publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2010-11-11 | Damping of longitudinal magneto-acoustic oscillations in slowly varying coronal plasma | We investigate the propagation of MHD waves in a homogenous, magnetized
plasma in a weakly stratified atmosphere, representing hot coronal loops. In
most of earlier studies a time-independent equilibrium is considered. Here we
abandon this restriction and allow the equilibrium to develop as function of
time. In particu... | 1011.2617v1 |
2010-12-17 | Optimal switching of a nanomagnet assisted by microwaves | We develop an efficient and general method for optimizing the microwave field
that achieves magnetization switching with a smaller static field. This method
is based on optimal control and renders an exact solution for the 3D microwave
field that triggers the switching of a nanomagnet with a given anisotropy and
in an ... | 1012.3901v1 |
2010-12-22 | PageRank for ranking authors in co-citation networks | Google's PageRank has created a new synergy to information retrieval for a
better ranking of Web pages. It ranks documents depending on the topology of
the graphs and the weights of the nodes. PageRank has significantly advanced
the field of information retrieval and keeps Google ahead of competitors in the
search engi... | 1012.4872v1 |
2011-01-20 | Magnetohydrodynamic waves in solar partially ionized plasmas: two-fluid approach | We derive the dynamics of magnetohydrodynamic waves in two-fluid partially
ionized plasmas and to compare the results with those obtained under
single-fluid description. Two-fluid magnetohydrodynamic equations are used,
where ion-electron plasma and neutral particles are considered as separate
fluids. Dispersion relati... | 1101.3913v1 |
2011-08-25 | Characterizing Multi-planet Systems with Classical Secular Theory | Classical secular theory can be a powerful tool to describe the qualitative
character of multi-planet systems and offer insight into their histories. The
eigenmodes of the secular behavior, rather than current orbital elements, can
help identify tidal effects, early planet-planet scattering, and dynamical
coupling amon... | 1108.5149v2 |
2011-09-12 | Nonlinear spectroscopy of superconducting anharmonic resonators | We formulate a model for the steady state response of a nonlinear quantum
oscillator structure, such as those used in a variety of superconducting qubit
experiments, when excited by a steady, but not necessarily small, ac tone. We
show that this model can be derived directly from a circuit description of some
recent qu... | 1109.2490v1 |
2012-04-09 | The Kato Smoothing Effect for Regularized Schrödinger Equations in Exterior Domains | We prove, under the exterior geometric control condition, the Kato smoothing
effect for solutions of an inhomogenous and damped Schr\"odinger equation on
exterior domains. | 1204.1904v1 |
2012-04-26 | Well-posedness and long time behavior in nonlinear dissipative hyperbolic-like evolutions with critical exponents | These lectures present the analysis of stability and control of long time
behavior of PDE models described by nonlinear evolutions of hyperbolic type.
Specific examples of the models under consideration include: (i) nonlinear
systems of dynamic elasticity: von Karman systems, Berger's equations,
Kirchhoff - Boussinesq ... | 1204.5864v1 |
2012-06-15 | Comment on "Anisotropic Critical Magnetic Fluctuations in the Ferromagnetic Superconductor UCoGe" | We have presented the potential explanation of nonvanishing at q=0 Landau
damping measured experimentally in ferromagnetic compounds UGe2 and UCoGe based
on possible intersection of the Fermi sheets corresponding different bands. | 1206.3468v1 |
2012-06-21 | Interaction between an Isotropic Nanoparticle and Drifting Electrons in a Quantum Well | A hybrid system composed of an isotropic nanoparticle and a semiconductor
heterostructure with a quantum well has been considered. The nanoparticle is
supposed to be polarizable in an external electric field. A theoretical model
of the hybrid system is substantiated and formulated. Exact solutions of the
model equation... | 1206.4782v1 |
2012-10-02 | Coherence and Stimulated Emission in the Tavis-Cummings Model: A Quantum Description of the Free Induction Signal and Radiation Damping in Magnetic Resonance | We numerically solve the Liouville equation for the Tavis Cummings model of
multiple spins coupled to a lossless single mode cavity, starting from an
initial condition with small numbers of fully polarized spins tipped by a
