publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2016-05-27 | Scalar field quasinormal frequencies of Reissner-Nordström black hole surrounded by quintessence by using he continued fraction method | We evaluate the quasinormal modes of massless scalar field around
Reissner-Nordstr$\ddot{\text{o}}$m black hole surrounded by a static and
spherically symmetric quintessence by using the continued fraction method. The
appropriate Frobenius series for three special cases of the quintessence
parameter $ \epsilon = -1/3, ... | 1606.00703v3 |
2016-06-06 | Weak invariants of time-dependent quantum dissipative systems | The concept of weak invariant is introduced. Then, the weak invariants
associated with time-dependent quantum dissipative systems are discussed in the
context of master equations of the Lindblad type. In particular, with the help
of the su(1,1) Lie-algebraic structure, the weak invariant is explicitly
constructed for t... | 1606.01767v4 |
2016-06-09 | Stabilization of second order nonlinear equations with variable delay | For a wide class of second order nonlinear non-autonomous models, we
illustrate that combining proportional state control with the feedback that is
proportional to the derivative of the chaotic signal, allows to stabilize
unstable motions of the system. The delays are variable, which leads to more
flexible controls per... | 1606.03045v1 |
2016-06-09 | Infrared behavior of dipolar Bose systems at low temperatures | We rigorously discuss the infrared behavior of the uniform three dimensional
dipolar Bose systems. In particular, it is shown that low-temperature physics
of the system is controlled by two parameters, namely isothermal
compressibility and intensity of the dipole-dipole interaction. By using
hydrodynamic approach we ca... | 1606.03047v2 |
2016-06-30 | Skyrmion dynamics in a chiral magnet driven by periodically varying spin currents | In this work, we investigated the spin dynamics in a slab of chiral magnets
induced by an alternating (ac) spin current. Periodic trajectories of the
skyrmion in real space are discovered under the ac current as a result of the
Magnus and viscous forces, which originate from the Gilbert damping, the spin
transfer torqu... | 1606.09326v2 |
2016-07-07 | Two-well atomic Bose-Hubbard analogues of optical cavities | We propose and analyse analogs of optical cavities for atoms using two-well
Bose-Hubbard models with pumping and losses. With one well pumped, we find that
both the mean-field dynamics and the quantum statistics show a quantitative
dependence on the choice of damped well. Both the systems we analyse remain far
from equ... | 1607.01911v1 |
2016-07-10 | Gravitational Waves in Effective Quantum Gravity | In this short paper we investigate quantum gravitational effects on
Einstein's equations using effective field theory techniques. We consider the
leading order quantum gravitational correction to the wave equation. Besides
the usual massless mode, we find a pair of modes with complex masses. These
massive particles hav... | 1607.02773v1 |
2016-07-11 | A bifurcation analysis for the Lugiato-Lefever equation | The Lugiato-Lefever equation is a cubic nonlinear Schr\"odinger equation,
including damping, detuning and driving, which arises as a model in nonlinear
optics. We study the existence of stationary waves which are found as solutions
of a four-dimensional reversible dynamical system in which the evolutionary
variable is ... | 1607.02862v1 |
2016-08-08 | An analytic technique for the solutions of nonlinear oscillators with damping using the Abel Equation | Using the Chiellini condition for integrability we derive explicit solutions
for a generalized system of Riccati equations $\ddot{x}+\alpha
x^{2n+1}\dot{x}+x^{4n+3}=0$ by reduction to the first-order Abel equation
assuming the parameter $\alpha\ge 2\sqrt{2(n+1)}$. The technique, which was
proposed by Harko \textit{et a... | 1608.02324v1 |
2016-08-11 | Phenomenological plasmon broadening and relation to the dispersion | Pragmatic ways of including lifetime broadening of collective modes in the
electron liquid are critically compared. Special focus lies on the impact of
the damping parameter onto the dispersion. It is quantitatively exemplified for
the two-dimensional case, for both, the charge (`sheet'-)plasmon and the
spin-density pl... | 1608.03432v1 |
2016-08-16 | Quasistatic contact problem with unilateral constraint for elastic-viscoplastic materials | This paper consists of two parts. In the first part we prove the unique
solvability for the abstract variational-hemivariational inequality with
history-dependent operator. The proof is based on the existing result for the
static variational-hemivariational inequality and a fixed point argument. In
the second part, we ... | 1608.04660v1 |
2016-08-27 | Plasma dynamics of a laser filamentation-guided spark | We investigate experimentally the plasma dynamics of a centimeter-scale,
laser filamentation-guided spark discharge. Using electrical and optical
diagnostics to study monopolar discharges with varying current pulses we show
that plasma decay is dominated by free electron recombination if the current
decay time is short... | 1608.07677v1 |
2016-09-01 | A mathematical consideration of vortex thinning in 2D turbulence | In two dimensional turbulence, vortex thinning process is one of the
attractive mechanism to explain inverse energy cascade in terms of vortex
dynamics. By direct numerical simulation to the two-dimensional Navier-Stokes
