publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2016-12-28 | Quantum coherence of two-qubit over quantum channels with memory | Using the axiomatic definition of the coherence measure, such as the $l_{1}$
norm and the relative entropy, we study the phenomena of two-qubit system
quantum coherence through quantum channels where successive uses of the
channels are memory. Different types of noisy channels with memory, such as
amplitude damping, ph... | 1612.08791v1 |
2017-01-04 | Hamiltonian of mean force and a damped harmonic oscillator in an anisotropic medium | The quantum dynamics of a damped harmonic oscillator is investigated in the
presence of an anisotropic heat bath. The medium is modeled by a continuum of
three dimensional harmonic oscillators and anisotropic coupling is treated by
introducing tensor coupling functions. Starting from a classical Lagrangian,
the total s... | 1701.00964v2 |
2017-01-30 | Quantization of energy and weakly turbulent profiles of the solutions to some damped second order evolution equations | We consider a second order equation with a linear "elastic" part and a
nonlinear damping term depending on a power of the norm of the velocity. We
investigate the asymptotic behavior of solutions, after rescaling them suitably
in order to take into account the decay rate and bound their energy away from
zero.We find a ... | 1701.08604v1 |
2017-02-15 | Topological Properties of a Coupled Spin-Photon System Induced by Damping | We experimentally examine the topological nature of a strongly coupled
spin-photon system induced by damping. The presence of both spin and photonic
losses results in a non-Hermitian system with a variety of exotic phenomena
dictated by the topological structure of the eigenvalue spectra and the
presence of an exceptio... | 1702.04797v2 |
2017-02-22 | Modified quantum-speed-limit bounds for open quantum dynamics in quantum channels | The minimal evolution time between two distinguishable states is of
fundamental interest in quantum physics. Very recently Mirkin et al. argue that
some most common quantum-speed-limit (QSL) bounds which depend on the actual
evolution time do not cleave to the essence of the QSL theory as they grow
indefinitely but the... | 1702.06748v3 |
2017-03-07 | Lower Bound and optimality for a nonlinearly damped Timoshenko system with thermoelasticity | In this paper, we consider a vibrating nonlinear Timoshenko system with
thermoelasticity with second sound. We first investigate the strong stability
of this system, then we devote our efforts to obtain the strong lower energy
estimates using Alabau--Boussouira's energy comparison principle introduced in
\cite{2} (see ... | 1703.02599v4 |
2017-03-08 | A Parameterized Energy Correction Method for Electromagnetic Showers in BGO-ECAL of DAMPE | DAMPE is a space-based mission designed as a high energy particle detector
measuring cosmic-rays and $\gamma-$rays which was successfully launched on
Dec.17, 2015. The BGO electromagnetic calorimeter is one of the key
sub-detectors of DAMPE for energy measurement of electromagnetic showers
produced by $e^{\pm}/{\gamma}... | 1703.02821v2 |
2017-03-08 | A GAMP Based Low Complexity Sparse Bayesian Learning Algorithm | In this paper, we present an algorithm for the sparse signal recovery problem
that incorporates damped Gaussian generalized approximate message passing
(GGAMP) into Expectation-Maximization (EM)-based sparse Bayesian learning
(SBL). In particular, GGAMP is used to implement the E-step in SBL in place of
matrix inversio... | 1703.03044v2 |
2017-04-07 | Underdamped stochastic harmonic oscillator | We investigate stationary states of the linear damped stochastic oscillator
driven by L\'evy noises. In the long time limit kinetic and potential energies
of the oscillator do not fulfill the equipartition theorem and their
distributions follow the power-law asymptotics. At the same time, partition of
the mechanical en... | 1704.02119v2 |
2017-04-13 | Quantum behaviour of open pumped and damped Bose-Hubbard trimers | We propose and analyse analogs of optical cavities for atoms using three-well
inline Bose-Hubbard models with pumping and losses. With one well pumped and
one damped, we find that both the mean-field dynamics and the quantum
statistics show a qualitative dependence on the choice of damped well. The
systems we analyse r... | 1704.04021v1 |
2017-05-27 | Power System Supplementary Damping Controllers in the Presence of Saturation | This paper presents the analysis and a method to design supplementary damping
controllers (SDCs) for synchronous generators considering the effects of
saturation limits. Usually such saturations of control signals are imposed in
order to enforce practical limitations such as component ratings. However, to
guarantee the... | 1705.09849v1 |
2017-05-26 | Absence of Landau damping in driven three-component Bose-Einstein condensate in optical lattices | We explore the quantum many-body physics of a three-component Bose-Einstein
condensate (BEC) in an optical lattices driven by laser fields in $V$ and
$\Lambda$ configurations. We obtain exact analytical expressions for the energy
spectrum and amplitudes of elementary excitations, and discover symmetries
among them. We ... | 1705.10199v2 |
2017-05-31 | Low-energy modes of spin-imbalanced Fermi gases in BCS phase | The low-energy modes of a spin-imbalanced superfluid Fermi gas in the
Bardeen-Cooper-Schrieffer (BCS) side are studied. The gas is assumed to be
sufficiently dilute so that the pairing of atoms can be considered effective
only in s-wave between fermions of different internal state. The order
parameter at equilibrium is... | 1705.11162v1 |
2017-06-01 | Global Stabilization of the Navier-Stokes-Voight and the damped nonlinear wave equations by finite number of feedback controllers | In this paper we introduce a finite-parameters feedback control algorithm for
stabilizing solutions of the Navier-Stokes-Voigt equations, the strongly damped
nonlinear wave equations and the nonlinear wave equation with nonlinear damping
term, the Benjamin-Bona-Mahony-Burgers equation and the KdV-Burgers equation.