specified angle, and the cavity in its ground Fock state. Time evolution of the
magnetizations a... | 1210.0868v2 |
2012-10-11 | Experimental estimations of viscoelastic properties of multilayer damped plates in broad-band frequency range | Regarding lightweighting structures for aeronautics, automotive or
construction applications, the level of performance of solutions proposed in
terms of damping and isolation is fundamental. Hence multilayered plate appears
as an interesting answer if damping performances are properly optimized. In
this paper, a novel ... | 1210.3333v3 |
2012-11-02 | Damping of mechanical vibrations by free electrons in metallic nanoresonators | We investigate the effect of free electrons on the quality factor (Q) of a
metallic nanomechanical resonator in the form of a thin elastic beam. The
flexural and longitudinal modes of the beam are modeled using thin beam
elasticity theory, and simple perturbation theory is used to calculate the rate
at which an externa... | 1211.0450v1 |
2013-01-14 | Two-qubit mixed states more entangled than pure states: Comparison of the relative entropy of entanglement for a given nonlocality | Amplitude damping changes entangled pure states into usually less-entangled
mixed states. We show, however, that even local amplitude damping of one or two
qubits can result in mixed states more entangled than pure states if one
compares the relative entropy of entanglement (REE) for a given degree of the
Bell-Clauser-... | 1301.2969v2 |
2013-07-02 | The ESO UVES Advanced Data Products Quasar Sample - I. Dataset and New N_HI Measurements of Damped Absorbers | We present here a dataset of quasars observed with the Ultraviolet Visual
Echelle Spectrograph (UVES) on the VLT and available in the ESO UVES Advanced
Data Products archive. The sample is made up of a total of 250 high resolution
quasar spectra with emission redshifts ranging from 0.191 < z_em <6.311. The
total UVES e... | 1307.0678v2 |
2013-08-23 | Stabilization of second-order evolution equations with time delay | We consider second-order evolution equations in an abstract setting with
damping and time delay and give sufficient conditions ensuring exponential
stability. Our abstract framework is then applied to the wave equation, the
elasticity system and the Petrovsky system. | 1308.5106v1 |
2013-09-21 | Bottomonium suppression at $\sqrt{s_{NN}}=2.76$ TeV using model based on color screening and gluonic dissociation with collisional damping | We present a model to explain the bottomonium suppression in Pb+Pb collisions
at mid rapidity obtained from Large Hadron Collider (LHC) energy,
$\sqrt{s_{NN}}=2.76$ TeV. The model consists of two decoupled mechanisms
namely, color screening during bottomonium production followed by gluon induced
dissociation along with... | 1309.5467v2 |
2013-10-20 | Nonequilibrium stationary state for a damped rotator | Perturbative construction of the nonequilibrium steady state of a rotator
under a stochastic forcing while subject to torque and friction | 1310.5379v1 |
2013-11-07 | Spin-Orbit Torques and Anisotropic Magnetization Damping in Skyrmion Crystals | The length scale of the magnetization gradients in chiral magnets is
determined by the relativistic Dzyaloshinskii-Moriya interaction. Thus, even
conventional spin-transfer torques are controlled by the relativistic
spin-orbit coupling in these systems, and additional relativistic corrections
to the current-induced tor... | 1311.1778v1 |
2013-11-13 | Recent progress in attractors for quintic wave equations | We report on new results concerning the global well-posedness, dissipativity
and attractors of the damped quintic wave equations in bounded domains of R^3. | 1311.3290v1 |
2014-01-19 | Analytical Solution of Mathieu Equation | The general solution of the homogeneous damped Mathieu equation in the
analytical form, allowing its practical using in many applications, including
superconductivity studies, without numerical calculations has been found. | 1401.5348v1 |
2014-06-10 | Wigner's Space-time Symmetries based on the Two-by-two Matrices of the Damped Harmonic Oscillators and the Poincaré Sphere | The second-order differential equation for a damped harmonic oscillator can
be converted to two coupled first-order equations, with two two-by-two matrices
leading to the group $Sp(2)$. It is shown that this oscillator system contains
the essential features of Wigner's little groups dictating the internal
space-time sy... | 1406.2403v1 |
2014-06-11 | Quantum critical metals in $4-ε$ dimensions | We study the quantum theory of a Fermi surface coupled to a gapless boson