equations with small-scale forcing and large-scale damping, Xiao-Wan-Chen-Eyink
(2009) found an evi... | 1609.00107v1 |
2016-09-22 | Primordial density and BAO reconstruction | We present a new method to reconstruct the primordial (linear) density field
using the estimated nonlinear displacement field. The divergence of the
displacement field gives the reconstructed density field. We solve the
nonlinear displacement field in the 1D cosmology and show the reconstruction
results. The new recons... | 1609.07041v1 |
2016-09-26 | Transverse Magneto-Optical Kerr Effect in Active Magneto-Plasmonic Structures | We propose a novel method to enhance the transverse magneto-optical Kerr
effect (TMOKE) in the magneto-plasmonic (MP) nanostructures by means of the
active dielectric layer. We report the theoretical analysis of the
magnetoplasmonic structure with a ferromagnetic dielectric doped with
rear-earth ions (Nd3+) as the exam... | 1609.07883v1 |
2016-09-30 | Stochastic pure state representation for open quantum systems | We show that the usual master equation formalism of Markovian open quantum
systems is completely equivalent to a certain state vector formalism. The state
vector of the system satisfies a given frictional Schr\"odinger equation except
for random instant transitions of discrete nature. Hasse's frictional
Hamiltonian is ... | 1609.09636v1 |
2016-10-27 | Direct-dynamical entanglement-discord relations | In this article, by considering Bell-diagonal two-qubit initial states
submitted to local dynamics generated by the phase damping, bit flip, phase
flip, bit-phase flip, and depolarizing channels, we report some elegant
direct-dynamical relations between geometric measures of entanglement and
discord. The complex scenar... | 1610.09030v2 |
2016-10-31 | Pseudo steady-state non-Gaussian EPR-steering of massive particles in pumped and damped Bose-Hubbard dimers | We propose and analyse a pumped Bose-Hubbard dimer as a source of
continuous-variable Einstein-Podolsky-Rosen (EPR) steering with non-Gaussian
statistics. We use the truncated Wigner representation to calculate third and
fourth order cumulants, finding clear signals of non-Gaussianity. We also
calculate the products of... | 1610.09820v1 |
2016-11-04 | Quantum correlations and entanglement in a model comprised of a short chain of nonlinear oscillators | We discuss a model comprised of a chain of three Kerr-like nonlinear
oscillators pumped by two modes of external coherent field. We show that the
system can be treated as nonlinear quantum scissors and behave as a three-qubit
model. For such situation, different types of tripartite entangled states can
be generated, ev... | 1611.01334v1 |
2016-11-10 | Unifying Suspension and Granular flows near Jamming | Rheological properties of dense flows of hard particles are singular as one
approaches the jamming threshold where flow ceases, both for granular flows
dominated by inertia, and for over-damped suspensions. Concomitantly, the
lengthscale characterizing velocity correlations appears to diverge at jamming.
Here we review... | 1611.03243v1 |
2016-11-23 | Interchange instability and transport in matter-antimatter plasmas | Symmetric electron-positron plasmas in inhomogeneous magnetic fields are
intrinsically subject to interchange instability and transport. Scaling
relations for the propagation velocity of density blob perturbations relevant
to transport in isothermal magnetically confined electron-positron plasmas are
deduced, including... | 1611.07836v1 |
2016-12-01 | Superfluidity in Bose-Hubbard circuits | A semiclassical theory is provided for the metastability regime-diagram of
atomtronic superfluid circuits. Such circuits typically exhibit
high-dimensional chaos; and non-linear resonances that couple the Bogoliubov
excitations manifest themselves. Contrary to the expectation these resonances
do not originate from the ... | 1612.00251v2 |
2016-12-03 | The formation of long-lived high-correlated states of light and polarization in high-quality semiconductor microcavity at the resonant laser excitation | The correlation function of radiation from a high-quality semiconductor
microcavity at the resonant laser excitation demonstrates oscillations with
surprisingly long-period and damping times of a nanosecond range. It was shown
that the oscillations are not attributed to weak Rabi interaction between
long-lived exciton ... | 1612.00954v1 |
2016-12-05 | Perturbative dissipation dynamics of a weakly driven Jaynes-Cummings system | We generalize a microscopic master equation method to study the dissipation
dynamics of Jaynes-Cummings two-level system with a weak external driving.
Using perturbative analysis to extend the damping bases theory, we derive the
corrected Rabi oscillation and vaccum Rabi splitting analytically. The
evolution of the dec... | 1612.01248v1 |
2016-12-06 | On renormalised solution for thermomechanical problem in perfect - plasticity | We consider the quasi-static evolution of the thermo-plasticity model in
which the evolution equation law for the inelastic strain is given by the
Prandtl-Reuss flow rule. The thermal part of the Cauchy stress tensor is not
linearised in the neighbourhood of a references temperature. This nonlinear
thermal part imposed... | 1612.01886v1 |
2016-12-16 | Relaxation mechanism driven by spin angular momentum absorption throughout antiferromagnetic phase transition in NiFe surface oxides | We report an alternative mechanism for the physical origin of the
temperature-dependent ferromagnetic relaxation of Permalloy (NiFe) thin films.
