publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2020-01-09 | Photon correlation measurements of stochastic limit cycles emerging from high-$Q$ nonlinear silicon photonic crystal microcavities | We performed measurements of photon correlation [$g^{(2)}(\tau)$] in driven
nonlinear high-$Q$ silicon (Si) photonic crystal (PhC) microcavities. The
measured $g^{(2)}(\tau)$ exhibits a damped oscillatory behavior when input pump
power exceeds a critical value. From comparison between experiments and
simulations, we at... | 2001.02838v2 |
2020-01-12 | Linear programming bounds for quantum amplitude damping codes | Given that approximate quantum error-correcting (AQEC) codes have a
potentially better performance than perfect quantum error correction codes, it
is pertinent to quantify their performance. While quantum weight enumerators
establish some of the best upper bounds on the minimum distance of quantum
error-correcting code... | 2001.03976v1 |
2020-01-22 | Small data blow-up for the wave equation with a time-dependent scale invariant damping and a cubic convolution for slowly decaying initial data | In the present paper, we study the Cauchy problem for the wave equation with
a time-dependent scale invariant damping, i.e.$\frac{2}{1+t}\partial_t v$ and a
cubic convolution $(|x|^{-\gamma}*v^2)v$ with $\gamma\in (0,n)$, where
$v=v(x,t)$ is an unknown function on $\mathbb{R}^n\times[0,T)$. Our aim of the
present paper... | 2001.07985v1 |
2020-01-22 | Testing a Quantum Error-Correcting Code on Various Platforms | Quantum error correction plays an important role in fault-tolerant quantum
information processing. It is usually difficult to experimentally realize
quantum error correction, as it requires multiple qubits and quantum gates with
high fidelity. Here we propose a simple quantum error-correcting code for the
detected ampl... | 2001.07998v1 |
2020-01-22 | Dynamic state reconstruction of quantum systems subject to pure decoherence | The article introduces efficient quantum state tomography schemes for qutrits
and entangled qubits subject to pure decoherence. We implement the dynamic
state reconstruction method for open systems sent through phase-damping
channels which was proposed in: Open Syst. Inf. Dyn. 23, 1650019 (2016). In the
current article... | 2001.08167v1 |
2020-01-28 | Rate of Estimation for the Stationary Distribution of Stochastic Damping Hamiltonian Systems with Continuous Observations | We study the problem of the non-parametric estimation for the density $\pi$
of the stationary distribution of a stochastic two-dimensional damping
Hamiltonian system $(Z_t)_{t\in[0,T]}=(X_t,Y_t)_{t \in [0,T]}$. From the
continuous observation of the sampling path on $[0,T]$, we study the rate of
estimation for $\pi(x_0... | 2001.10423v1 |
2020-01-28 | Image polaritons in boron nitride for extreme polariton confinement with low losses | Polaritons in two-dimensional materials provide extreme light confinement
that is difficult to achieve with metal plasmonics. However, such tight
confinement inevitably increases optical losses through various damping
channels. Here we demonstrate that hyperbolic phonon polaritons in hexagonal
boron nitride can overcom... | 2001.10583v2 |
2020-02-06 | Fractional derivative order determination from harmonic oscillator damping factor | This article analysis differential equations which represents damped and
fractional oscillators. First, it is shown that prior to using physical
quantities in fractional calculus, it is imperative that they are turned
dimensionless. Afterwards, approximated expressions that relate the two
equations parameters for the c... | 2002.02479v1 |
2020-02-11 | A numerical damped oscillator approach to constrained Schrödinger equations | This article explains and illustrates the use of a set of coupled dynamical
equations, second order in a fictitious time, which converges to solutions of
stationary Schr\"{o}dinger equations with additional constraints. We include
three qualitative different numerical examples: the radial Schr\"{o}dinger
equation for t... | 2002.04400v2 |
2020-02-12 | Fast computation of optimal damping parameters for linear vibrational systems | We formulate the quadratic eigenvalue problem underlying the mathematical
model of a linear vibrational system as an eigenvalue problem of a