scalar in $D=4-\epsilon$ spacetime dimensions as a simple model for non-Fermi
liquids (NFL) near a quantum phase transition. Our analysis takes into account
the full backreaction from Landau damping of the boson, and obtains an RG flow
that proce... | 1406.3029v2 |
2014-10-15 | A comparison of weak-turbulence and PIC simulations of weak electron-beam plasma interaction | Quasilinear theory has long been used to treat the problem of a weak electron
beam interacting with plasma and generating Langmuir waves. Its extension to
weak-turbulence theory treats resonant interactions of these Langmuir waves
with other plasma wave modes, in particular ion-sound waves. These are strongly
damped in... | 1410.4046v2 |
2015-05-07 | Theory for Bose-Einstein condensation of light in nano-fabricated semiconductor microcavities | We construct a theory for Bose-Einstein condensation of light in
nano-fabricated semiconductor microcavities. We model the semiconductor by one
conduction and one valence band which consist of electrons and holes that
interact via a Coulomb interaction. Moreover, we incorporate screening effects
by using a contact inte... | 1505.01732v2 |
2015-08-21 | Which verification qubits perform best for secure communication in noisy channel? | In secure quantum communication protocols, a set of single qubits prepared
using 2 or more mutually unbiased bases or a set of $n$-qubit ($n\geq2$)
entangled states of a particular form are usually used to form a verification
string which is subsequently used to detect traces of eavesdropping. The qubits
that form a ve... | 1508.05237v1 |
2015-08-30 | Spin-transfer torque based damping control of parametrically excited spin waves in a magnetic insulator | The damping of spin waves parametrically excited in the magnetic insulator
Yttrium Iron Garnet (YIG) is controlled by a dc current passed through an
adjacent normal-metal film. The experiment is performed on a macroscopically
sized YIG(100nm)/Pt(10nm) bilayer of 4x2 mm^2 lateral dimensions. The spin-wave
relaxation fre... | 1508.07517v1 |
2015-09-08 | Model comparison for the density structure across solar coronal waveguides | The spatial variation of physical quantities, such as the mass density,
across solar atmospheric waveguides governs the timescales and spatial scales
for wave damping and energy dissipation. The direct measurement of the spatial
distribution of density, however, is difficult and indirect seismology
inversion methods ha... | 1509.02340v1 |
2015-09-15 | Resonance vibration of impact oscillator with biharmonic excitation | We consider a damped impact oscillator subject to the action of a biharmonic
force. The conditions for the existence and stability of almost periodic
resonance solutions are investigated. | 1509.05381v1 |
2015-11-08 | On 2d incompressible Euler equations with partial damping | We consider various questions about the 2d incompressible Navier-Stokes and
Euler equations on a torus when dissipation is removed from or added to some of
the Fourier modes. | 1511.02530v1 |
2015-12-11 | The Ping Pong Pendulum | Many damped mechanical systems oscillate with increasing frequency as the
amplitude decreases. One popular example is Euler's Disk, where the point of
contact rotates with increasing rapidity as the energy is dissipated. We study
a simple mechanical pendulum that exhibits this behaviour. | 1512.03700v1 |
2016-01-26 | Fast convex optimization via inertial dynamics with Hessian driven damping | We first study the fast minimization properties of the trajectories of the
second-order evolution equation $$\ddot{x}(t) + \frac{\alpha}{t} \dot{x}(t) +
\beta \nabla^2 \Phi (x(t))\dot{x} (t) + \nabla \Phi (x(t)) = 0,$$ where
$\Phi:\mathcal H\to\mathbb R$ is a smooth convex function acting on a real
Hilbert space $\math... | 1601.07113v1 |
2016-03-28 | Stabilization of gravity water waves | This paper is devoted to the stabilization of the incompressible Euler
equation with free surface. We study the damping of two-dimensional gravity
waves by an absorbing beach where the water-wave energy is dissipated by using
the variations of the external pressure. | 1603.08541v1 |
2016-06-14 | Precession Relaxation of Viscoelastic Oblate Rotators | Perturbations of all sorts destabilise the rotation of a small body and leave
it in a non-principal spin state. In such a state, the body experiences
alternating stresses generated by the inertial forces. This yields nutation
relaxation, i.e., evolution of the spin towards the principal rotation about