Through spin-pumping experiments, we demonstrate that the peak in the
temperature-dependence of NiFe damping can be understood in terms of enhanced
spin angular momentum absor... | 1612.05556v1 |
2016-12-16 | On the rotationally driven pevatron in the centre of the Milky Way | Based on the collective linear and nonlinear processes in a magnetized plasma
surrounding the black hole at the galactic center (GC), an acceleration
mechanism is proposed to explain the recent detection/discovery of PeV protons.
In a two stage process, the gravitation energy is first converted to the
electrical energy... | 1612.05591v1 |
2016-12-26 | Microscopic derivation of the hydrodynamics of active-Brownian-particle suspensions | We derive the hydrodynamic equations of motion for a fluid of active
particles described by under- damped Langevin equations that reduce to the
Active-Brownian-Particle model, in the overdamped limit. The contraction into
the hydrodynamic description is performed by locally averaging the par- ticle
dynamics with the no... | 1612.08404v1 |
2016-12-29 | Anomalous temperature-dependent heat transport in one-dimensional momentum-conserving systems with soft-type interparticle interaction | We here numerically investigate the heat transport behavior in a
one-dimensional lattice with a soft-type (ST) anharmonic interparticle
interaction. It is found that with the increase of system's temperature, while
the introduction of ST anharmonicity softens phonons and decreases their
velocities, this type of nonline... | 1612.09080v2 |
2017-01-01 | Analysis of a remarkable singularity in a nonlinear DDE | In this work we investigate the dynamics of the nonlinear DDE
(delay-differential equation)
x''(t)+x(t-T)+x(t)^3=0
where T is the delay. For T=0 this system is conservative and exhibits no
limit cycles. For T>0, no matter how small, an infinite number of limit cycles
exist, their amplitudes going to infinity in the... | 1701.00201v1 |
2017-01-12 | Molecular Plasmonics: strong coupling at the low molecular density limit | We study the strong coupling between the molecular excited state and the
plasmonic modes of silver hole arrays with a resonant frequency very close to
the asymptotic line of the plasmonic dispersion relation, at the nonlinear
regime. We demonstrate that the strong coupling regime can be achieved between
the two sub-sys... | 1701.03402v2 |
2017-01-22 | Super quantum discord for general two qubit X states | The exact solutions of the super quantum discord are derived for general two
qubit X states in terms of a one-variable function. Several exact solutions of
the super quantum discord are given for the general X-state over nontrivial
regions of a seven dimensional manifold. It is shown that the super quantum
discord of t... | 1701.06177v2 |
2017-01-26 | Navier-Stokes-Voigt equations with memory in 3D lacking instantaneous kinematic viscosity | We consider a Navier-Stokes-Voigt fluid model where the instantaneous
kinematic viscosity has been completely replaced by a memory term incorporating
hereditary effects, in presence of Ekman damping. The dissipative character of
our model is weaker than the one where hereditary and instantaneous viscosity
coexist, prev... | 1701.07845v1 |
2017-01-28 | Quantum discord protection of a two-qutrit V-type atomic system from decoherence by partially collapsing measurements | In this paper, by exploiting the weak measurement and quantum measurement re-
versal (WMQMR) procedure, we propose a scheme to show how one can protect the
geometric quantum discord (GQD) of a two-qutrit V-type atomic system each of
which interacts with a dissipative reservoir independently. We examine the
scheme for t... | 1701.08278v2 |
2017-02-03 | Global existence and decay rate of strong solution to incompressible Oldroyd type model equations | This paper investigates the global existence and the decay rate in time of a
solution to the Cauchy problem for an incompressible Oldroyd model with a
deformation tensor damping term. There are three major results. The first is
the global existence of the solution for small initial data. Second, we derive
the sharp tim... | 1702.00902v2 |
2017-02-05 | Hydrodynamic fluctuations near a critical endpoint and Hanbury Brown-Twiss interferometry | The field of high energy nuclear collisions has witnessed a surge of interest
in the role played by hydrodynamic fluctuations. Hydrodynamic fluctuations may
have significant effects on matter created in heavy-ion accelerators whose
trajectories in the plane of temperature versus chemical potential pass near a
possible ... | 1702.01368v1 |
2017-02-20 | The HTL resumed propagators in the light cone gauge | The expression of the HTL resumed gluon propagator in the light cone gauge is
derived. In the real time mechanism, using the Mandelstam Leibbrant
prescription of $(n\cdot K)^{-1}$, we calculate the transverse and longitudinal
parts of the gluon HTL self-energy and prove the transverse and longitudinal
parts do not have... | 1702.05890v2 |
