced. We show that the solutions to
the initial boundary value problem of this system globally exist and tend
time-asympto... | 2112.10392v1 |
2021-12-22 | Quantum fisher information protection of N-qubit Greenberger-Horne-Zeilinger state from decoherence | In this paper we study the protection of N-qubit Greenberger-Horne- Zeilinger
(GHZ) state and generalized N-qubit GHZ states in amplitude damping channel by
means of quantum weak measurement and flip operations. We derive the explicit
formulas of the performances of the protection scheme: average fidelity,
average prob... | 2112.11590v1 |
2021-12-23 | Theory of Harmonic Hall Responses of Spin-Torque Driven Antiferromagnets | Harmonic analysis is a powerful tool to characterize and quantify
current-induced torques acting on magnetic materials, but so far it remains an
open question in studying antiferromagnets. Here we formulate a general theory
of harmonic Hall responses of collinear antiferromagnets driven by
current-induced torques inclu... | 2112.12772v2 |
2021-12-24 | Total Energy Shaping with Neural Interconnection and Damping Assignment -- Passivity Based Control | In this work we exploit the universal approximation property of Neural
Networks (NNs) to design interconnection and damping assignment (IDA)
passivity-based control (PBC) schemes for fully-actuated mechanical systems in
the port-Hamiltonian (pH) framework. To that end, we transform the IDA-PBC
method into a supervised ... | 2112.12999v2 |
2021-12-24 | Critical comparison of collisionless fluid models: Nonlinear simulations of parallel firehose instability | Two different fluid models for collisionless plasmas are compared. One is
based on the classical Chew-Goldberger-Low (CGL) model that includes a finite
Larmor radius (FLR) correction and the Landau closure for the longitudinal
mode. Another one takes into account the effect of cyclotron resonance in
addition to Landau ... | 2112.13077v1 |
2022-01-04 | Second order splitting dynamics with vanishing damping for additively structured monotone inclusions | In the framework of a real Hilbert space, we address the problem of finding
the zeros of the sum of a maximally monotone operator $A$ and a cocoercive
operator $B$. We study the asymptotic behaviour of the trajectories generated
by a second order equation with vanishing damping, attached to this problem,
and governed b... | 2201.01017v1 |
2022-01-15 | Some Lq(R)-norm decay estimates for two Cauchy systems of type Rao-Nakra sandwich beam with a frictional damping or an infinite memory | In this paper, we consider two systems of type Rao-Nakra sandwich beam in the
whole line R with a frictional damping or an infinite memory acting on the
Euler-Bernoulli equation. When the speeds of propagation of the two wave
equations are equal, we show that the solutions do not converge to zero when
time goes to infi... | 2201.05881v1 |
2022-01-24 | Pseudospectral continuation for aeroelastic stability analysis | This technical note is concerned with aeroelastic flutter problems: the
analysis of aeroelastic systems undergoing airspeed-dependent dynamic
instability. Existing continuation methods for parametric stability analysis
are based on marching along an airspeed parameter until the flutter point is
found - an approach whic... | 2201.09816v1 |
2022-01-26 | Enhanced weak force sensing through atom-based coherent noise cancellation in a hybrid cavity optomechanical system | We investigate weak force-sensing based on coherent quantum noise
cancellation in a nonlinear hybrid optomechanical system. The optomechanical
cavity contains a moveable mechanical mirror, a fixed semitransparent mirror,
an ensemble of ultracold atoms, and an optical parametric amplifier (OPA).
