publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2020-10-15 | Dephasing in strongly disordered interacting quantum wires | Many-body localization is a fascinating theoretical concept describing the
intricate interplay of quantum interference, i.e. localization, with many-body
interaction induced dephasing. Numerous computational tests and also several
experiments have been put forward to support the basic concept. Typically,
averages of ti... | 2010.07919v1 |
2020-10-19 | Modified EP MIMO Detection Algorithm with Deep Learning Parameters Selection | Expectation Propagation (EP)-based Multiple-Input Multiple-Output (MIMO)
detector is regarded as a state-of-the-art MIMO detector because of its
exceptional performance. However, we find that the EP MIMO detector cannot
guarantee to achieve the optimal performance due to the empirical parameter
selection, including ini... | 2010.09183v2 |
2020-10-23 | A damped point-vortex model for polar-core spin vortices in a ferromagnetic spin-1 Bose-Einstein condensate | Ferromagnetic spin-1 Bose-Einstein condensates in the broken-axisymmetric
phase support polar-core spin vortices (PCVs), which are intimately linked to
the nonequilibrium dynamics of the system. For a purely transversely magnetized
system, the Turner point-vortex model predicts that PCVs behave like massive
charged par... | 2010.12154v1 |
2020-10-26 | Viscous damping of chiral dynamos in the early universe | Chiral dynamo converting asymmetry between right and left-handed leptons in
the early universe into helical magnetic field has been proposed as a possible
cosmological magnetogenesis scenario. We show that this mechanism is strongly
affected by viscous damping of primordial plasma motions excited by the dynamo.
This ef... | 2010.13571v1 |
2020-10-28 | Construction of quasimodes for non-selfadjoint operators via propagation of Hagedorn wave-packets | We construct quasimodes for some non-selfadjoint semiclassical operators at
the boundary of the pseudo-spectrum using propagation of Hagedorn wave-packets.
Assuming that the imaginary part of the principal symbol of the operator is
non-negative and vanishes on certain points of the phase-space satisfying a
subelliptic ... | 2010.14967v5 |
2020-10-29 | Collisionless sound of bosonic superfluids in lower dimensions | The superfluidity of low-temperature bosons is well established in the
collisional regime. In the collisionless regime, however, the presence of
superfluidity is not yet fully clarified, in particular in lower spatial
dimensions. Here we compare the Vlasov-Landau equation, which does not take
into account the superflui... | 2010.15724v3 |
2020-11-02 | Constraining the Halo Mass of Damped Ly$α$ Absorption Systems (DLAs) at $z=2-3.5$ using the Quasar-CMB Lensing Cross-correlation | We study the cross correlation of damped Ly$\alpha$ systems (DLAs) and their
background quasars, using the most updated DLA catalog and the Planck 2018 CMB
lensing convergence field. Our measurement suggests that the DLA bias $b_{\rm
DLA}$ is smaller than $3.1$, corresponding to $\log(M/M_\odot h^{-1})\leq 12.3$
at a c... | 2011.01234v1 |
2020-11-07 | Bresse-Timoshenko type systems with thermodiffusion effects: Well-possedness, stability and numerical results | Bresse-Timoshenko beam model with thermal, mass diffusion and theormoelastic
effects is studied. We state and prove the well-posedness of problem. The
global existence and uniqueness of the solution is proved by using the
classical Faedo-Galerkin approximations along with two a priori estimates. We
prove an exponential... | 2011.03680v2 |
2020-11-09 | Impedance Optimization for Uncertain Contact Interactions Through Risk Sensitive Optimal Control | This paper addresses the problem of computing optimal impedance schedules for
legged locomotion tasks involving complex contact interactions. We formulate
the problem of impedance regulation as a trade-off between disturbance
rejection and measurement uncertainty. We extend a stochastic optimal control
algorithm known ... | 2011.04684v2 |
2020-11-12 | A priori bounds for rough differential equations with a non-linear damping term | We consider a rough differential equation with a non-linear damping drift
term: \begin{align*} dY(t) = - |Y|^{m-1} Y(t) dt + \sigma(Y(t)) dX(t),
\end{align*} where $X$ is a branched rough path of arbitrary regularity $\alpha
>0$, $m>1$ and where $\sigma$ is smooth and satisfies an $m$ and
$\alpha$-dependent growth prop... | 2011.06645v4 |
2020-12-07 | Damped Neutrino Oscillations in a Conformal Coupling Model | Flavor transitions of Neutrinos with a nonstandard interaction are studied. A
scalar field is conformally coupled to matter and neutrinos. This interaction
alters the neutrino effective mass and its wavefunction leading to a damping
factor, causing deficits in the probability densities and affecting the
oscillation pha... | 2012.03633v3 |