2017-02-27 | Magnetization reversal by superconducting current in $\varphi_0$ Josephson junctions | We study magnetization reversal in a $\varphi_0$ Josephson junction with
direct coupling between magnetic moment and Josephson current. Our simulations
of magnetic moment dynamics show that by applying an electric current pulse, we
can realize the full magnetization reversal. We propose different protocols of
full magn... | 1702.08394v4 |
2017-03-02 | Integrable RCS as a proposed replacement for Fermilab Booster | Integrable optics is an innovation in particle accelerator design that
potentially enables a greater betatron tune spread and damps collective
instabilities. An integrable rapid-cycling synchrotron (RCS) would be an
effective replacement for the Fermilab Booster, as part of a plan to reach
multi-MW beam power at 120 Ge... | 1703.00952v1 |
2017-03-03 | Spin-orbit effective fields in Pt/GdFeCo bilayers | In the increasing interests on spin-orbit torque (SOT) with various magnetic
materials, we investigated SOT in rare earth-transition metal ferrimagnetic
alloys. The harmonic Hall measurements were performed in Pt/GdFeCo bilayers to
quantify the effective fields resulting from the SOT. It is found that the
damping-like ... | 1703.00995v1 |
2017-03-06 | Antibunching in an optomechanical oscillator | We theoretically analyze antibunching of the phonon field in an
optomechanical oscillator employ- ing the membrane-in-the-middle geometry. More
specifically, a single-mode mechanical oscillator is quadratically coupled to a
single-mode cavity field in the regime in which the cavity dissipation is a
dominant source of d... | 1703.01706v1 |
2017-03-07 | Dark matter kinetic decoupling with a light particle | We argue that the acoustic damping of the matter power spectrum is not a
generic feature of the kinetic decoupling of dark matter, but even the
enhancement can be realized depending on the nature of the kinetic decoupling
when compared to that in the standard cold dark matter model. We consider a
model that exhibits a ... | 1703.02338v1 |
2017-03-22 | A review on Asteroseismology | Over the last decade, thanks to the successful space missions launched to
detect stellar pulsations, Asteroseismology has produced an extraordinary
revolution in astrophysics, unveiling a wealth of results on structural
properties of stars over a large part of the H-R diagram. Particularly
impressive has been the devel... | 1703.07604v2 |
2017-03-30 | Behavior of the impurity atom in a weakly-interacting Bose gas | We studied the properties of a single impurity atom immersed in a dilute Bose
condensate at low temperatures. In particular, we perturbatively obtained the
momentum dependence of the impurity spectrum and damping. By means of the
Brillouin-Wigner perturbation theory we also calculated the self-energy both
for attractiv... | 1703.10390v1 |
2017-03-31 | A Fourier-Chebyshev Spectral Method for Cavitation Computation in Nonlinear Elasticity | A Fourier-Chebyshev spectral method is proposed in this paper for solving the
cavitation problem in nonlinear elasticity. The interpolation error for the
cavitation solution is analyzed, the elastic energy error estimate for the
discrete cavitation solution is obtained, and the convergence of the method is
proved. An a... | 1703.10939v1 |
2017-07-13 | Clock frequency estimation under spontaneous emission | We investigate the quantum dynamics of a driven two-level system under
spontaneous emission and its application in clock frequency estimation. By
using a Lindblad equation to describe the system, we analytically obtain its
exact solutions, which show three different regimes: Rabi oscillation, damped
oscillation and ove... | 1707.03958v1 |
2017-07-20 | Fluid structure system with boundary conditions involving the pressure | We study a coupled fluid-structure system involving boundary conditions on
the pressure. The fluid is described by the incompressible Navier--Stokes
equations in a 2D rectangular type domain where the upper part of the domain is
described by a damped Euler--Bernoulli beam equation. Existence and uniqueness
of local str... | 1707.06382v2 |
2017-07-25 | The Effect of Electron Lens as Landau Damping Device on Single Particle Dynamics in HL-LHC | An electron lens can serve as an effective mechanism for suppressing coherent
instabilities in high intensity storage rings through nonlinear amplitude
dependent betatron tune shift. However, the addition of a strong localized
nonlinear focusing element to the accelerator lattice may lead to undesired
effects in partic... | 1707.08239v1 |
2017-08-11 | Gradient expansion formalism for generic spin torques | We propose a new quantum-mechanical formalism to calculate spin torques based
on the gradient expansion, which naturally involves spacetime gradients of the
magnetization and electromagnetic fields. We have no assumption in the
small-amplitude formalism or no difficulty in the SU($2$) gauge transformation
formalism. As... | 1708.03424v1 |