the maximal-inert... | 1606.04559v3 |
2016-09-07 | Quasi-stability and Exponential Attractors for A Non-Gradient System---Applications to Piston-Theoretic Plates with Internal Damping | We consider a nonlinear (Berger or Von Karman) clamped plate model with a
{\em piston-theoretic} right hand side---which include non-dissipative,
non-conservative lower order terms. The model arises in aeroelasticity when a
panel is immersed in a high velocity linear potential flow; in this case the
effect of the flow ... | 1609.02211v1 |
2016-10-26 | On the region of attraction of phase-locked states for swing equations on connected graphs with inhomogeneous dampings | We consider the synchronization problem of swing equations, a second-order
Kuramoto-type model, on connected networks with inhomogeneous dampings. This
was largely motivated by its relevance to the dynamics of power grids. We focus
on the estimate of the region of attraction of synchronous states which is a
central pro... | 1610.08437v1 |
2016-10-31 | A quest for new physics inside the neutron | The lecture presents an overview of the quest for the new physics in low
energy neutron phenomena. In addition to the traditional topics the quantum
damping of $n$ $\bar{n}$ oscillations is discussed. | 1610.10046v1 |
2016-11-28 | First Demonstration of Electrostatic Damping of Parametric Instability at Advanced LIGO | Interferometric gravitational wave detectors operate with high optical power
in their arms in order to achieve high shot-noise limited strain sensitivity. A
significant limitation to increasing the optical power is the phenomenon of
three-mode parametric instabilities, in which the laser field in the arm
cavities is sc... | 1611.08997v1 |
2016-12-19 | Improving the efficiency of joint remote state preparation in noisy environment with weak measurement | Quantum secure communication provides a new way for protecting the security
of information. As an important component of quantum secure communication,
remote state preparation (RSP) can securely transmit a quantum state from a
sender to a remote receiver. The existence of quantum noise severely affects
the security and... | 1612.06020v1 |
2017-03-21 | Evidence for structural damping in a high-stress silicon nitride nanobeam and its implications for quantum optomechanics | We resolve the thermal motion of a high-stress silicon nitride nanobeam at
frequencies far below its fundamental flexural resonance (3.4 MHz) using
cavity-enhanced optical interferometry. Over two decades, the displacement
spectrum is well-modeled by that of a damped harmonic oscillator driven by a
$1/f$ thermal force,... | 1703.07134v2 |
2017-03-29 | Comment on "Spreading widths of giant resonances in spherical nuclei: damped transient response" by Severyukhin et al. [arXiv:1703.05710] | We argue whether physics of universal approach of Severyukhin et al.
[arXiv:1703.05710] is approved. | 1703.10003v1 |
2017-05-16 | Propagation of transition fronts in nonlinear chains with non-degenerate on-site potentials | We address the problem of a front propagation in chains with a bi-stable
nondegenerate on-site potential and a nonlinear gradient coupling. For a
generic nonlinear coupling, one encounters a special regime of transitions,
characterized by extremely narrow fronts, far supersonic velocities of
propagation and long waves ... | 1705.05555v1 |
2017-08-16 | The Frequency-dependent Damping of Slow Magnetoacoustic Waves in a Sunspot Umbral Atmosphere | High spatial and temporal resolution images of a sunspot, obtained
simultaneously in multiple optical and UV wavelengths, are employed to study
the propagation and damping characteristics of slow magnetoacoustic waves up to
transition region heights. Power spectra are generated from intensity
oscillations in sunspot um... | 1708.04835v1 |
2017-08-29 | Spin wave damping arising from phase coexistence below $T_c$ in colossal magnetoresistive La$_{0.7}$Ca$_{0.3}$MnO$_3$ | While the spin dynamics of La$_{0.7}$Ca$_{0.3}$MnO$_3$ in the ferromagnetic
phase are known to be unconventional, previous measurements have yielded
contradictory results regarding the damping of spin wave excitations. Neutron
spectroscopy measurements on a sample with a transition temperature of
$T_c$=257 K, higher th... | 1708.08960v2 |
2017-09-08 | Topological and Graph-coloring Conditions on the Parameter-independent Stability of Second-order Networked Systems | In this paper, we study parameter-independent stability in qualitatively
heterogeneous passive networked systems containing damped and undamped nodes.