This... | 1706.00162v1 |
2017-06-08 | Realistic clocks for a Universe without time | There are a number of problematic features within the current treatment of
time in physical theories, including the "timelessness" of the Universe as
encapsulated by the Wheeler-DeWitt equation. This paper considers one
particular investigation into resolving this issue; a conditional probability
interpretation that wa... | 1706.02531v1 |
2017-06-26 | High $β$ Effects on Cosmic Ray Streaming in Galaxy Clusters | Diffuse, extended radio emission in galaxy clusters, commonly referred to as
radio halos, indicate the presence of high energy cosmic ray (CR) electrons and
cluster-wide magnetic fields. We can predict from theory the expected surface
brightness of a radio halo, given magnetic field and CR density profiles.
Previous st... | 1706.08525v2 |
2017-07-02 | Metastability of Kolmogorov flows and inviscid damping of shear flows | First, we consider Kolmogorov flow (a shear flow with a sinusoidal velocity
profile) for 2D Navier-Stokes equation on a torus. Such flows, also called bar
states, have been numerically observed as one type of metastable states in the
study of 2D turbulence. For both rectangular and square tori, we prove that the
non-sh... | 1707.00278v1 |
2017-09-06 | Linear gyrokinetic investigation of the geodesic acoustic modes in realistic tokamak configurations | Geodesic acoustic modes (GAMs) are studied by means of the gyrokinetic global
particle-in-cell code ORB5. Linear electromagnetic simulations in the low
electron beta limit have been performed, in order to separate acoustic and
Alfv\'enic time scales and obtain more accurate measurements. The dependence of
the frequency... | 1709.01818v1 |
2017-09-17 | Further insights into the damping-induced self-recovery phenomenon | In a series of papers, D. E. Chang, et al., proved and experimentally
demonstrated a phenomenon they termed "damping-induced self-recovery". However,
these papers left a few questions concerning the observed phenomenon unanswered
- in particular, the effect of the intervening lubricant-fluid and its
viscosity on the re... | 1709.05596v5 |
2017-09-19 | An Improved Primal-Dual Interior Point Solver for Model Predictive Control | We propose a primal-dual interior-point (PDIP) method for solving quadratic
programming problems with linear inequality constraints that typically arise
form MPC applications. We show that the solver converges (locally)
quadratically to a suboptimal solution of the MPC problem. PDIP solvers rely on
two phases: the damp... | 1709.06362v1 |
2017-09-22 | Nonlinear stage of Benjamin-Feir instability in forced/damped deep water waves | We study a three-wave truncation of a recently proposed damped/forced
high-order nonlinear Schr\"odinger equation for deep-water gravity waves under
the effect of wind and viscosity. The evolution of the norm (wave-action) and
spectral mean of the full model are well captured by the reduced dynamics.
Three regimes are ... | 1709.07850v2 |
2017-09-27 | On long-time asymptotics for viscous hydrodynamic models of collective behavior with damping and nonlocal interactions | Hydrodynamic systems arising in swarming modelling include nonlocal forces in
the form of attractive-repulsive potentials as well as pressure terms modelling
strong local repulsion. We focus on the case where there is a balance between
nonlocal attraction and local pressure in presence of confinement in the whole
space... | 1709.09290v2 |
2017-09-28 | Landau Damping with Electron Lenses in Space-Charge Dominated Beams | Progress on the Intensity Frontier of high energy physics critically depends
on record high intensity charged particles accelerators. Beams in such machines
become operationally limited by coherent beam instabilities, particularly
enhanced in the regime of strong space charge (SC). Usual methods to control
the instabil... | 1709.10020v1 |
2017-10-13 | Hydrodynamic-to-ballistic crossover in Dirac fluid | We develop an exactly solvable classical kinetic model of transport in Dirac
materials accounting for strong electron-electron (e-e) and electron-hole (e-h)
collisions. We use this model to track the evolution of graphene conductivity
and properties of its collective excitations across the
hydrodynamic-to-ballistic cro... | 1710.05054v3 |
2017-10-13 | The second hyperpolarizability of systems described by the space-fractional Schrodinger equation | The static second hyperpolarizability is derived from the space-fractional
Schr\"{o}dinger equation in the particle-centric view. The Thomas-Reiche-Kuhn
sum rule matrix elements and the three-level ansatz determines the maximum
second hyperpolarizability for a space-fractional quantum system. The total
oscillator stren... | 1710.05099v2 |
2017-11-08 | Bulk viscous corrections to screening and damping in the deconfined phase at high temperature | Non-equilibrium corrections in a hot QCD medium modify the "hard thermal
loops" (HTL) which determine the resummed propagators for gluons with soft
momenta as well as the Debye screening and Landau damping mass scales. We focus
on bulk viscous corrections to a thermal fixed point. The screening and damping
mass scales ... | 1711.03072v1 |
2017-11-29 | A model explaining neutrino masses and the DAMPE cosmic ray electron excess | We propose a flavored $U(1)_{e\mu}$ neutrino mass and dark matter~(DM) model
to explain the recent DArk Matter Particle Explorer (DAMPE) data, which feature
an excess on the cosmic ray electron plus positron flux around 1.4 TeV. Only
the first two lepton generations of the Standard Model are charged under the
new $U(1)... | 1711.10995v2 |