diagonal-plus-low-rank matrix $A$. The eigenvector matrix of $A$ has a
Cauchy-like structure. Optimal viscosities are those for which $trace(X)$ is
minimal, where $X$ is the solut... | 2002.04917v2 |
2020-02-13 | Low-loss two-dimensional plasmon modes in antimonene | The effects of spin-orbit (SOC) and electron-phonon coupling on the
collective excitation of doped monolayer Sb$_2$ are investigated using density
functional and many-body perturbation theories. The spin-orbit coupling is
exclusively important for the monolayer Sb$_2$ and it leads to the
reconstruction of the electroni... | 2002.05302v1 |
2020-02-13 | Quantization of the damped harmonic oscillator based on a modified Bateman Lagrangian | An approach to quantization of the damped harmonic oscillator (DHO) is
developed on the basis of a modified Bateman Lagrangian (MBL); thereby some
quantum mechanical aspects of the DHO are clarified. We treat the energy
operator for the DHO, in addition to the Hamiltonian operator that is
determined from the MBL and co... | 2002.05435v1 |
2020-02-17 | Charge Transfer Through Redox Molecular Junctions in Non-Equilibrated Solvents | Molecular conduction operating in dielectric solvent environments are often
described using kinetic rates based on Marcus theory of electron transfer at a
molecule-metal electrode interface. However, the successive nature of charge
transfer in such system implies that the solvent does not necessarily reach
equilibrium ... | 2002.06932v1 |
2020-02-19 | Diagnostics of plasma ionisation using torsional Alfén waves | Using the recently observed torsional Alfv\'en waves in solar prominences, we
determine the ionisation state of the plasma by taking into account that
Alfv\'en waves propagate in a partially ionised prominence plasma. We derive
the evolutionary equation of waves and compare the analytical solutions to
observations to d... | 2002.08441v1 |
2020-02-27 | Ultrafast magnetization dynamics in half-metallic Co$_2$FeAl Heusler alloy | We report on optically induced, ultrafast magnetization dynamics in the
Heusler alloy $\mathrm{Co_{2}FeAl}$, probed by time-resolved magneto-optical
Kerr effect. Experimental results are compared to results from electronic
structure theory and atomistic spin-dynamics simulations. Experimentally, we
find that the demagn... | 2002.12255v1 |
2020-04-14 | Stability results of an elastic/viscoelastic transmission problem of locally coupled waves with non smooth coefficients | We investigate the stabilization of a locally coupled wave equations with
only one internal viscoelastic damping of Kelvin-Voigt type. The main novelty
in this paper is that both the damping and the coupling coefficients are non
smooth. First, using a general criteria of Arendt-Batty, combined with an
uniqueness result... | 2004.06758v1 |
2020-04-16 | Ergodicity effects on transport-diffusion equations with localized damping | The main objective of this paper is to study the time decay of
transport-diffusion equation with inhomogeneous localized damping in the
multi-dimensional torus. The drift is governed by an autonomous Lipschitz
vector field and the diffusion by the standard heat equation with small
viscosity parameter $\nu$. In the firs... | 2004.07712v1 |
2020-04-17 | Majorization-Minimization-Based Levenberg--Marquardt Method for Constrained Nonlinear Least Squares | A new Levenberg--Marquardt (LM) method for solving nonlinear least squares
problems with convex constraints is described. Various versions of the LM
method have been proposed, their main differences being in the choice of a
damping parameter. In this paper, we propose a new rule for updating the
parameter so as to achi... | 2004.08259v3 |
2020-04-23 | Many-body Decay of the Gapped Lowest Excitation of a Bose-Einstein Condensate | We study the decay mechanism of the gapped lowest-lying excitation of a
quasi-pure box-trapped atomic Bose-Einstein condensate. Owing to the absence of
lower-energy modes, or direct coupling to an external bath, this excitation is
protected against one-body (linear) decay and the damping mechanism is
exclusively nonlin... | 2004.11363v1 |
2020-05-05 | Hydrodynamic memory can boost enormously driven nonlinear diffusion and transport | Hydrodynamic memory force or Basset force is known since the 19th-century.