2020-12-10 | Wakefield decay in a radially bounded plasma due to formation of electron halo | There is a new effect that can limit the lifetime of a weakly nonlinear
wakefield in a radially bounded plasma. If the drive beam is narrow, some of
the plasma electrons fall out of the collective motion and leave the plasma
radially, forming a negatively charged halo around it. These electrons
repeatedly return to the... | 2012.05676v1 |
2020-12-17 | Magnetic equivalent of electric superradiance: radiative damping in yttrium-iron-garnet films | A dense system of independent oscillators, connected only by their
interaction with the same cavity excitation mode, will radiate coherently,
which effect is termed superradiance. In several cases, especially if the
density of oscillators is high, the superradiance may dominate the intrinsic
relaxation processes. This ... | 2012.09440v1 |
2020-12-21 | Dissipation-driven strange metal behavior | Anomalous metallic properties are often observed in the proximity of quantum
critical points (QCPs), with violation of the Fermi Liquid paradigm. We propose
a scenario where, due to the presence of a nearby QCP, dynamical fluctuations
of the order parameter with finite correlation length mediate a nearly
isotropic scat... | 2012.11697v1 |
2020-12-22 | Damped perturbations of systems with centre-saddle bifurcation | An autonomous system of ordinary differential equations in the plane with a
centre-saddle bifurcation is considered. The influence of time damped
perturbations with power-law asymptotics is investigated. The particular
solutions tending at infinity to the fixed points of the limiting system are
considered. The stabilit... | 2012.12116v1 |
2020-12-22 | Mechanical parametric feedback-cooling for pendulum-based gravity experiments | Gravitational forces that oscillate at audio-band frequencies are measured
with masses suspended as pendulums that have resonance frequencies even lower.
If the pendulum is excited by thermal energy or by seismic motion of the
environment, the measurement sensitivity is reduced. Conventionally, this
problem is mitigate... | 2012.12158v2 |
2020-12-23 | The fate of nonlinear perturbations near the QCD critical point | The impact of the QCD critical point on the propagation of nonlinear waves
has been studied. The effects have been investigated within the scope of
second-order causal dissipative hydrodynamics by incorporating the critical
point into the equation of state, and the scaling behaviour of transport
coefficients and of the... | 2012.12668v3 |
2020-12-28 | A weakly nonlinear wave equation for damped acoustic waves with thermodynamic non-equilibrium effects | The problem of propagating nonlinear acoustic waves is considered; the
solution to which, both with and without damping, having been obtained to-date
starting from the Navier-Stokes-Duhem equations together with the continuity
and thermal conduction equation. The novel approach reported here adopts
instead, a discontin... | 2012.14399v2 |
2020-12-28 | Reliability optimization of friction-damped systems using nonlinear modes | A novel probabilistic approach for the design of mechanical structures with
friction interfaces is proposed. The objective function is defined as the
probability that a specified performance measure of the forced vibration
response is achieved subject to parameter uncertainties. The practicability of
the approach regar... | 2012.14466v1 |
2021-01-04 | Fast flavor oscillations in dense neutrino media with collisions | We investigate the impact of the nonzero neutrino splitting and elastic
neutrino-nucleon collisions on fast neutrino oscillations. Our calculations
confirm that a small neutrino mass splitting and the neutrino mass hierarchy
have very little effect on fast oscillation waves. We also demonstrate
explicitly that fast osc... | 2101.01278v2 |
2021-01-25 | A modified Kačanov iteration scheme with application to quasilinear diffusion models | The classical Ka\v{c}anov scheme for the solution of nonlinear variational
problems can be interpreted as a fixed point iteration method that updates a
given approximation by solving a linear problem in each step. Based on this
observation, we introduce a modified Ka\v{c}anov method, which allows for
(adaptive) damping... | 2101.10137v3 |
2021-01-29 | One-parameter robust global frequency estimator for slowly varying amplitude and noisy oscillations | Robust online estimation of oscillation frequency belongs to classical
problems of system identification and adaptive control. The given harmonic
signal can be noisy and with varying amplitude at the same time, as in the case
of damped vibrations. A novel robust frequency-estimation algorithm is proposed
here, motivate... | 2101.12497v3 |
2021-01-29 | Quarter and Full Car Models Optimisation of Passive and Active Suspension System Using Genetic Algorithm | This study evaluates a suspension design of a passenger car to obtain maximum