2017-11-29 | Electrophilic dark matter with dark photon: from DAMPE to direct detection | The electron-positron excess reported by the DAMPE collaboration recently may
be explained by an electrophilic dark matter (DM). A standard model singlet
fermion may play the role of such a DM when it is stablized by some symmetries,
such as a dark $U(1)_X^{}$ gauge symmetry, and dominantly annihilates into the
electro... | 1711.11000v2 |
2017-11-30 | Leptophilic dark matter in gauged $U(1)_{L_e-L_μ}$ model in light of DAMPE cosmic ray $e^+ + e^-$ excess | Motivated by the very recent cosmic-ray electron+positron excess observed by
DAMPE collaboration, we investigate a Dirac fermion dark matter (DM) in the
gauged $L_e - L_\mu$ model. DM interacts with the electron and muon via the
$U(1)_{e-\mu}$ gauge boson $Z^{'}$. The model can explain the DAMPE data well.
Although a n... | 1711.11563v3 |
2017-12-03 | Explaining the DAMPE $e^+ e^-$ excess using the Higgs triplet model with a vector dark matter | We explain the $e^+ e^-$ excess observed by the DAMPE Collaboration using a
dark matter model based upon the Higgs triplet model and an additional hidden
$SU(2)_X$ gauge symmetry. Two of the $SU(2)_X$ gauge bosons are stable due to a
residual discrete symmetry and serve as the dark matter candidate. We search
the param... | 1712.00793v2 |
2017-12-06 | Explain DAMPE Results by Dark Matter With Hierarchical Lepton-Specific Yukawa Interactions | We propose to interpret the DAMPE electron excess at 1.5 TeV through scalar
or Dirac fermion dark matter (DM) annihilation with doubly charged scalar
mediators that have lepton-specific Yukawa couplings. Hierarchy of such
lepton-specific Yukawa couplings is generated through the Froggatt-Nielsen
mechanism, so that the ... | 1712.02381v3 |
2017-12-08 | Kinetic damping in the spectra of the spherical impedance probe | The impedance probe is a measurement device to measure plasma parameter like
electron density. It consists of one electrode connected to a network analyzer
via a coaxial cable and is immersed into a plasma. A bias potential superposed
with an alternating potential is applied to the electrode and the response of
the pla... | 1712.03126v1 |
2017-12-14 | DAMPE squib? Significance of the 1.4 TeV DAMPE excess | We present a Bayesian and frequentist analysis of the DAMPE charged cosmic
ray spectrum. The spectrum, by eye, contained a spectral break at about 1 TeV
and a monochromatic excess at about 1.4 TeV. The break was supported by a Bayes
factor of about $10^{10}$ and we argue that the statistical significance was
resounding... | 1712.05089v1 |
2017-12-15 | Radiative Seesaw Model and DAMPE Excess from Leptophilic Gauge Symmetry | In the light of the $e^{+}+e^{-}$ excess observed by DAMPE experiment, we
propose an anomaly-free radiative seesaw model with an alternative leptophilic
$U(1)_X$ gauge symmetry. In the model, only right-handed leptons are charged
under $U(1)_X$ symmetry. The tiny Dirac neutrino masses are generated at
one-loop level an... | 1712.05722v2 |
2017-12-19 | Damping of Josephson oscillations in strongly correlated one-dimensional atomic gases | We study Josephson oscillations of two strongly correlated one-dimensional
bosonic clouds separated by a localized barrier. Using a quantum-Langevin
approach and the exact Tonks-Girardeau solution in the impenetrable-boson
limit, we determine the dynamical evolution of the particle-number imbalance,
displaying an effec... | 1712.06949v2 |
2017-12-21 | The gluon condensation effects in the DAMPE cosmic ray spectrum of electrons and positrons | Gluons dominate the proton behavior at high energy collisions, they can be
condensed at ultra high energy. The collisions of the accelerated high energy
protons with interplanetary matter in cosmic rays will produce a huge number of
secondary particles at the gluon condensate energy region, which break the
primary powe... | 1712.07868v2 |
2017-12-22 | Low-momentum dynamic structure factor of a strongly interacting Fermi gas at finite temperature: The Goldstone phonon and its Landau damping | We develop a microscopic theory of dynamic structure factor to describe the
Bogoliubov-Anderson-Goldstone phonon mode and its damping rate in a strongly
interacting Fermi gas at finite temperature. It is based on a density
functional approach - the so-called superfluid local density approximation. The
accuracy of the t... | 1712.08318v1 |
2017-12-22 | A brief summary of nonlinear echoes and Landau damping | In this expository note we review some recent results on Landau damping in
the nonlinear Vlasov equations, focusing specifically on the recent
construction of nonlinear echo solutions by the author [arXiv:1605.06841] and
the associated background. These solutions show that a straightforward
extension of Mouhot and Vill... | 1712.08498v1 |
2017-12-28 | Coherence evolution in two-qubit system going through amplitude damping channel | In this paper, we analyze the evolution of quantum coherence in a two-qubit
system going through the amplitude damping channel. After they have gone
through this channel many times, we analyze the systems with respect to the
coherence of their output states. When only one subsystem goes through the
channel, frozen cohe... | 1712.09769v1 |
2018-01-09 | Balanced Truncation Model Reduction of a Nonlinear Cable-Mass PDE System with Interior Damping | We consider model order reduction of a nonlinear cable-mass system modeled by
a 1D wave equation with interior damping and dynamic boundary conditions. The
system is driven by a time dependent forcing input to a linear mass-spring
system at one boundary. The goal of the model reduction is to produce a low