Using the coherent quant... | 2201.10805v1 |
2022-01-31 | Indistinguishability-enhanced entanglement recovery by spatially localized operations and classical communication | We extend a procedure exploiting spatial indistinguishability of identical
particles to recover the spoiled entanglement between two qubits interacting
with Markovian noisy environments. Here, the spatially localized operations and
classical communication (sLOCC) operational framework is used to activate the
entangleme... | 2201.13365v1 |
2022-02-01 | Uniform synchronization of an abstract linear second order evolution system | Although the mathematical study on the synchronization of wave equations at
finite horizon has been well developed, there was few results on the
synchronization of wave equations for long-time horizon. The aim of the paper
is to investigate the uniform synchronization at the infinite horizon for one
abstract linear sec... | 2202.00771v1 |
2022-02-02 | Electric field screening in pair discharges and generation of pulsar radio emission | Pulsar radio emission may be generated in pair discharges which fill the
pulsar magnetosphere with plasma as an accelerating electric field is screened
by freshly created pairs. In this Letter we develop a simplified analytic
theory for the screening of the electric field in these pair discharges and use
it to estimate... | 2202.01303v2 |
2022-01-22 | Dynamics of a Charged Thomas Oscillator in an External Magnetic Field | In this letter, we provide a detailed numerical examination of the dynamics
of a charged Thomas oscillator in an external magnetic field. We do so by
adopting and then modifying the cyclically symmetric Thomas oscillator to study
the dynamics of a charged particle in an external magnetic field. These
dynamical behaviou... | 2202.02383v2 |
2022-02-15 | Damped Online Newton Step for Portfolio Selection | We revisit the classic online portfolio selection problem, where at each
round a learner selects a distribution over a set of portfolios to allocate its
wealth. It is known that for this problem a logarithmic regret with respect to
Cover's loss is achievable using the Universal Portfolio Selection algorithm,
for exampl... | 2202.07574v1 |
2022-02-22 | Modal Estimation on a Warped Frequency Axis for Linear System Modeling | Linear systems such as room acoustics and string oscillations may be modeled
as the sum of mode responses, each characterized by a frequency, damping and
amplitude. Here, we consider finding the mode parameters from impulse response
measurements, and estimate the mode frequencies and decay rates as the
generalized eige... | 2202.11192v1 |
2022-02-28 | Estimating the degree of non-Markovianity using variational quantum circuits | Several applications of quantum machine learning (QML) rely on a quantum
measurement followed by training algorithms using the measurement outcomes.
However, recently developed QML models, such as variational quantum circuits
(VQCs), can be implemented directly on the state of the quantum system (quantum
data). Here, w... | 2202.13964v3 |
2022-03-08 | Interplay between nonlinear spectral shift and nonlinear damping of spin waves in ultrathin YIG waveguides | We use the phase-resolved imaging to directly study the nonlinear
modification of the wavelength of spin waves propagating in 100-nm thick,
in-plane magnetized YIG waveguides. We show that, by using moderate microwave
powers, one can realize spin waves with large amplitudes corresponding to
precession angles in excess ... | 2203.04018v1 |
2022-03-08 | The low energy excitation spectrum of magic-angle semimetals | We theoretically study the excitation spectrum of a two-dimensional Dirac
semimetal in the presence of an incommensurate potential. Such models have been
shown to possess magic-angle critical points in the single particle
wavefunctions, signalled by a momentum space delocalization of plane wave
eigenstates and flat ban... | 2203.04318v1 |
2022-03-09 | Nonequilibrium Hole Dynamics in Antiferromagnets: Damped Strings and Polarons | We develop a nonperturbative theory for hole dynamics in antiferromagnetic
spin lattices, as described by the $t$-$J$ model. This is achieved by
generalizing the selfconsistent Born approximation to nonequilibrium systems,
making it possible to calculate the full time-dependent many-body wave
function. Our approach rev... | 2203.04789v2 |
2022-03-10 | Dynamics of the collapse of a ferromagnetic skyrmion in a centrosymmetric lattice | Time dependence of the size and chirality of a ferromagnetic skyrmion in a
Heisenberg model with the magnetic field on a square lattice has been studied
analytically and numerically. The lattice and the magnetic field generate