Its influence on Brownian motion remains, however, mostly unexplored. Here, we
investigate its role in nonlinear transport and diffusion within a paradigmatic
model of tilted washboard potential. In this model, a giant enhancement of
driven diff... | 2005.01984v2 |
2020-05-05 | Diffraction losses of a Fabry-Perot cavity with nonidentical non-spherical mirrors | Optical cavities with both optimized resonant conditions and high quality
factors are important metrological tools. In particular, they are used for
laser gravitational wave (GW) detectors. It is necessary to suppress the
parametric instability by damping the resonant conditions of harmful higher
order optical modes (H... | 2005.02033v1 |
2020-05-11 | Sound Absorption in Partially Ionized Hydrogen Plasma and Heating Mechanism of Solar Chromosphere | The temperature dependence of rates of electron impact ionization and two
electrons recombination are calculated using Wannier cross section of electron
impact ionization of neutral hydrogen atom. Entropy production and power
dissipation are derived for the case when the ionization degree deviates from
its equilibrium ... | 2005.05056v4 |
2020-05-12 | Calculating RF current condensation with self-consistent ray-tracing | By exploiting the nonlinear amplification of the power deposition of RF
waves, current condensation promises new pathways to the stabilisation of
magnetic islands. We present a numerical analysis of current condensation,
coupling a geometrical optics treatment of wave propagation and damping to a
thermal diffusion equa... | 2005.05997v1 |
2020-05-13 | Sustaining a temperature difference | We derive an expression for the minimal rate of entropy that sustains two
reservoirs at different temperatures $T_0$ and $T_\ell$. The law displays an
intuitive $\ell^{-1}$ dependency on the relative distance and a characterisic
$\log^2 (T_\ell/T_0)$ dependency on the boundary temperatures. First we give a
back-of-enve... | 2005.06289v2 |
2020-05-13 | Numerical simulations of unsteady viscous incompressible flows using general pressure equation | In fluid dynamics, an important problem is linked to the knowledge of the
fluid pressure. Recently, another approach to study incompressible fluid flow
was suggested. It consists in using a general pressure equation (GPE) derived
from compressible Navier-Stokes equation. In this paper, GPE is considered and
compared wi... | 2005.06448v1 |
2020-05-15 | Response of the BGO Calorimeter to Cosmic Ray Nuclei in the DAMPE Experiment on Orbit | This paper is about a study on the response of the BGO calorimeter of DAMPE
experiment. Four elements in Cosmic Ray nuclei are used as sources for this
analysis. A feature resulting from the geomagnetic cutoff exhibits in the
energy spectrum, both in simulated and reconstructed data, and is compared
between them. | 2005.07621v1 |
2020-05-18 | Linear inviscid damping for shear flows near Couette in the 2D stably stratified regime | We investigate the linear stability of shears near the Couette flow for a
class of 2D incompressible stably stratified fluids. Our main result consists
of nearly optimal decay rates for perturbations of stationary states whose
velocities are monotone shear flows $(U(y),0)$ and have an exponential density
profile. In th... | 2005.09058v2 |
2020-05-19 | High-redshift Damped Ly-alpha Absorbing Galaxy Model Reproducing the N(HI)-Z Distribution | We investigate how damped Lyman-$\alpha$ absorbers (DLAs) at z ~ 2-3,
detected in large optical spectroscopic surveys of quasars, trace the
population of star-forming galaxies. Building on previous results, we construct
a model based on observed and physically motivated scaling relations in order
to reproduce the bivar... | 2005.09660v1 |
2020-05-20 | Dynamical phase transitions in dissipative quantum dynamics with quantum optical realization | We study dynamical phase transitions (DPT) in the driven and damped Dicke
model, realizable for example by a driven atomic ensemble collectively coupled
to a damped cavity mode. These DPTs are characterized by non-analyticities of
certain observables, primarily the overlap of time evolved and initial state.