2017-08-21 | Fundamental models in nonlinear acoustics part I. Analytical comparison | This work is concerned with the study of fundamental models from nonlinear
acoustics. In Part~I, a hierarchy of nonlinear damped wave equations arising in
the description of sound propagation in thermoviscous fluids is deduced. In
particular, a rigorous justification of two classical models, the Kuznetsov and
Westervel... | 1708.06099v1 |
2017-09-07 | Short Wavelength Geodesic Acoustic Mode Excitation by Energetic Particles | Taking the collisionless damping of geodesic acoustic mode (GAM) as an
example, the physics processes underlying wave particle resonances in the short
wavelength limit are clarified. As illus- trative application, GAM excitation
by energetic particles in short wavelength limit is investigated assuming a
single pitch an... | 1709.02085v1 |
2017-09-12 | Convex approximations of quantum channels | We address the problem of optimally approximating the action of a desired and
unavailable quantum channel $\Phi $ having at our disposal a single use of a
given set of other channels $\{\Psi_i \}$. The problem is recast to look for
the least distinguishable channel from $\Phi $ among the convex set $\sum_i p_i
\Psi_i$,... | 1709.03805v1 |
2017-09-18 | Explicit Backbone Curves from Spectral Submanifolds of Forced-Damped Nonlinear Mechanical Systems | Spectral submanifolds (SSMs) have recently been shown to provide exact and
unique reduced-order models for nonlinear unforced mechanical vibrations. Here
we extend these results to periodically or quasiperiodically forced mechanical
systems, obtaining analytic expressions for forced responses and backbone
curves on mod... | 1709.05947v3 |
2017-09-25 | Orbital-Free Density-Functional Theory Simulations of Displacement Cascade in Aluminum | Here, we report orbital-free density-functional theory (OF DFT) molecular
dynamics simulations of the displacement cascade in aluminum. The electronic
effect is our main concern. The displacement threshold energies are calculated
using OF DFT and classical molecular dynamics (MD) and the comparison reveals
the role of ... | 1709.08288v1 |
2017-09-27 | Damped Casimir radiation and photon correlation measurements | An effective toy model for an ideal one-dimensional nonstationary cavity is
taken to be the starting point to derive a fitting markovian master equation
for the corresponding leaky cavity. In the regime where the generation of
photons via the dynamical Casimir effect is bounded, the master equation thus
constructed all... | 1709.09685v1 |
2017-10-06 | Markovian master equation for nonlinear systems | Within the f-deformed oscillator formalism, we derive a Markovian master
equation for the description of the damped dynamics of nonlinear systems that
interact with their environment. The applicability of this treatment to the
particular case of a Morse-like oscillator interacting with a thermal field is
illustrated, a... | 1710.02251v1 |
2017-10-07 | On the De Gregorio modification of the Constantin-Lax-Majda Model | We study a modification due to De Gregorio of the Constantin-Lax-Majda (CLM)
model $\omega_t = \omega H\omega$ on the unit circle. The De Gregorio equation
is $\omega_t+u \omega_x-u_x\omega =0, u_x = H\omega.$ In contrast with the CLM
model, numerical simulations suggest that the solutions of the De Gregorio
model with... | 1710.02737v1 |
2017-10-12 | A Locking-free DP-Q2-P1 MFEM for Incompressible Nonlinear Elasticity Problems | A mixed finite element method (MFEM), using dual-parametric piecewise
bi-quadratic and affine (DP-Q2-P1) finite element approximations for the
deformation and the pressure like Lagrange multiplier respectively, is
developed and analyzed for the numerical computation of incompressible
nonlinear elasticity problems with ... | 1710.04445v2 |
2017-10-23 | An infinite dimensional Duffing-like evolution equation with linear dissipation and an asymptotically small source term | We consider an abstract nonlinear second order evolution equation, inspired
by some models for damped oscillations of a beam subject to external loads or
magnetic fields, and shaken by a transversal force. When there is no external
force, the system has three stationary positions, two stable and one unstable,
and all s... | 1710.08159v1 |
2017-10-26 | The effects of retardation on the topological plasmonic chain: plasmonic edge states beyond the quasistatic limit | We study a one-dimensional plasmonic system with non-trivial topology: a
chain of metallic nanoparticles with alternating spacing, which is the
plasmonic analogue to the Su-Schreiffer-Heeger model. We extend previous
efforts by including long range hopping with retardation and radiative damping,
which leads to a non-He... | 1710.09782v1 |
2017-10-30 | Is a doubly quantized vortex dynamically unstable in uniform superfluids? | We revisit the fundamental problem of the splitting instability of a doubly
quantized vortex in uniform single-component superfluids at zero temperature.