order model t... | 1801.02792v1 |
2018-01-18 | Analytic solutions to various dissipation models of the simple and driven quantum harmonic oscillator | We obtain analytic solutions to various models of dissipation of the quantum
harmonic oscillator, employing a simple method in the Wigner function Fourier
transform description of the system; and study as an exemplification, the
driven open quantum harmonic oscillator. The environmental models we use are
based on optic... | 1801.05943v1 |
2018-02-12 | Chance-constrained optimal location of damping control actuators under wind power variability | This paper proposes a new probabilistic energy-based method to determine the
optimal installation location of electronically-interfaced resources (EIRs)
considering dynamic reinforcement under wind variability in systems with high
penetration of wind power. The oscillation energy and total action are used to
compare th... | 1802.04354v1 |
2018-02-21 | On the vibron-polaron damping in quasi 1D macromolecular chains | The properties of the intramolecular vibrational excitation (vibron) in a
quasi 1D macromolecular structure are studied. It is supposed that due to the
vibron interaction with optical phonon modes, a vibron might form partially
dressed small polaron states. The properties of these states are investigated
in dependence ... | 1802.07424v1 |
2018-02-27 | Impact of damping on superconducting gap oscillations induced by intense Terahertz pulses | We investigate the interplay between gap oscillations and damping in the
dynamics of superconductors taken out of equilibrium by strong optical pulses
with sub-gap Terahertz frequencies. A semi-phenomenological formalism is
developed to include the damping within the electronic subsystem that arises
from effects beyond... | 1802.09711v2 |
2018-02-28 | Analysis of imperfections in the coherent optical excitation of single atoms to Rydberg states | We study experimentally various physical limitations and technical
imperfections that lead to damping and finite contrast of optically-driven Rabi
oscillations between ground and Rydberg states of a single atom. Finite
contrast is due to preparation and detection errors and we show how to model
and measure them accurat... | 1802.10424v1 |
2018-03-07 | Connecting dissipation and noncommutativity: A Bateman system case study | Quantum effects on a pair of Bateman oscillators embedded in an ambient
noncommutative space (Moyal plane) is analyzed using both path integral and
canonical quantization schemes within the framework of Hilbert-Schmidt operator
formulation. We adopt a method which is distinct from the one which employs 't
Hooft's schem... | 1803.03334v1 |
2018-03-18 | A machine learning method to separate cosmic ray electrons from protons from 10 to 100 GeV using DAMPE data | DArk Matter Particle Explorer (DAMPE) is a general purpose high energy cosmic
ray and gamma ray observatory, aiming to detect high energy electrons and
gammas in the energy range 5 GeV to 10 TeV and hundreds of TeV for nuclei. This
paper provides a method using machine learning to identify electrons and
separate them f... | 1803.06628v2 |
2018-03-20 | Estimating Participation Factors and Mode Shapes for Electromechanical Oscillations in Ambient Conditions | In this paper, a new technique is applied to conduct mode identification
using ambient measurement data. The proposed hybrid measurement- and
model-based method can accurately estimate the system state matrix in ambient
conditions, the eigenvalues and eigenvectors of which readily provide all the
modal knowledge includ... | 1803.07264v1 |
2018-03-21 | Globally Stable Output Feedback Synchronization of Teleoperation with Time-Varying Delays | This paper presents a globally stable teleoperation control strategy for
systems with time-varying delays that eliminates the need for velocity
measurements through novel augmented Immersion and Invariance velocity
observers. The new observers simplify a recent constructive Immersion and
Invariance velocity observer to... | 1803.08159v1 |
2018-03-29 | Stochastic conformal multi-symplectic method for damped stochastic nonlinear Schrodinger equation | In this paper, we propose a stochastic conformal multi-symplectic method for
a class of damped stochastic Hamiltonian partial differential equations in
order to inherit the intrinsic properties, and apply the numerical method to
solve a kind of damped stochastic nonlinear Schrodinger equation with
multiplicative noise.... | 1803.10885v1 |
2018-04-01 | Bounded Connectivity-Preserving Coordination of Networked Euler-Lagrange Systems | This paper derives sufficient conditions for bounded distributed
connectivity-preserving coordination of Euler-Lagrange systems with only
position measurements and with system uncertainties, respectively. The paper
proposes two strategies that suitably scale conventional gradient-based
controls to account for the actua... | 1804.00333v1 |
2018-04-17 | Modelling linewidths of Kepler red giants in NGC 6819 | We present a comparison between theoretical, frequency-dependent, damping
rates and linewidths of radial-mode oscillations in red-giant stars located in
the open cluster NGC 6819. The calculations adopt a time-dependent non-local
convection model, with the turbulent pressure profile being calibrated to
results of 3D hy... | 1804.06255v1 |
2018-04-24 | $\text{Co}_{25}\text{Fe}_{75}$ Thin Films with Ultralow Total Damping | We measure the dynamic properties of $\text{Co}_{25}\text{Fe}_{75}$ thin
films grown by dc magnetron sputtering. Using ferromagnetic resonance
spectroscopy, we demonstrate an ultralow total damping parameter in the