Even though... | 2005.10013v2 |
2020-05-21 | The critical exponent for nonlinear damped $σ$-evolution equations | In this paper, we derive suitable optimal $L^p-L^q$ decay estimates, $1\leq
p\leq q\leq \infty$, for the solutions to the $\sigma$-evolution equation,
$\sigma>1$, with structural damping and power nonlinearity $|u|^{1+\alpha}$ or
$|u_t|^{1+\alpha}$, \[ u_{tt}+(-\Delta)^\sigma u +(-\Delta)^\theta
u_t=\begin{cases} |u|^{... | 2005.10946v1 |
2020-05-22 | Particle pairs and trains in inertial microfluidics | Staggered and linear multi-particle trains constitute characteristic
structures in inertial microfluidics. Using lattice-Boltzmann simulations, we
investigate their properties and stability, when flowing through microfluidic
channels. We confirm the stability of cross-streamline pairs by showing how
they contract or ex... | 2005.12701v2 |
2020-05-27 | Experimental diagnostics of entanglement swapping by a collective entanglement test | The paper reports on experimental diagnostics of entanglement swapping
protocol by means of collective entanglement witness. Our approach is suitable
to detect disturbances occurring in the preparation of quantum states, quantum
communication channel and imperfect Bell-state projection. More specifically we
demonstrate... | 2005.13292v2 |
2020-05-27 | Magnon antibunching in a nanomagnet | We investigate the correlations of magnons inside a nanomagnet and identify a
regime of parameters where the magnons become antibunched, i.e., where there is
a large probability for occupation of the single-magnon state. This antibunched
state is very different from magnons at thermal equilibrium and
microwave-driven c... | 2005.13637v1 |
2020-05-31 | Existence and uniqueness of strong solutions for the system of interaction between a compressible Navier-Stokes-Fourier fluid and a damped plate equation | The article is devoted to the mathematical analysis of a fluid-structure
interaction system where the fluid is compressible and heat conducting and
where the structure is deformable and located on a part of the boundary of the
fluid domain. The fluid motion is modeled by the compressible
Navier-Stokes-Fourier system an... | 2006.00488v1 |
2020-06-03 | Giant voltage control of spin Hall nano-oscillator damping | Spin Hall nano-oscillators (SHNOs) are emerging spintronic devices for
microwave signal generation and oscillator based neuromorphic computing
combining nano-scale footprint, fast and ultra-wide microwave frequency
tunability, CMOS compatibility, and strong non-linear properties providing
robust large-scale mutual sync... | 2006.02151v1 |
2020-06-05 | Controlling the nonlinear relaxation of quantized propagating magnons in nanodevices | Relaxation of linear magnetization dynamics is well described by the viscous
Gilbert damping processes. However, for strong excitations, nonlinear damping
processes such as the decay via magnon-magnon interactions emerge and trigger
additional relaxation channels. Here, we use space- and time-resolved
microfocused Bril... | 2006.03400v2 |
2020-06-08 | Rogue wave, interaction solutions to the KMM system | In this paper, the consistent tanh expansion (CTE) method and the truncated
Painlev$\acute{\rm e}$ analysis are applied to the Kraenkel-Manna-Merle (KMM)
system, which describes propagation of short wave in ferromagnets. Two series
of analytic solutions of the original KMM system (free of damping effect) are
obtained v... | 2006.04312v1 |
2020-06-10 | Interpolation between Residual and Non-Residual Networks | Although ordinary differential equations (ODEs) provide insights for
designing network architectures, its relationship with the non-residual
convolutional neural networks (CNNs) is still unclear. In this paper, we
present a novel ODE model by adding a damping term. It can be shown that the
proposed model can recover bo... | 2006.05749v4 |
2020-06-15 | Multimode cold-damping optomechanics with delayed feedback | We investigate the role of time delay in cold-damping optomechanics with
multiple mechanical resonances. For instantaneous electronic response, it was
recently shown in \textit{Phys. Rev. Lett. \textbf{123}, 203605 (2019)}, that a
single feedback loop is sufficient to simultaneously remove thermal noise from
many mecha... | 2006.08430v2 |
2020-06-12 | Analytic solution of the SEIR epidemic model via asymptotic approximant | An analytic solution is obtained to the SEIR Epidemic Model. The solution is
created by constructing a single second-order nonlinear differential equation
in $\ln S$ and analytically continuing its divergent power series solution such