We analyze the system-size dependence of the excitation frequency of a doubly
quantized vortex through large-scale simulations of the Bogoliubov--de Gennes
equation, ... | 1710.10810v2 |
2017-10-30 | Breathers as Metastable States for the Discrete NLS equation | We study metastable motions in weakly damped Hamiltonian systems. These are
believed to inhibit the transport of energy through Hamiltonian, or nearly
Hamiltonian, systems with many degrees of freedom. We investigate this question
in a very simple model in which the breather solutions that are thought to be
responsible... | 1710.10999v2 |
2017-11-01 | Optical two-photon nonlinear waves in two-dimensional materials | A theory of an optical two-photon breather in a graphene monolayer (or
graphene-like two-dimensional material) is constructed. The system of the
material equations for two-photon transitions and the wave equation for
transverse magnetic polarized modes of the surface plasmon polaritons are shown
to reduce to the nonlin... | 1711.00343v1 |
2017-11-02 | Polaron in the dilute critical Bose condensate | The properties of impurity immersed in the dilute $D$-dimensional Bose gas at
temperatures close to the second-order phase transition point are considered.
Particularly by means of the $1/N$-expansion we calculated the leading-order
polaron energy and the damping rate in the limit of vanishing boson-boson
interaction. ... | 1711.00712v2 |
2017-11-09 | Stationary Distributions of Second Order Stochastic Evolution Equations with Memory in Hilbert Spaces | In this paper, we consider stationarity of a class of second-order stochastic
evolution equations with memory, driven by Wiener processes or Levy jump
processes, in Hilbert spaces. The strategy is to formulate by reduction some
first-order systems in connection with the stochastic equations under
investigation. We deve... | 1711.03448v1 |
2017-11-12 | On the stabilization of a hyperbolic Stokes system under geometric control condition | In this paper, we study the stabilization problem for a hyperbolic type
Stokes system posed on a bounded domain. We show that when the damping effects
are restricted to a subdomain satisfying the geometrical control condition the
system decays exponentially. The result is a consequence of a new quasi-mode
estimate for ... | 1711.04301v2 |
2017-11-21 | Electrostatic stability of electron-positron plasmas in dipole geometry | The electrostatic stability of electron-positron plasmas is investigated in
the point-dipole and Z-pinch limits of dipole geometry. The kinetic dispersion
relation for sub-bounce-frequency instabilities is derived and solved. For the
zero-Debye-length case, the stability diagram is found to exhibit singular
behavior. H... | 1711.08021v1 |
2017-11-22 | Fluctuations through a Vibrating Bounce | We study the evolution of cosmological perturbations in a non-singular
bouncing cosmology with a bounce phase which has superimposed oscillations of
the scale factor. We identify length scales for which the final spectrum of
fluctuations obtains imprints of the non-trivial bounce dynamics. These
imprints in the spectru... | 1711.08370v1 |
2017-11-23 | Speeding up Thermalisation via Open Quantum System Variational Optimisation | Optimizing open quantum system evolution is an important step on the way to
achieving quantum computing and quantum thermodynamic tasks. In this article,
we approach optimisation via variational principles and derive an open quantum
system variational algorithm explicitly for Lindblad evolution in Liouville
space. As a... | 1711.08776v1 |
2017-11-28 | Pulsations in close binaries from the BRITE point of view | Using BRITE photometric data for several close binary systems we address the
problem of damping pulsations in close binary systems due to proximity effects.
Because of small number statistics, no firm conclusion is given, but we find
pulsations in three relatively close binaries. The pulsations in these binaries
have, ... | 1711.10344v1 |
2017-12-12 | Non-Gaussianity of multiple photon subtracted thermal states in terms of compound-Poisson photon number distribution parameters: theory and experiment | The multiphoton-subtracted thermal states are an interesting example of
quantum states of light which are both classical and non-Gaussian. All the
properties of such states can be described by just two parameters of
compound-Poisson photon number distribution. The non-Gaussianity dependency on
these parameters has been... | 1712.04174v2 |
2017-12-15 | Dynamically tunable metamaterial analogue of electromagnetically induced transparency with graphene in the terahertz regime | A novel mechanism to realize dynamically tunable electromagnetically induced
transparency (EIT) analogue in the terahertz (THz) regime is proposed. By
putting the electrically controllable monolayer graphene under the dark
resonator, the amplitude of the EIT resonance in the metal-based metamaterial
can be modulated su... | 1712.05525v1 |
2017-12-15 | Frequency decay for Navier-Stokes stationary solutions | We consider stationary Navier-Stokes equations in R 3 with a regular external
force and we prove exponential frequency decay of the solutions. Moreover, if
the external force is small enough, we give a pointwise exponential frequency
decay for such solutions according to the K41 theory. If a damping term is
added to th... | 1712.05753v1 |
2017-12-16 | Approximation of a damped Euler-Bernoulli beam model in the Loewner framework | The Loewner framework for model order reduction is applied to the class of
infinite-dimension systems. The transfer function of such systems is irrational