out-of-plane configuration of < 0.0013, whereas for the in-plane configuration
we find a minimum total da... | 1804.08786v1 |
2018-04-03 | Generalisation of Gilbert damping and magnetic inertia parameter as a series of higher-order relativistic terms | The phenomenological Landau-Lifshitz-Gilbert (LLG) equation of motion remains
as the cornerstone of contemporary magnetisation dynamics studies, wherein the
Gilbert damping parameter has been attributed to first-order relativistic
effects. To include magnetic inertial effects the LLG equation has previously
been extend... | 1804.09242v1 |
2018-05-15 | Simple Nonlinear Models with Rigorous Extreme Events and Heavy Tails | Extreme events and the heavy tail distributions driven by them are ubiquitous
in various scientific, engineering and financial research. They are typically
associated with stochastic instability caused by hidden unresolved processes.
Previous studies have shown that such instability can be modeled by a
stochastic dampi... | 1805.05615v3 |
2018-05-29 | Gilbert damping in non-collinear magnetic system | The modification of the magnetization dissipation or Gilbert damping caused
by an inhomogeneous magnetic structure and expressed in terms of a wave vector
dependent tensor $\underline{\alpha}(\vec{q})$ is investigated by means of
linear response theory. A corresponding expression for
$\underline{\alpha}(\vec{q})$ in te... | 1805.11468v1 |
2018-06-18 | Theoretical interpretations of DAMPE first results: a critical review | The DAMPE experiment recently published its first results on the lepton ($e^+
+ e^-$) cosmic-ray (CRs) flux. These results are of importance since they
account for the first direct detection of the lepton break around the energy of
1 TeV and confirm the discoveries of ground-based Cherenkov detectors.
Meanwhile they re... | 1806.06534v1 |
2018-06-22 | Optimal Design of Virtual Inertia and Damping Coefficients for Virtual Synchronous Machines | Increased penetration of inverter-connected renewable energy sources (RES) in
the power system has resulted in a decrease in available rotational inertia
which serves as an immediate response to frequency deviation due to
disturbances. The concept of virtual inertia has been proposed to combat this
decrease by enabling... | 1806.08488v1 |
2018-07-17 | Bipartite and Tripartite Entanglement for Three Damped Driven Qubits | We investigate bipartite and tripartite entanglement in an open quantum
system, specifically three qubits, all of which are damped, and one of which is
driven. We adapt a systematic approach in calculating the entanglement of
various bipartite splits usinga generalized concurrence as an indicator of
entanglement. Our c... | 1807.06178v1 |
2018-07-17 | Boundary-to-Displacement Asymptotic Gains for Wave Systems With Kelvin-Voigt Damping | We provide estimates for the asymptotic gains of the displacement of a
vibrating string with endpoint forcing, modeled by the wave equation with
Kelvin-Voigt and viscous damping and a boundary disturbance. Two asymptotic
gains are studied: the gain in the L2 spatial norm and the gain in the spatial
sup norm. It is show... | 1807.06549v1 |
2018-07-24 | Stabilization of an unstable wave equation using an infinite dimensional dynamic controller | This paper deals with the stabilization of an anti-stable string equation
with Dirichlet actuation where the instability appears because of the
uncontrolled boundary condition. Then, infinitely many unstable poles are
generated and an infinite dimensional control law is therefore proposed to
exponentially stabilize the... | 1807.08999v2 |
2018-07-24 | Interplay between intermittency and dissipation in collisionless plasma turbulence | We study the damping of collisionless Alfv\'enic turbulence by two
mechanisms: stochastic heating (whose efficiency depends on the local
turbulence amplitude $\delta z_\lambda$) and linear Landau damping (whose
efficiency is independent of $\delta z_\lambda$), describing in detail how they
affect and are affected by in... | 1807.09301v2 |
2018-07-31 | Input-to-State Stability of a Clamped-Free Damped String in the Presence of Distributed and Boundary Disturbances | This note establishes the Exponential Input-to-State Stability (EISS)
property for a clamped-free damped string with respect to distributed and
boundary disturbances. While efficient methods for establishing ISS properties
for distributed parameter systems with respect to distributed disturbances have
been developed du... | 1807.11696v2 |
2018-07-31 | Spin absorption at ferromagnetic-metal/platinum-oxide interface | We investigate the absorption of a spin current at a
ferromagnetic-metal/Pt-oxide interface by measuring current-induced
ferromagnetic resonance. The spin absorption was characterized by the magnetic
damping of the heterostructure. We show that the magnetic damping of a
Ni$_{81}$Fe$_{19}$ film is clearly enhanced by at... | 1807.11806v1 |
2018-08-16 | Stability analysis of dissipative systems subject to nonlinear damping via Lyapunov techniques | In this article, we provide a general strategy based on Lyapunov functionals
to analyse global asymptotic stability of linear infinite-dimensional systems
subject to nonlinear dampings under the assumption that the origin of the
system is globally asymp-totically stable with a linear damping. To do so, we
first charact... | 1808.05370v1 |
2018-08-30 | The influence of the coefficients of a system of coupled wave equations with fractional damping on its stabilization | In this work, we consider a system of two wave equations coupled by
velocities in one-dimensional space, with one boundary fractional damping.