that it matches the correct long-time exponential damping of the epidemic
model. This... | 2006.09818v2 |
2020-06-20 | On The Energy Transfer To High Frequencies In The Damped/Driven Nonlinear Schrödinger Equation (Extended Version) | We consider a damped/driven nonlinear Schr\"odinger equation in an $n$-cube
$K^{n}\subset\mathbb{R}^n$, $n$ is arbitrary, under Dirichlet boundary
conditions \[ u_t-\nu\Delta u+i|u|^2u=\sqrt{\nu}\eta(t,x),\quad x\in
K^{n},\quad u|_{\partial K^{n}}=0, \quad \nu>0, \] where $\eta(t,x)$ is a
random force that is white in ... | 2006.11518v2 |
2020-06-23 | The Contour Method: a new approach to finding modes of non-adiabatic stellar pulsations | The contour method is a new approach to calculating the non-adiabatic
pulsation frequencies of stars. These frequencies can be found by solving for
the complex roots of a characteristic equation constructed from the linear
non-adiabatic stellar pulsation equations. A complex-root solver requires an
initial trial freque... | 2006.13223v2 |
2020-06-24 | The Complex Permeability of Split-Ring Resonator Arrays Measured at Microwave Frequencies | We have measured the relative permeability of split-ring resonator (SRR)
arrays used in metamaterials designed to have $\mu^\prime< 0$ over a narrow
range of microwave frequencies. The SRR arrays were loaded into the bore of a
loop-gap resonator (LGR) and reflection coefficient measurements were used to
determine both ... | 2006.13861v1 |
2020-06-25 | Sharp decay estimates and asymptotic behaviour for 3D magneto-micropolar fluids | We characterize the $L^2$ decay rate of solutions to the 3D
magneto-micropolar system in terms of the decay character of the initial datum.
Due to a linear damping term, the micro-rotational field has a faster decay
rate. We also address the asymptotic behaviour of solutions by comparing them
to solutions to the linear... | 2006.14427v2 |
2020-06-27 | Measurement-Based Estimation of System State Matrix for AC Power Systems with Integrated VSCs | In this paper, a wide-area measurement system (WAMS)-based method is proposed
to estimate the system state matrix for AC system with integrated voltage
source converters (VSCs) and identify the electromechanical modes. The proposed
method is purely model-free, requiring no knowledge of accurate network
topology and sys... | 2006.15244v1 |
2020-06-29 | Quadratic optomechanical cooling of a cavity-levitated nanosphere | We report on cooling the center-of-mass motion of a nanoparticle due to a
purely quadratic coupling between its motion and the optical field of a high
finesse cavity. The resulting interaction gives rise to a Van der Pol nonlinear
damping, which is analogous to conventional parametric feedback where the
cavity provides... | 2006.16103v1 |
2020-07-01 | Entanglement of quantum oscillators coupled to different heat baths | We study the non-equilibrium dynamics of two coupled oscillators interacting
with their own heat baths of quantum scalar fields at different temperature
$T_1$ and $T_2$ with bilinear couplings between them. We particularly focus on
the entanglement or inseparability property of their quantum states. The
critical temper... | 2007.00288v2 |
2020-07-01 | Stabilization of the critical and subcritical semilinear inhomogeneous and anisotropic elastic wave equation | {\bf Abstract} \,\,We prove exponential decay of the critical and subcritical
semilinear inhomogeneous and anisotropic elastic wave equation with locally
distributed damping on bounded domain. One novelty compared to previous
results, is to give a checkable condition of the inhomogeneous and anisotropic
medias. Another... | 2007.00813v1 |
2020-07-06 | Collective excitations and universal broadening of cyclotron absorption in Dirac semimetals in a quantizing magnetic field | The spectrum of electromagnetic collective excitations in Dirac semimetals
placed in a quantizing magnetic field is considered. We have found the Landau
damping regions using the energy and momentum conservation law for allowed
transitions between one-particle states of electron excitations. Analysis of
dispersion equa... | 2007.02979v1 |
2020-07-06 | Fast convex optimization via a third-order in time evolution equation: TOGES-V an improved version of TOGES | In a Hilbert space setting H, for convex optimization, we analyze the fast
convergence properties as t tends to infinity of the trajectories generated by
a third-order in time evolution system. The function f to minimize is supposed
to be convex, continuously differentiable, with a nonempty set of minimizers.