Given the graph topology and a set of damped nodes, we ask if output consensus
is achieved for all system parameter values. For given parameter values, an
eigenspace ana... | 1709.02629v1 |
2017-10-11 | Collisional damping rates for plasma waves | The distinction between the plasma dynamics dominated by collisional
transport versus collective processes has never been rigorously addressed until
recently. A recent paper [Yoon et al., Phys. Rev. E 93, 033203 (2016)]
formulates for the first time, a unified kinetic theory in which collective
processes and collisiona... | 1710.03874v1 |
2017-10-20 | Tidal dissipation in rotating fluid bodies: the presence of a magnetic field | We investigate effects of the presence of a magnetic field on tidal
dissipation in rotating fluid bodies. We consider a simplified model consisting
of a rigid core and a fluid envelope, permeated by a background magnetic field
(either a dipolar field or a uniform axial field). The wavelike tidal responses
in the fluid ... | 1710.07690v2 |
2017-11-30 | Implications of dark matter cascade decay from DAMPE, HESS, Fermi-LAT and AMS02 data | Recent high-energy cosmic $e^\pm$ measurement from the DArk Matter Particle
Explorer (DAMPE) satellite confirms the deviation of total cosmic ray electron
spectrum above 700-900 GeV from a simple power law. In this paper we
demonstrate that the cascade decay of dark matter (DM) can account for DAMPE's
TeV $e^+e^-$ spec... | 1712.00370v3 |
2017-12-04 | Scalar dark matter, Type II Seesaw and the DAMPE cosmic ray $e^+ + e^-$ excess | The DArk Matter Particle Explorer (DAMPE) has reported a measurement of the
flux of high energy cosmic ray electrons plus positrons (CREs) in the energy
range between $25$ GeV and $4.6$ TeV. With unprecedented high energy
resolution, the DAMPE data exhibit an excess of the CREs flux at an energy of
around $1.4$ TeV. In... | 1712.00869v2 |
2017-12-07 | Nonlinear growth of structure in cosmologies with damped matter fluctuations | We investigate the nonlinear evolution of structure in variants of the
standard cosmological model which display damped density fluctuations relative
to cold dark matter (e.g. in which cold dark matter is replaced by warm or
interacting DM). Using N-body simulations, we address the question of how much
information is r... | 1712.02742v2 |
2017-12-11 | DAMPE excess from decaying right-handed neutrino dark matter | The flux of high-energy cosmic-ray electrons plus positrons recently measured
by the DArk Matter Particle Explorer (DAMPE) exhibits a tentative peak excess
at an energy of around $1.4$ TeV. In this paper, we consider the minimal gauged
$U(1)_{B-L}$ model with a right-handed neutrino (RHN) dark matter (DM) and
interpret... | 1712.03652v3 |
2017-12-11 | A Statistical Study on The Frequency-Dependent Damping of Slow-mode Waves in Polar Plumes and Interplumes | We perform a statistical study on the frequency-dependent damping of slow
waves propagating along polar plumes and interplumes in the solar corona.
Analysis of a large sample of extreme ultraviolet (EUV) imaging data with high
spatial and temporal resolutions obtained from AIA/SDO suggests an inverse
power-law dependen... | 1712.03673v1 |
2018-08-05 | Dispersion, damping, and intensity of spin excitations in the single-layer (Bi,Pb)$_{2}$(Sr,La)$_{2}$CuO$_{6+δ}$ cuprate superconductor family | Using Cu-$L_3$ edge resonant inelastic x-ray scattering (RIXS) we measured
the dispersion and damping of spin excitations (magnons and paramagnons) in the
high-$T_\mathrm{c}$ superconductor (Bi,Pb)$_{2}$(Sr,La)$_{2}$CuO$_{6+\delta}$
(Bi2201), for a large doping range across the phase diagram ($0.03\lesssim
p\lesssim0.2... | 1808.01682v1 |
2018-10-16 | Dark matter gets DAMPE | The DArk Matter Particle Explorer (DAMPE) recently reported an excess of
electrons/positrons above expected background fluxes even when a double
power-law background spectrum is assumed. Several dark matter models that
involve TeV-scale leptophilic WIMPs have been suggested in the literature to
account for this excess.... | 1810.07176v2 |
2018-11-15 | Damping rate of a fermion in ultradegenerate chiral matter | We compute the damping rate of a fermion propagating in a chiral plasma when
there is an imbalance between the densities of left- and right-handed fermions,
after generalizing the hard thermal loop resummation techniques for these
systems. In the ultradegenerate limit, for very high energies the damping rate
of this ex... | 1811.06394v3 |
2018-12-16 | Nonlinear Dynamics of Spherical Shells Buckling under Step Pressure | Dynamic buckling is addressed for complete elastic spherical shells subject
to a rapidly applied step in external pressure. Insights from the perspective
of nonlinear dynamics reveal essential mathematical features of the buckling
phenomena. To capture the strong buckling imperfection-sensitivity, initial
geometric imp... | 1812.06526v2 |