(as opposed to linear systems, whose transfer function is rational) and can be
expressed as an infinite series of rational functions. The main advantage of
the metho... | 1712.06031v1 |
2017-12-18 | Wave propagation through an elastically-asymmetric architected material | A one-dimensional wave propagation through elastically asymmetric media is
investigated. A class of metamaterials possessing an arbitrary elastic
asymmetry is proposed. This asymmetry results in different wave speeds of
tensile and compressive components of elastic waves. The faster component can
overtake the slower on... | 1712.06294v2 |
2017-12-19 | Polaron in dilute 2D Bose gas at low temperatures | The properties of a Bose polaron immersed in a dilute two-dimensional medium
at finite temperatures are discussed. Assuming that the impurity is
weakly-coupled to the bath particles we have perturbatively calculated the
polaron energy, effective mass, quasiparticle residue and damping rate. The
parameters of impurity s... | 1712.06978v1 |
2017-12-28 | On well-posedness of Ericksen-Leslie's parabolic-hyperbolic liquid crystal model in compressible flow | We study the Ericksen-Leslie's parabolic-hyperbolic liquid crystal model in
compressible flow. Inspired by our study for incompressible case
\cite{Jiang-Luo-arXiv-2017} and some techniques from compressible Navier-Stokes
equations, we prove the local-in-time existence of the classical solution to
the system with finite... | 1712.09799v1 |
2017-12-29 | A note on the nonlinear Schrödinger equation in a general domain | We consider the Cauchy problem for nonlinear Schr\"odinger equations in a
general domain $\Omega\subset\mathbb{R}^N$. Construction of solutions has been
only done by classical compactness method in previous results. Here, we
construct solutions by a simple alternative approach. More precisely, solutions
are constructed... | 1712.10239v2 |
2018-01-23 | On degenerate circular and shear flows: the point vortex and power law circular flows | We consider the problem of asymptotic stability and linear inviscid damping
for perturbations of a point vortex and similar degenerate circular flows.
Here, key challenges include the lack of strict monotonicity and the necessity
of working in weighted Sobolev spaces whose weights degenerate as the radius
tends to zero... | 1801.07371v1 |
2018-01-25 | Arbitrary-order functionally fitted energy-diminishing methods for gradient systems | It is well known that for gradient systems in Euclidean space or on a
Riemannian manifold, the energy decreases monotonically along solutions. In
this letter we derive and analyse functionally fitted energy-diminishing
methods to preserve this key property of gradient systems. It is proved that
the novel methods are un... | 1801.08484v1 |
2018-01-27 | Decay of Benjamin - Ono solitons under the influence of dissipation | The adiabatic decay of Benjamin - Ono algebraic solitons is studied when the
influence of various types of small dissipation and radiative losses due to
large scale Coriolis dispersion are taken into consideration. The physically
most important dissipations are studied, Rayleigh and Reynolds dissipation,
Landau damping... | 1801.09088v1 |
2018-01-28 | Decay of Kadomtsev - Petviashvili lumps in dissipative media | The decay of Kadomtsev - Petviashvili lumps is considered for a few typical
dissipations - Rayleigh dissipation, Reynolds dissipation, Landau damping,
Chezy bottom friction, viscous dissipation in the laminar boundary layer, and
radiative losses caused by large-scale dispersion. It is shown that the
straight-line motio... | 1801.09175v1 |
2018-03-03 | Long time instability of the Couette flow in low Gevrey spaces | We prove the instability of the Couette flow if the disturbances is less
smooth than the Gevrey space of class 2. This shows that this is the critical
regularity for this problem since it was proved in [5] that stability and
inviscid damping hold for disturbances which are smoother than the Gevrey space
of class 2. A b... | 1803.01246v1 |
2018-03-11 | Uniform and non-uniform thermal switching of magnetic particles | The pulse-noise approach to systems of classical spins weakly interacting
with the bath has been applied to study thermally-activated escape of magnetic
nanoparticles over the uniform and nonuniform energy barriers at intermediate
and low damping. The validity of approximating a single-domain particle by a
single spin ... | 1803.03988v1 |
2018-03-19 | Dynamics of a Magnetic Needle Magnetometer: Sensitivity to Landau-Lifshitz-Gilbert Damping | An analysis of a single-domain magnetic needle in the presence of an external
magnetic field ${\bf B}$ is carried out with the aim of achieving a high
precision magnetometer. We determine the uncertainty $\Delta B$ of such a
device due to Gilbert dissipation and the associated internal magnetic field
fluctuations that ... | 1803.10064v2 |
2018-03-31 | Point-source dispersion of quasi-neutrally-buoyant inertial particles | We analyze the evolution of the distribution, both in the phase space and in
the physical space, of inertial particles released by a spatially-localized
(punctual) source and advected by an incompressible flow. The difference in
mass density between fluid and particles is assumed as small, and represents
the basic para... | 1804.00186v1 |
2018-04-04 | Dynamics of measurement induced nonlocality under decoherence | Measurement Induced Nonlocality (MIN) captures nonlocal effects of a quantum
state due to local von Neumann projective measurements, is a bonafide measure
of quantum correlation between constituents of a composite system. In this