It enters... | 2007.03062v1 |
2021-02-01 | Performance and limits of feedback cooling methods for levitated oscillators: a direct comparison | Cooling the centre-of-mass motion is an important tool for levitated
optomechanical systems, but it is often not clear which method can practically
reach lower temperatures for a particular experiment. We directly compare the
parametric and velocity feedback damping methods, which are used extensively
for cooling the m... | 2102.01060v3 |
2021-02-16 | A homogenized damping model for the propagation of elastic wave in a porous solid | This paper develops an averaging technique based on the combination of the
eigenfunction expansion method and the collaboration method to investigate the
multiple scattering effect of the SH wave propagation in a porous medium. The
semi-analytical averaging technique is conducted using Monto Carlo method to
understand ... | 2102.08334v1 |
2021-02-11 | Semi-linear Poisson-mediated Flocking in a Cucker-Smale Model | We propose a family of compactly supported parametric interaction functions
in the general Cucker-Smale flocking dynamics such that the mean-field
macroscopic system of mass and momentum balance equations with non-local
damping terms can be converted from a system of partial integro-differential
equations to an augment... | 2102.08772v1 |
2021-02-22 | Robust formation of nanoscale magnetic skyrmions in easy-plane thin film multilayers with low damping | We experimentally demonstrate the formation of room-temperature skyrmions
with radii of about 25\,nm in easy-plane anisotropy multilayers with
interfacial Dzyaloshinskii-Moriya interaction (DMI). We detect the formation of
individual magnetic skyrmions by magnetic force microscopy and find that the
skyrmions are stable... | 2102.11117v1 |
2021-02-22 | Asymptotics of solutions with a compactness property for the nonlinear damped Klein-Gordon equation | We consider the nonlinear damped Klein-Gordon equation \[
\partial_{tt}u+2\alpha\partial_{t}u-\Delta u+u-|u|^{p-1}u=0 \quad \text{on} \ \
[0,\infty)\times \mathbb{R}^N \] with $\alpha>0$, $2 \le N\le 5$ and energy
subcritical exponents $p>2$. We study the behavior of solutions for which it is
supposed that only one non... | 2102.11178v1 |
2021-02-23 | The tipping effect of delayed interventions on the evolution of COVID-19 incidence | We combine infectious disease transmission and the non-pharmaceutical
intervention (NPI) response to disease incidence into one closed model
consisting of two coupled delay differential equations for the incidence rate
and the time-dependent reproduction number. The model contains three free
parameters, the initial rep... | 2102.11750v1 |
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 |
2021-11-01 | 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 |
2021-11-05 | Giant oscillatory Gilbert damping in superconductor/ferromagnet/superconductor junctions | Interfaces between materials with differently ordered phases present unique
opportunities for exotic physical properties, especially the interplay between
ferromagnetism and superconductivity in the ferromagnet/superconductor
heterostructures. The investigation of zero- and pi-junctions has been of
particular interest ... | 2111.03233v1 |
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 |
2022-07-07 | Control of Oscillatory Temperature Field in a Building via Damping Assignment to Nonlinear Koopman Mode | This paper addresses a control problem on air-conditioning systems in
buildings that is regarded as a control practice of nonlinear
distributed-parameter systems. Specifically, we consider the design of a
controller for suppressing an oscillatory response of in-room temperature
field. The main idea in this paper is to ... | 2207.03219v1 |