First, we show that the system is strongly asymptotically stable if and only if
the coupling parameter b of the two equations is outside a discrete set of
exceptional real value... | 1808.10285v4 |
2018-09-05 | On the forced Euler and Navier-Stokes equations: Linear damping and modified scattering | We study the asymptotic behavior of the forced linear Euler and nonlinear
Navier-Stokes equations close to Couette flow in a periodic channel. As our
main result we show that for smooth time-periodic forcing linear inviscid
damping persists, i.e. the velocity field (weakly) asymptotically converges.
However, stability ... | 1809.01729v1 |
2018-09-12 | Theory of bifurcation amplifiers utilizing the nonlinear dynamical response of an optically damped mechanical oscillator | We consider a standard optomechanical system where a mechanical oscillator is
coupled to a cavity mode through the radiation pressure interaction. The
oscillator is coherently driven at its resonance frequency, whereas the cavity
mode is driven below its resonance, providing optical damping of the mechanical
oscillatio... | 1809.04592v2 |
2018-09-13 | Second order asymptotical regularization methods for inverse problems in partial differential equations | We develop Second Order Asymptotical Regularization (SOAR) methods for
solving inverse source problems in elliptic partial differential equations with
both Dirichlet and Neumann boundary data. We show the convergence results of
SOAR with the fixed damping parameter, as well as with a dynamic damping
parameter, which is... | 1809.04971v2 |
2018-09-24 | Oscillation Damping Control of Pendulum-like Manipulation Platform using Moving Masses | This paper presents an approach to damp out the oscillatory motion of the
pendulum-like hanging platform on which a robotic manipulator is mounted. To
this end, moving masses were installed on top of the platform. In this paper,
asymptotic stability of the platform (which implies oscillation damping) is
achieved by des... | 1809.08819v1 |
2018-09-25 | Theory of damping in magnetization dynamics, dispelling a myth and pointing a way forward | There is a widely-held belief amongst theoreticians that the Gilbert damping
parameter {\alpha} in magnetization dynamics is infinite for a pure metal at
T=0. The basic error leading to this belief is pointed out explicitly and the
various methods of calculation used are viewed in a unified way based on the
Lorentzian ... | 1809.09429v1 |
2018-07-16 | A unified N-SECE strategy for highly coupled piezoelectric energy scavengers | This paper proposes a novel vibration energy harvesting strategy based on an
extension of the Synchronous Electric Charge Extraction (SECE) approach,
enabling both the maximization of the harvested power and a consequent
bandwidth enlargement in the case of highly coupled/lightly damped
piezoelectric energy harvesters.... | 1809.09685v1 |
2018-10-15 | Localized spin waves in isolated $kπ$ skyrmions | The localized magnon modes of isolated $k\pi$ skyrmions on a field-polarized
background are analyzed based on the Landau-Lifshitz-Gilbert equation within
the terms of an atomistic classical spin model, with system parameters based on
the Pd/Fe biatomic layer on Ir(111). For increasing skyrmion order $k$ a higher
number... | 1810.06471v1 |
2018-10-24 | Nearly isotropic spin-pumping related Gilbert damping in Pt/Ni$_{81}$Fe$_{19}$/Pt | A recent theory by Chen and Zhang [Phys. Rev. Lett. 114, 126602 (2015)]
predicts strongly anisotropic damping due to interfacial spin-orbit coupling in
ultrathin magnetic films. Interfacial Gilbert-type relaxation, due to the spin
pumping effect, is predicted to be significantly larger for magnetization
oriented parall... | 1810.10595v4 |
2018-10-24 | Justification of the Lugiato-Lefever model from a damped driven $φ^4$ equation | The Lugiato-Lefever equation is a damped and driven version of the well-known
nonlinear Schr\"odinger equation. It is a mathematical model describing complex
phenomena in dissipative and nonlinear optical cavities. Within the last two
decades, the equation has gained a wide attention as it becomes the basic model
descr... | 1810.10630v1 |
2018-10-31 | Anisotropic and controllable Gilbert-Bloch dissipation in spin valves | Spin valves form a key building block in a wide range of spintronic concepts
and devices from magnetoresistive read heads to spin-transfer-torque
oscillators. We elucidate the dependence of the magnetic damping in the free
layer on the angle its equilibrium magnetization makes with that in the fixed
layer. The spin pum... | 1811.00020v2 |
2018-11-06 | Decay properties and asymptotic profiles for elastic waves with Kelvin-Voigt damping in 2D | In this paper we consider elastic waves with Kelvin-Voigt damping in 2D. For
the linear problem, applying pointwise estimates of the partial Fourier
transform of solutions in the Fourier space and asymptotic expansions of
eigenvalues and their eigenprojections, we obtain sharp energy decay estimates
with additional $L^... | 1811.02223v3 |