2019-01-09 | Turbulent dynamo in a weakly ionized medium | The small-scale turbulent dynamo is an important process contributing to the
cosmic magnetization. In partially ionized astrophysical plasmas, the dynamo
growth of magnetic energy strongly depends on the coupling state between ions
and neutrals and the ion-neutral collisional damping effect. A new damping
stage of turb... | 1901.02893v1 |
2019-01-25 | Quantum speed limit time for correlated quantum channel | Memory effects play a fundamental role in the dynamics of open quantum
systems. There exist two different views on memory for quantum noises. In the
first view, the quantum channel has memory when there exist correlations
between successive uses of the channels on a sequence of quantum systems. These
types of channels ... | 1901.08917v4 |
2019-02-17 | Finite-size effects on sound damping in stable computer glasses | In this brief note we comment on the recent results presented in
arXiv:1812.08736v1 | 1902.06225v1 |
2019-05-04 | A class of second-order geometric quasilinear hyperbolic PDEs and their application in imaging science | In this paper, we study damped second-order dynamics, which are quasilinear
hyperbolic partial differential equations (PDEs). This is inspired by the
recent development of second-order damping systems for accelerating energy
decay of gradient flows. We concentrate on two equations: one is a damped
second-order total va... | 1905.01457v2 |
2019-08-20 | Synthetic Extreme-ultraviolet Emissions Modulated by Leaky Fast Sausage Modes in Solar Active Region Loops | We study the extreme-ultraviolet (EUV) emissions modulated by leaky fast
sausage modes (FSMs) in solar active region loops and examine their
observational signatures via spectrometers like EIS. After computing fluid
variables of leaky FSMs with MHD simulations, we forward-model the intensity
and spectral properties of ... | 1908.07131v1 |
2019-10-24 | Frequency criteria for exponential stability | We discuss some frequency-domain criteria for the exponential stability of
nonlinear feedback systems based on dissipativity theory. Applications are
given to convergence rates for certain perturbations of the damped harmonic
oscillator. | 1910.10855v2 |
2019-11-05 | IW And-Type State in IM Eridani | IW And stars are a recently recognized group of dwarf novae which are
characterized by a repeated sequence of brightening from a standstill-like
phase with damping oscillations followed by a deep dip. Kimura et al. (2019)
recently proposed a model based on thermal-viscous disk instability in a tilted
disk to reproduce ... | 1911.01587v1 |
2019-11-28 | Magnon damping in the zigzag phase of the Kitaev-Heisenberg-$Γ$ model on a honeycomb lattice | We calculate magnon dispersions and damping in the Kitaev-Heisenberg model
with an off-diagonal exchange $\Gamma$ and isotropic third-nearest-neighbor
interaction $J_3$ on a honeycomb lattice. This model is relevant to a
description of the magnetic properties of iridium oxides $\alpha$-Li$_2$IrO$_3$
and Na$_2$IrO$_3$, ... | 1911.12829v2 |
2019-12-10 | A Stochastic Quasi-Newton Method for Large-Scale Nonconvex Optimization with Applications | This paper proposes a novel stochastic version of damped and regularized BFGS
method for addressing the above problems. | 1912.04456v1 |
2019-12-27 | Ultralow mechanical damping with Meissner-levitated ferromagnetic microparticles | Levitated nanoparticles and microparticles are excellent candidates for the
realization of extremely isolated mechanical systems, with a huge potential
impact in sensing applications and in quantum physics. Magnetic levitation
based on static fields is a particularly interesting approach, due to the
unique property of ... | 1912.12252v3 |
2020-01-22 | Wide Area Measurement System-based Low Frequency Oscillation Damping Control through Reinforcement Learning | Ensuring the stability of power systems is gaining more attraction today than
ever before, due to the rapid growth of uncertainties in load and renewable
energy penetration. Lately, wide area measurement system-based centralized
controlling techniques started providing a more flexible and robust control to
keep the sys... | 2001.07829v1 |
2020-02-13 | Semi-realistic tight-binding model for spin-orbit torques | We compute the spin-orbit torque in a transition metal heterostructure using
Slater-Koster parameterization in the two-center tight-binding approximation
and accounting for d-orbitals only. In this method, the spin-orbit coupling is
modeled within Russel-Saunders scheme, which enables us to treat interfacial
and bulk s... | 2002.05533v1 |
2020-02-14 | One-dimensional wave equation with set-valued boundary damping: well-posedness, asymptotic stability, and decay rates | This paper is concerned with the analysis of a one dimensional wave equation
$z_{tt}-z_{xx}=0$ on $[0,1]$ with a Dirichlet condition at $x=0$ and a damping
acting at $x=1$ which takes the form $(z_t(t,1),-z_x(t,1))\in\Sigma$ for every