paper, we study the dynamical behavior of entanglement (measured by
concurrence), Hilber-S... | 1804.01248v1 |
2018-04-04 | Integer partition manifolds and phonon damping in one dimension | We develop a quantum model based on the correspondence between energy
distribution between harmonic oscillators and the partition of an integer
number. A proper choice of the interaction Hamiltonian acting within this
manifold of states allows us to examine both the quantum typicality and the
non-exponential relaxation... | 1804.01374v1 |
2018-04-16 | Searching for light from a dark matter clump | The DAMPE experiment has recently reported an electron spectrum that can be
explained by dark matter annihilation into charged lepton pairs in a nearby
dark matter clump. The accompanying bremsstrahlung may yield a gamma-ray excess
with a known spectral shape that extends over an angular scale of
$O(10^\circ)$. We show... | 1804.05792v2 |
2018-04-18 | Further results on the asymptotic behavior of a 2D overhead crane with input delays: Exponential convergence | This article is concerned with the asymptotic behavior of a 2D overhead
crane. Taking into account the presence of a delay in the boundary, and
assuming that no displacement term appears in the system, a distributed
(interior) damping feedback law is proposed in order to compensate the effect
of the delay. Then, invoki... | 1804.06765v1 |
2018-04-24 | An Invariant-region-preserving (IRP) Limiter to DG Methods for Compressible Euler Equations | We introduce an explicit invariant-region-preserving limiter applied to DG
methods for compressible Euler equations. The invariant region considered
consists of positivity of density and pressure and a maximum principle of a
specific entropy. The modified polynomial by the limiter preserves the cell
average, lies entir... | 1804.08814v1 |
2018-05-04 | Resonance overlap and non-linear velocity spread in Hamiltonian beam-plasma systems | We analyze some specific features of the beam-plasma instability. In
particular, non-perturbative effects in the dispersion relation are studied
when the standard perturbative inverse Landau damping treatment breaks down. We
also elucidate how only the global distortion of the profile rather than the
clump width is tru... | 1805.01821v2 |
2018-05-07 | Implementation of Stochastic Quasi-Newton's Method in PyTorch | In this paper, we implement the Stochastic Damped LBFGS (SdLBFGS) for
stochastic non-convex optimization. We make two important modifications to the
original SdLBFGS algorithm. First, by initializing the Hessian at each step
using an identity matrix, the algorithm converges better than original
algorithm. Second, by pe... | 1805.02338v1 |
2018-05-27 | Global Well-Posedness of a 3D MHD Model in Porous Media | In this paper we show the global well-posedness of solutions to a
three-dimensional magnetohydrodynamical (MHD) model in porous media. Compared
to the classical MHD equations, our system involves a nonlinear damping term in
the momentum equations due to the "Brinkman-Forcheimer-extended-Darcy" law of
flow in porous med... | 1805.10661v2 |
2018-06-13 | Canonical Models of Dielectric Response | The interaction of electromagnetic fields with a solid is characterized by
several interconnected response functions: the dielectric function
$\varepsilon(\omega)$, index of refraction $N(\omega)$, conductivity
$\sigma(\omega)$, and optical impedance $Z(\omega)$. Here we utilize three
canonical models of dielectric res... | 1806.05158v1 |
2018-06-20 | Mean Field Analysis of Personalized PageRank with Implications for Local Graph Clustering | We analyse a mean-field model of Personalized PageRank on the Erdos-Renyi
random graph containing a denser planted Erdos-Renyi subgraph. We investigate
the regimes where the values of Personalized PageRank concentrate around the
mean-field value. We also study the optimization of the damping factor, the
only parameter ... | 1806.07640v1 |
2018-06-24 | Existence of time-periodic strong solutions to a fluid-structure system | We study a nonlinear coupled fluid-structure system modelling the blood flow
through arteries. The fluid is described by the incompressible Navier-Stokes
equations in a 2D rectangular domain where the upper part depends on a
structure satisfying a damped Euler-Bernoulli beam equation. The system is
driven by time-perio... | 1806.09173v1 |
2018-09-04 | Thermal noise in complex systems | We present a method to calculate the power spectral density of Brownian noise
in complex optomechanical systems using Levin's approach of virtual pressure
and present first mechanical loss measurements for high-purity GaAs over a wide
temperature range from 7 K to 250 K. The loss reveals three Debye loss peaks.
Each pe... | 1809.10720v1 |
2018-11-06 | Chaotic Synchronization between Atomic Clocks | We predict synchronization of the chaotic dynamics of two atomic ensembles
coupled to a heavily damped optical cavity mode. The atoms are dissipated
collectively through this mode and pumped incoherently to achieve a macroscopic
population of the cavity photons. Even though the dynamics of each ensemble are
chaotic, th... | 1811.02148v2 |
2018-11-06 | Nonlinear Dynamics Semi-classical Model of Quantum Spin | A nonlinear dynamics semi-classical model is used to show that standard
quantum spin analysis can be obtained. The model includes a classically driven
nonlinear differential equation with dissipation and a semi-classical
interpretation of the torque on a spin magnetic moment in the presence of a
realistic magnetic fiel... | 1811.02645v1 |
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