2018-12-06 | Damping and Anti-Damping Phenomena in Metallic Antiferromagnets: An ab-initio Study | We report on a first principles study of anti-ferromagnetic resonance (AFMR)
phenomena in metallic systems [MnX (X=Ir,Pt,Pd,Rh) and FeRh] under an external
electric field. We demonstrate that the AFMR linewidth can be separated into a
relativistic component originating from the angular momentum transfer between
the col... | 1812.02844v2 |
2018-12-12 | Extreme wave events for a nonlinear Schrödinger equation with linear damping and Gaussian driving | We perform a numerical study of the initial-boundary value problem, with
vanishing boundary conditions, of a driven nonlinear Schr\"odinger equation
(NLS) with linear damping and a Gaussian driver. We identify Peregrine-like
rogue waveforms, excited by two different types of vanishing initial data
decaying at an algebr... | 1812.05439v3 |
2018-12-13 | Stability of elastic transmission systems with a local Kelvin-Voigt damping | In this paper, we consider the longitudinal and transversal vibrations of the
transmission Euler-Bernoulli beam with Kelvin-Voigt damping distributed locally
on any subinterval of the region occupied by the beam and only in one side of
the transmission point. We prove that the semigroup associated with the
equation for... | 1812.05923v1 |
2018-12-13 | Energy decay estimates of elastic transmission wave/beam systems with a local Kelvin-Voigt damping | We consider a beam and a wave equations coupled on an elastic beam through
transmission conditions. The damping which is locally distributed acts through
one of the two equations only; its effect is transmitted to the other equation
through the coupling. First we consider the case where the dissipation acts
through the... | 1812.05924v1 |
2018-12-20 | Sound attenuation in stable glasses | Understanding the difference between universal low-temperature properties of
amorphous and crystalline solids requires an explanation of the stronger
damping of long-wavelength phonons in amorphous solids. A longstanding sound
attenuation scenario, resulting from a combination of experiments, theories,
and simulations,... | 1812.08736v2 |
2018-12-27 | Nonexistence of global solutions for a weakly coupled system of semilinear damped wave equations of derivative type in the scattering case | In this paper we consider the blow-up for solutions to a weakly coupled
system of semilinear damped wave equations of derivative type in the scattering
case. After introducing suitable functionals proposed by Lai-Takamura for the
corresponding single semilinear equation, we employ Kato's lemma to derive the
blow-up res... | 1812.10653v1 |
2019-01-05 | Simulations of wobble damping in viscoelastic rotators | Using a damped mass-spring model, we simulate wobble of spinning homogeneous
viscoelastic ellipsoids undergoing non-principal axis rotation. Energy damping
rates are measured for oblate and prolate bodies with different spin rates,
spin states, viscoelastic relaxation timescales, axis ratios, and strengths.
Analytical ... | 1901.01439v3 |
2019-01-16 | Laboratory investigations of the bending rheology of floating saline ice, and physical mechanisms of wave damping, in the HSVA ice tank | An experiment on the propagation of flexural-gravity waves was performed in
the HSVA ice tank. Physical characteristics of the water-ice system were
measured in different locations in the tank during the tests, with a number of
sensors deployed in the water, on the ice and in the air. Water velocity was
measured with a... | 1901.05333v1 |
2019-01-24 | Generalized framework for testing gravity with gravitational-wave propagation. III. Future prospect | The properties of gravitational-wave (GW) propagation are modified in
alternative theories of gravity and are crucial observables to test gravity at
cosmological distance. The propagation speed has already been measured from
GW170817 so precisely and pinned down to the speed of light, while other
properties of GW propa... | 1901.08249v2 |
2019-01-31 | Perturbed Markov Chains and Information Networks | The paper is devoted to studies of perturbed Markov chains commonly used for
description of information networks. In such models, the matrix of transition
probabilities for the corresponding Markov chain is usually regularised by
adding a special damping matrix multiplied by a small damping (perturbation)
parameter $\v... | 1901.11483v3 |
2019-02-12 | Ultra-low damping in lift-off structured yttrium iron garnet thin films | We show that using maskless photolithography and the lift-off technique,
patterned yttrium iron garnet thin films possessing ultra-low Gilbert damping
can be accomplished. The films of 70 nm thickness were grown on (001)-oriented
gadolinium gallium garnet by means of pulsed laser deposition, and they exhibit
high cryst... | 1902.04605v1 |
2019-02-14 | Dynamic Interconnection and Damping Injection for Input-to-State Stable Bilateral Teleoperation | In bilateral teleoperation, the human who operates the master and the
environment which interacts with the slave are part of the force feedback loop.