strong time dependence of the skyrmion chirality. Due to nonlinearity, the
lattice alone also... | 2203.05342v1 |
2022-03-22 | Viscous and centrifugal instabilities of massive stars | Massive stars exhibit a variety of instabilities, many of which are poorly
understood. We explore instabilities induced by centrifugal forces and angular
momentum transport in massive rotating stars. First, we derive and numerically
solve linearized oscillation equations for adiabatic radial modes in polytropic
stellar... | 2203.11809v1 |
2022-03-27 | Improvement on the blow-up for a weakly coupled wave equations with scale-invariant damping and mass and time derivative nonlinearity | An improvement of [18] on the blow-up region and the lifespan estimate of a
weakly coupled system of wave equations with damping and mass in the
scale-invariant case and with time-derivative nonlinearity is obtained in this
article. Indeed, thanks to a better understanding of the dynamics of the
solutions, we give here... | 2203.14403v1 |
2022-03-24 | Walking droplets as a damped-driven system | We consider the dynamics of a droplet on a vibrating fluid bath. This
hydrodynamic quantum analog system is shown to elicit the canonical behavior of
damped-driven systems, including a period doubling route to chaos. By
approximating the system as a compositional map between the gain and loss
dynamics, the underlying n... | 2203.14705v2 |
2022-04-07 | Pseudo Numerical Ranges and Spectral Enclosures | We introduce the new concepts of pseu\-do numerical range for operator
functions and families of sesquilinear forms as well as the pseu\-do block
numerical range for $n \times n$ operator matrix functions. While these notions
are new even in the bounded case, we cover operator polynomials with unbounded
coefficients, u... | 2204.03584v1 |
2022-04-13 | Primordial Gravitational Waves Predictions for GW170817-compatible Einstein-Gauss-Bonnet Theory | In this work we shall calculate in detail the effect of an
GW170817-compatible Einstein-Gauss-Bonnet theory on the energy spectrum of the
primordial gravitational waves. The spectrum is affected by two
characteristics, the overall amplification/damping factor caused by the
GW170817-compatible Einstein-Gauss-Bonnet theo... | 2204.06304v1 |
2022-04-14 | Stability of Exponentially Damped Oscillations under Perturbations of the Mori-Chain | There is an abundance of evidence that some relaxation dynamics, e.g.,
exponential decays, are much more common in nature than others. Recently, there
have been attempts to trace this dominance back to a certain stability of the
prevalent dynamics versus generic Hamiltonian perturbations. In the paper at
hand, we tackl... | 2204.06903v1 |
2022-04-24 | Integrated Local Energy Decay for the Damped Wave Equation on Stationary Space-Times | We prove integrated local energy decay for the damped wave equation on
stationary, asymptotically flat space-times in (1 + 3) dimensions. Local energy
decay constitutes a powerful tool in the study of dispersive partial
differential equations on such geometric backgrounds. By utilizing the
geometric control condition t... | 2204.11339v2 |
2022-04-26 | Accelerated-gradient-based generalized Levenberg--Marquardt method with oracle complexity bound and local quadratic convergence | Minimizing the sum of a convex function and a composite function appears in
various fields. The generalized Levenberg--Marquardt (LM) method, also known as
the prox-linear method, has been developed for such optimization problems. The
method iteratively solves strongly convex subproblems with a damping term. This
study... | 2204.12016v3 |
2022-05-02 | Thermoacoustic shocks in complex plasmas | The formation of thermoacoustic shocks is revealed in a fluid complex plasma.
The thermoacoustic wave mode can be damped (or anti-damped) when the
contribution from the thermoacoustic interaction is lower (or higher) than that
due to the particle collision and/or the kinematic viscosity. In the nonlinear
regime, the th... | 2205.00896v1 |
2022-05-09 | Mutual friction and diffusion of two-dimensional quantum vortices | We present a microscopic open quantum systems theory of thermally-damped
vortex motion in oblate atomic superfluids that includes previously neglected
energy-damping interactions between superfluid and thermal atoms. This
mechanism couples strongly to vortex core motion and causes dissipation of
vortex energy due to mu... | 2205.04065v2 |
2022-05-09 | Nonlinear Landau damping for the Vlasov-Poisson system in $\R^3$: the Poisson equilibrium | We prove asymptotic stability of the Poisson homogeneous equilibrium among
solutions of the Vlassov-Poisson system in the Euclidean space $\mathbb{R}^3$.