rider's comfort when the vehicle is subjected to different road profile or road
surface condition. The challenge will be on finding a balance between the
rider's comfort and vehicle handling to optimize design parameters. The study
uses a sim... | 2101.12629v1 |
2021-03-01 | Dynamics of a ring of three unidirectionally coupled Duffing oscillators with time-dependent damping | We study dynamics of a ring of three unidirectionally coupled double-well
Duffing oscillators for three different values of the damping coefficient:
fixed dumping, proportional to time, and inversely proportional to time. The
dynamics in all cases is analyzed through time series, Fourier and Hilbert
transforms, Poincar... | 2103.01297v1 |
2021-03-06 | Deep learning stochastic processes with QCD phase transition | It is non-trivial to recognize phase transitions and track dynamics inside a
stochastic process because of its intrinsic stochasticity. In this paper, we
employ the deep learning method to classify the phase orders and predict the
damping coefficient of fluctuating systems under Langevin's description. As a
concrete se... | 2103.04090v1 |
2021-03-12 | Longitudinal Modes of Bunched Beams with Weak Space Charge | Longitudinal collective modes of a bunched beam with a repulsive inductive
impedance (the space charge below transition or the chamber inductance above
it) are analytically described by means of reduction of the linearized Vlasov
equation to a parameter-less integral equation. For any multipolarity, the
discrete part o... | 2103.07523v4 |
2021-03-13 | Microscopic Calculation of Spin Torques in Textured Antiferromagnets | A microscopic calculation is presented for the spin-transfer torques (STT)
and damping torques in metallic antiferromagnets (AF). It is found that the
sign of the STT is opposite to that in ferromagnets because of the AF transport
character, and the current-to-STT conversion factor is enhanced near the AF gap
edge. The... | 2103.07634v1 |
2021-03-16 | On an inverse problem of nonlinear imaging with fractional damping | This paper considers the attenuated Westervelt equation in pressure
formulation. The attenuation is by various models proposed in the literature
and characterised by the inclusion of non-local operators that give power law
damping as opposed to the exponential of classical models. The goal is the
inverse problem of rec... | 2103.08965v1 |
2021-03-17 | Tunable exciton-optomechanical coupling in suspended monolayer MoSe2 | The strong excitonic effect in monolayer transition metal dichalcogenide
(TMD) semiconductors has enabled many fascinating light-matter interaction
phenomena. Examples include strongly coupled exciton-polaritons and nearly
perfect atomic monolayer mirrors. The strong light-matter interaction also
opens the door for dyn... | 2103.09897v2 |
2021-03-18 | Perturbation theory for solitons of the Fokas--Lenells equation : Inverse scattering transform approach | We present perturbation theory based on the inverse scattering transform
method for solitons described by an equation with the inverse linear dispersion
law $\omega\sim 1/k$, where $\omega$ is the frequency and $k$ is the wave
number, and cubic nonlinearity. This equation, first suggested by Davydova and
Lashkin for de... | 2103.10090v1 |
2021-04-07 | Indirect stability of a multidimensional coupled wave equations with one locally boundary fractional damping | In this work, we consider a system of multidimensional wave equations coupled
by velocities with one localized fractional boundary damping. First, using a
general criteria of Arendt- Batty, by assuming that the boundary control region
satisfy some geometric conditions, under the equality speed propagation and the
coupl... | 2104.03389v1 |
2021-04-10 | Free and forced vibrations of damped locally-resonant sandwich beams | This paper addresses the dynamics of locally-resonant sandwich beams, where
multi-degree-of-freedom viscously-damped resonators are periodically
distributed within the core matrix. Using an equivalent single-layer Timoshenko
beam model coupled with mass-spring-dashpot subsystems representing the
resonators, two solutio... | 2104.04870v1 |
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 |
2021-05-16 | Anatomy of inertial magnons in ferromagnets | We analyze dispersion relations of magnons in ferromagnetic nanostructures
with uniaxial anisotropy taking into account inertial terms, i.e. magnetic
nutation. Inertial effects are parametrized by damping-independent parameter
$\beta$, which allows for an unambiguous discrimination of inertial effects
from Gilbert damp... | 2105.07376v1 |
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 |
2021-08-02 | 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 |
2021-12-06 | 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 |
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