Yet, both have time-varying and unpredictable dynamics and are challenging to
model. A conventional strategy for sidestepping the demand for their models in
the stability... | 1902.05500v1 |
2019-02-15 | Evidence for Electron Landau Damping in Space Plasma Turbulence | How turbulent energy is dissipated in weakly collisional space and
astrophysical plasmas is a major open question. Here, we present the
application of a field-particle correlation technique to directly measure the
transfer of energy between the turbulent electromagnetic field and electrons in
the Earth's magnetosheath,... | 1902.05785v1 |
2019-02-20 | CoFeB/MgO/CoFeB structures with orthogonal easy axes: perpendicular anisotropy and damping | We report on the Gilbert damping parameter $\alpha$, the effective
magnetization $4\pi M_{eff}$, and the asymmetry of the $g$-factor in
bottom-CoFeB(0.93~nm)/MgO(0.90--1.25~nm)/CoFeB(1.31~nm)-top as-deposited
systems.
Magnetization of CoFeB layers exhibits a specific noncollinear configuration
with orthogonal easy ax... | 1902.07563v1 |
2019-02-22 | Thermal induced monochromatic microwave generation in magnon-polariton | We propose thermal induced generation of monochromatic microwave radiation in
magnon-polariton. Mechanism of thermal to microwave energy transformation is
based on intrinsic energy loss compensation of coupled magnon and microwave
cavity oscillators by thermal induced "negative damping". A singularity at an
exceptional... | 1902.08383v1 |
2019-03-04 | Nonlinear inviscid damping for zero mean perturbation of the 2D Euler Couette flow | In this note we revisit the proof of Bedrossian and Masmoudi
[arXiv:1306.5028] about the inviscid damping of planar shear flows in the 2D
Euler equations under the assumption of zero mean perturbation. We prove that a
small perturbation to the 2D Euler Couette flow in $\mathbb{T}\times
\mathbb{R}$ strongly converge to ... | 1903.01543v1 |
2019-03-10 | Orbital stabilization of nonlinear systems via Mexican sombrero energy shaping and pumping-and-damping injection | In this paper we show that a slight modification to the widely popular
interconnection and damping assignment passivity-based control
method---originally proposed for stabilization of equilibria of nonlinear
systems---allows us to provide a solution to the more challenging orbital
stabilization problem. Two different, ... | 1903.04070v3 |
2019-03-11 | Impact of thermal effects on the evolution of eccentricity and inclination of low-mass planets | Using linear perturbation theory, we evaluate the time-dependent force
exerted on an eccentric and inclined low-mass planet embedded in a gaseous
protoplanetary disc with finite thermal diffusivity $\chi$. We assume the
eccentricity and inclination to be small compared to the size of the thermal
lobes $\lambda\sim(\chi... | 1903.04470v2 |
2019-03-14 | The Strichartz estimates for the damped wave equation and the behavior of solutions for the energy critical nonlinear equation | For the linear damped wave equation (DW), the $L^p$-$L^q$ type estimates have
been well studied. Recently, Watanabe showed the Strichartz estimates for DW
when $d=2,3$. In the present paper, we give Strichartz estimates for DW in
higher dimensions. Moreover, by applying the estimates, we give the local
well-posedness o... | 1903.05887v1 |
2019-04-17 | Decays for Kelvin-Voigt damped wave equations I : the black box perturbative method | We show in this article how perturbative approaches~from our work with Hitrik
(see also the work by Anantharaman-Macia) and the {\em black box} strategy
from~ our work with Zworski allow to obtain decay rates for Kelvin-Voigt damped
wave equations from quite standard resolvent estimates : Carleman estimates or
geometri... | 1904.08318v2 |
2019-04-17 | Non-Hermitian skin effect and chiral damping in open quantum systems | One of the unique features of non-Hermitian Hamiltonians is the non-Hermitian
skin effect, namely that the eigenstates are exponentially localized at the
boundary of the system. For open quantum systems, a short-time evolution can
often be well described by the effective non-Hermitian Hamiltonians, while
long-time dyna... | 1904.08432v2 |
2019-04-19 | Plasmon-Emitter Interactions at the Nanoscale | Plasmon-emitter interactions are of paramount importance in modern
nanoplasmonics and are generally maximal at short emitter-surface separations.
However, when the separation falls below 10-20 nm, the classical theory
progressively deteriorates due to its neglect of quantum mechanical effects
such as nonlocality, elect... | 1904.09279v1 |
2019-05-08 | Discrete Energy behavior of a damped Timoshenko system | In this article, we consider a one-dimensional Timoshenko system subject to
different types of dissipation (linear and nonlinear dampings). Based on a
combination between the finite element and the finite difference methods, we
design a discretization scheme for the different Timoshenko systems under
consideration. We ... | 1905.03050v1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.