2022-07-07 | New perspectives on transient stability between grid-following and grid-forming VSCs | The grid-following and grid-forming controls in voltage-source converters are
considered as different operation modes and the synchronization mechanism of
them are studied separately. In this article, the intrinsic relationships
between gridfollowing and grid-forming controlled converters are established as
follows: 1)... | 2207.03273v1 |
2022-07-11 | Rapid Stabilization of Timoshenko Beam by PDE Backstepping | In this paper, we present a rapid boundary stabilization of a Timoshenko beam
with anti-damping and anti-stiffness at the uncontrolled boundary, by using PDE
backstepping. We introduce a transformation to map the Timoshenko beam states
into a (2+2) x (2+2) hyperbolic PIDE-ODE system. Then backstepping is applied
to obt... | 2207.04746v1 |
2022-07-20 | MsSpec-DFM (Dielectric function module): Towards a multiple scattering approach to plasmon description | We present here the MsSpec Dielectric Function module (MsSpec-DFM), which
generates dielectric functions in an electron gas or a liquid, either isolated
or embedded into an environment. In addition to standard models such as the
plasmon pole and the RPA, this module also provides more involved methods
incorporating loc... | 2207.09924v1 |
2022-07-25 | Extreme bursting events via pulse-shaped explosion in mixed Rayleigh-Lienard nonlinear oscillator | We study the dynamics of a parametrically and externally driven
Rayleigh-Lienard hybrid model and report the emergence of extreme bursting
events due to a novel pulse-shaped explosion mechanism. The system exhibits
complex periodic and chaotic bursting patterns amid small oscillations as a
function of excitation freque... | 2207.11916v1 |
2022-07-26 | The Global Existence of Martingale Solutions to Stochastic Compressible Navier-Stokes Equations with Density-dependent Viscosity | The global existence of martingale solutions to the compressible
Navier-Stokes equations driven by stochastic external forces, with
density-dependent viscosity and vacuum, is established in this paper. This work
can be regarded as a stochastic version of the deterministic Navier-Stokes
equations \cite{Vasseur-Yu2016} (... | 2207.12835v5 |
2017-04-03 | Sensing Coherent Phonons with Two-photon Interference | Detecting coherent phonons pose different challenges compared to coherent
photons due to the much stronger interaction between phonons and matter. This
is especially true for high frequency heat carrying phonons, which are
intrinsic lattice vibrations experiencing many decoherence events with the
environment, and are t... | 1704.00446v1 |
2017-04-03 | Simulating spin-boson models with trapped ions | We propose a method to simulate the dynamics of spin-boson models with small
crystals of trapped ions where the electronic degree of freedom of one ion is
used to encode the spin while the collective vibrational degrees of freedom are
employed to form an effective harmonic environment. The key idea of our
approach is t... | 1704.00629v1 |
2017-04-07 | Coherent-induced state ordering with fixed mixedness | In this paper, we study coherence-induced state ordering with Tsallis
relative entropy of coherence, relative entropy of coherence and $l_{1}$ norm
of coherence. Firstly, we show that these measures give the same ordering for
single-qubit states with a fixed mixedness or a fixed length along the
direction $\sigma_{z}$.... | 1704.02244v1 |
2017-04-13 | A possible connection between the spin temperature of damped Lyman-alpha absorption systems and star formation history | We present a comprehensive analysis of the spin temperature/covering factor
degeneracy, T/f, in damped Lyman-alpha absorption systems. By normalising the
upper limits and including these via a survival analysis, there is, as
previously claimed, an apparent increase in T/f with redshift at z > 1.