$t\geq 0$, where $\Sigma$ is a given subset of $\mathbb R^2$. The study is
performed ... | 2002.06186v3 |
2020-03-30 | Optimal absorption of acoustical waves by a boundary | In the aim to find the simplest and most efficient shape of a noise absorbing
wall to dissipate the acoustical energy of a sound wave, we consider a
frequency model described by the Helmholtz equation with a damping on the
boundary. The well-posedness of the model is shown in a class of domains with
d-set boundaries (N... | 2003.13250v2 |
2020-04-24 | Suppression of the longitudinal coupled bunch instability in DA$Φ$NE in collisions with a crossing angle | In DAFNE, the Frascati $e^+e^-$ collider operating since 1998, an innovative
collision scheme, the crab waist, has been successfully implemented during the
years 2008-09. During operations for the Siddharta experiment an unusual
synchrotron oscillation damping effect induced by beam-beam collisions has been
observed. I... | 2004.11902v1 |
2020-05-08 | Separatrix crossing and symmetry breaking in NLSE-like systems due to forcing and damping | We theoretically and experimentally examine the effect of forcing and damping
on systems that can be described by the nonlinear Schr\"odinger equation
(NLSE), by making use of the phase-space predictions of the three-wave
truncation of the spectrum. In the latter, only the fundamental frequency and
the upper and lower ... | 2005.03931v1 |
2020-05-13 | Damping of a micro-electromechanical oscillator in turbulent superfluid $^4$He: A novel probe of quantized vorticity in the ultra-low temperature regime | We report a comprehensive investigation of the effects of quantum turbulence
and quantized vorticity in superfluid $^4$He on the motion of a
micro-electromechanical systems (MEMS) resonator. We find that the MEMS is
uniquely sensitive to quantum turbulence present in the fluid. To generate
turbulence in the fluid, a qu... | 2005.06570v1 |
2020-06-10 | Online PMU-Based Wide-Area Damping Control for Multiple Inter-Area Modes | This paper presents a new phasor measurement unit (PMU)-based wide-area
damping control (WADC) method to suppress the critical inter-area modes of
large-scale power systems. Modal participation factors, estimated by a
practically model-free system identification approach, are used to select the
most suitable synchronou... | 2006.05651v1 |
2020-06-14 | A general formulation for the magnetic oscillations in two dimensional systems | We develop a general formalism for the magnetic oscillations (MO) in two
dimensional (2D) systems. We consider general 2D Landau levels, which may
depend on other variable or indices, besides the perpendicular magnetic field.
In the ground state, we obtain expressions for the MO phase and amplitude. From
this we use a ... | 2006.07944v2 |
2020-08-26 | Quantum Lifshitz points and fluctuation-induced first-order phase transitions in imbalanced Fermi mixtures | We perform a detailed analysis of the phase transition between the uniform
superfluid and normal phases in spin- and mass-imbalanced Fermi mixtures. At
mean-field level we demonstrate that at temperature $T\to 0$ the gradient term
in the effective action can be tuned to zero for experimentally relevant sets
of paramete... | 2008.11782v1 |
2020-09-10 | Electron Landau Damping of Kinetic Alfvén Waves in Simulated Magnetosheath Turbulence | Turbulence is thought to play a role in the heating of the solar wind plasma,
though many questions remain to be solved regarding the exact nature of the
mechanisms driving this process in the heliosphere. In particular, the physics
of the collisionless interactions between particles and turbulent
electromagnetic field... | 2009.05010v1 |
2020-11-09 | Plasmon energy losses in shear bands of metallic glass | Shear bands resulting from plastic deformation in cold-rolled
Al$_{88}$Y$_{7}$Fe$_{5}$ metallic glass were observed to display alternating
density changes along their propagation direction. Electron-energy loss
spectroscopy (EELS) was used to investigate the volume plasmon energy losses in
and around shear bands. Energ... | 2011.04396v3 |
2020-11-16 | Thresholds for loss of Landau damping in longitudinal plane | Landau damping mechanism plays a crucial role in providing single-bunch
stability in LHC, High-Luminosity LHC, other existing as well as previous and
future (like FCC) circular hadron accelerators. In this paper, the thresholds
for the loss of Landau damping (LLD) in the longitudinal plane are derived
analytically usin... | 2011.07985v1 |
2020-12-04 | Quantum Circuits for Collective Amplitude Damping in Two-Qubit Systems | Quantum computers have now appeared in our society and are utilized for the
investigation of science and engineering. At present, they have been built as
intermediate-size computers containing about fifty qubits and are weak against
noise effects. Hence, they are called noisy-intermediate scale quantum devices.