More precisely, we show that small, smooth, and localized perturbations of the
Poisson equilibrium lead to global solutions of the Vlasov-Poisson system,
which scatte... | 2205.04540v2 |
2022-05-11 | Domain wall damped harmonic oscillations induced by curvature gradients in elliptical magnetic nanowires | Understanding the domain wall (DW) dynamics in magnetic nanowires (NW) is
crucial for spintronic-based applications demanding the use of DWs as
information carriers. This work focuses on the dynamics of a DW displacing
along a bent NW with an elliptical shape under the action of spin-polarized
electric currents and ext... | 2205.05716v1 |
2022-05-12 | Global existence and stability of subsonic time-periodic solution to the damped compressible Euler equations in a bounded domain | In this paper, we consider the one-dimensional isentropic compressible Euler
equations with source term $\beta(t,x)\rho|u|^{\alpha}u$ in a bounded domain,
which can be used to describe gas transmission in a nozzle.~The model is
imposed a subsonic time-periodic boundary condition.~Our main results reveal
that the time-p... | 2205.05858v2 |
2022-05-23 | Global existence, uniqueness and $L^{\infty}$-bound of weak solutions of fractional time-space Keller-Segel system | This paper studies the properties of weak solutions to a class of space-time
fractional parabolic-elliptic Keller-Segel equations with logistic source terms
in $\mathbb{R}^{n}$, $n\geq 2$. The global existence and $L^{\infty}$-bound of
weak solutions are established. We mainly divide the damping coefficient into
two ca... | 2205.11041v1 |
2022-05-23 | Schur complement dominant operator matrices | We propose a method for the spectral analysis of unbounded operator matrices
in a general setting which fully abstains from standard perturbative arguments.
Rather than requiring the matrix to act in a Hilbert space $\mathcal{H}$, we
extend its action to a suitable distributional triple $\mathcal{D} \subset
\mathcal{H}... | 2205.11653v1 |
2022-05-24 | Extensions and Analysis of an Iterative Solution of the Helmholtz Equation via the Wave Equation | In this paper we extend analysis of the WaveHoltz iteration -- a time-domain
iterative method for the solution of the Helmholtz equation. We expand the
previous analysis of energy conserving problems and prove convergence of the
WaveHoltz iteration for problems with impedance boundary conditions in a single
spatial dim... | 2205.12349v1 |
2022-05-31 | Phonon decay in 1D atomic Bose quasicondensates via Beliaev-Landau damping | In a 1D Bose gas, there is no non-trivial scattering channel involving three
Bogoliubov quasiparticles that conserves both energy and momentum.
Nevertheless, we show that such 3-wave mixing processes (Beliaev and Landau
damping) account for their decay via interactions with thermal fluctuations.
Within an appropriate t... | 2205.15826v2 |
2022-06-02 | Bistability in dissipatively coupled cavity magnonics | Dissipative coupling of resonators arising from their cooperative dampings to
a common reservoir induces intriguingly new physics such as energy level
attraction. In this study, we report the nonlinear properties in a
dissipatively coupled cavity magnonic system. A magnetic material YIG (yttrium
iron garnet) is placed ... | 2206.01231v1 |
2022-06-02 | Impact of Frequency Support by Wind Turbines on Small-Signal Stability of Power Systems | Rising wind energy integration, accompanied by a decreasing level of system
inertia, requires additional sources of ancillary services. Wind turbines based
on doubly fed induction generators (DFIG) can provide inertial and primary
frequency support, when equipped with specific controls. This paper
investigates the effe... | 2206.01237v1 |
2022-06-03 | An Assessment Of Full-Wave Effects On Maxwellian Lower-Hybrid Wave Damping | Lower-hybrid current drive (LHCD) actuators are important components of
modern day fusion experiments as well as proposed fusion reactors. However,
simulations of LHCD often differ substantially from experimental results, and
from each other, especially in the inferred power deposition profile shape.
Here we investigat... | 2206.01773v2 |
2022-06-06 | Fermi spin polaron and dissipative Fermi-polaron Rabi dynamics | We consider a spin impurity with multiple energy levels moving in a
non-interacting Fermi sea, and theoretically solve this Fermi spin polaron
problem at nonzero temperature by using a non-self-consistent many-body
$T$-matrix theory. We focus on the simplest case with spin half, where the two
energy states of the impur... | 2206.02317v4 |
2022-06-09 | A deep learning method for the trajectory reconstruction of cosmic rays with the DAMPE mission | A deep learning method for the particle trajectory reconstruction with the
DAMPE experiment is presented. The developed algorithms constitute the first
fully machine-learned track reconstruction pipeline for space astroparticle
missions. Significant performance improvements over the standard
hand-engineered algorithms ... | 2206.04532v2 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.