However, when we accoun... | 1704.04294v2 |
2017-04-17 | Magnetic field line random walk in two-dimensional dynamical turbulence | The field line random walk (FLRW) of magnetic turbulence is one of the
important topics in plasma physics and astrophysics. In this article by using
the field line tracing method mean square displacements (MSD) of FLRW is
calculated in all possible length scales for pure two-dimensional turbulence
with damping dynamica... | 1704.05059v3 |
2017-04-19 | Quantum simulation of quantum channels in nuclear magnetic resonance | We propose and experimentally demonstrate an efficient framework for the
quantum simulation of quantum channels in NMR. Our approach relies on the
suitable decomposition of non-unitary operators in a linear combination of $d$
unitary ones, which can be then experimentally implemented with the assistance
of a number of ... | 1704.05593v2 |
2017-04-24 | Beating the Classical Limits of Information Transmission using a Quantum Decoder | Encoding schemes and error-correcting codes are widely used in information
technology to improve the reliability of data transmission over real-world
communication channels. Quantum information protocols can further enhance the
performance in data transmission by encoding a message in quantum states,
however, most prop... | 1704.07036v2 |
2017-04-24 | Quasilinear diffusion coefficients in a finite Larmor radius expansion for ion cyclotron heated plasmas | In this paper, a reduced model of quasilinear diffusion by a small Larmor
radius approximation is derived to couple the Maxwell's equations and the
Fokker-Planck equation self-consistently for ion cyclotron range of frequency
waves in a tokamak. The reduced model ensures the important properties of the
full model by Ke... | 1704.07283v1 |
2017-04-27 | Chirality-induced Antisymmetry in Magnetic Domain-Wall Speed | In chiral magnetic materials, numerous intriguing phenomena such as built in
chiral magnetic domain walls (DWs) and skyrmions are generated by the
Dzyaloshinskii Moriya interaction (DMI). The DMI also results in asymmetric DW
speed under in plane magnetic field, which provides a useful scheme to measure
the DMI strengt... | 1704.08751v1 |
2017-05-04 | Phase-space mixing in dynamically unstable, integrable few-mode quantum systems | Quenches in isolated quantum systems are currently a subject of intense
study. Here, we consider quantum few-mode systems that are integrable in their
classical mean-field limit and become dynamically unstable after a quench of a
system parameter. Specifically, we study a Bose-Einstein condensate (BEC) in a
double-well... | 1705.01702v1 |
2017-05-11 | Quantum Correlations and Bell Inequality Violation under Decoherence | Quantum Correlations are studied extensively in quantum information domain.
Entanglement Measures and Quantum Discord are good examples of these actively
studied correlations. Detection of violation in Bell inequalities is also a
widely active area in quantum information theory world. In this work, we
revisit the probl... | 1705.03882v2 |
2017-05-18 | Local and global existence of solutions to a strongly damped wave equation of the $p$-Laplacian type | This article focuses on a quasilinear wave equation of $p$-Laplacian type: $$
u_{tt} - \Delta_p u - \Delta u_t=0$$ in a bounded domain
$\Omega\subset\mathbb{R}^3$ with a sufficiently smooth boundary
$\Gamma=\partial\Omega$ subject to a generalized Robin boundary condition
featuring boundary damping and a nonlinear sour... | 1705.06696v2 |
2017-05-23 | Unifying description of the damping regimes of a stochastic particle in a periodic potential | We analyze the classical problem of the stochastic dynamics of a particle
confined in a periodic potential, through the so called Il'in and Khasminskii
model, with a novel semi-analytical approach. Our approach gives access to the
transient and the asymptotic dynamics in all damping regimes, which are
difficult to inve... | 1705.08083v2 |
2017-05-27 | Experimental Observation of Electron-Acoustic Wave Propagation in Laboratory Plasma | In the field of fundamental plasma waves, direct observation of
electron-acoustic wave (EAW) propagation in laboratory plasmas remains a
challenging problem, mainly because of heavy damping. In the MaPLE device, the
wave is observed and seen to propagate with phase velocity $\sim1.8$ times the
electron thermal velocity... | 1705.09806v1 |
2017-06-08 | Superconductivity around nematic quantum critical point in two-dimensional metals | We study the properties of $s$-wave superconductivity induced around a
nematic quantum critical point in two-dimensional metals. The strong Landau
damping and the Cooper pairing between incoherent fermions have dramatic mutual
influence on each other, and hence should be treated on an equal footing. This
problem is add... | 1706.02583v2 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.