In orde... | 2012.02410v1 |
2020-12-10 | Dimensional analysis of spring-wing systems reveals performance metrics for resonant flapping-wing flight | Flapping-wing insects, birds, and robots are thought to offset the high power
cost of oscillatory wing motion by using elastic elements for energy storage
and return. Insects possess highly resilient elastic regions in their flight
anatomy that may enable high dynamic efficiency. However, recent experiments
highlight l... | 2012.05428v1 |
2021-03-11 | Nontrivial damping of quantum many-body dynamics | Understanding how the dynamics of a given quantum system with many degrees of
freedom is altered by the presence of a generic perturbation is a notoriously
difficult question. Recent works predict that, in the overwhelming majority of
cases, the unperturbed dynamics is just damped by a simple function, e.g.,
exponentia... | 2103.06646v2 |
2021-03-24 | Multimode piezoelectric shunt damping of thin plates with arrays of separately shunted patches, method, and experimental validation | Two-dimensional thin plates are widely used in many applications. Shunt
damping is a promising way for the attenuation of vibration of these
electromechanical systems. It enables a compact vibration damping method
without adding significant mass and volumetric occupancy. Analyzing the
dynamics of such electromechanical... | 2103.13179v1 |
2021-04-09 | Taming the pinch singularities in the two-loop neutrino self-energy in a medium | We consider the calculation of the thermal self-energy of a neutrino that
propagates in a medium composed of fermions and scalars interacting via a
Yukawa-type coupling, in the case that the neutri no energy is much larger than
the fermion and scalar masses, as well as the temperature and chemical
potentials of the bac... | 2104.04459v2 |
2021-06-20 | Life-cycle assessment for flutter probability of a long-span suspension bridge based on field monitoring data | Assessment of structural safety status is of paramount importance for
existing bridges, where accurate evaluation of flutter probability is essential
for long-span bridges. In current engineering practice, at the design stage,
flutter critical wind speed is usually estimated by the wind tunnel test, which
is sensitive ... | 2106.10694v1 |
2021-07-28 | Optimal gamma-ray selections for monochromatic line searches with DAMPE | The DArk Matter Particle Explorer (DAMPE) is a space high-energy cosmic-ray
detector covering a wide energy band with a high energy resolution. One of the
key scientific goals of DAMPE is to carry out indirect detection of dark matter
by searching for high-energy gamma-ray line structure. To promote the
sensitivity of ... | 2107.13208v2 |
2021-07-28 | Magnetic field induced asymmetric splitting of the output signal | In this paper we have investigated the dynamics of a damped harmonic
oscillator in the presence of an electromagnetic field. The transients for the
two dimensional harmonic oscillator imply about the modulation of the frequency
of the oscillator by the velocity dependent non conservative force from an
applied magnetic ... | 2107.13305v1 |
2021-07-28 | Evolution of a Mode of Oscillation Within Turbulent Accretion Disks | We investigate the effects of subsonic turbulence on a normal mode of
oscillation [a possible origin of the high-frequency quasi-periodic
oscillations (HFQPOs) within some black hole accretion disks]. We consider
perturbations of a time-dependent background (steady state disk plus
turbulence), obtaining an oscillator e... | 2107.13546v1 |
2021-07-31 | Oscillating scalar dissipating in a medium | We study how oscillations of a scalar field condensate are damped due to
dissipative effects in a thermal medium. Our starting point is a non-linear and
non-local condensate equation of motion descending from a 2PI-resummed
effective action derived in the Schwinger-Keldysh formalism appropriate for
non-equilibrium quan... | 2108.00254v1 |
2021-08-02 | Large-amplitude longitudinal oscillations in solar prominences simulated with different resolutions | Large-amplitude longitudinal oscillations (LALOs) in solar prominences have
been widely studied in the last decades. However, their damping and
amplification mechanisms are not well understood. In this study, we investigate
the attenuation and amplification of LALOs using high-resolution numerical
simulations with prog... | 2108.01143v1 |
2021-08-05 | Complexity analysis of quantum teleportation via different entangled channels in the presence of noise | Quantum communication is one of the hot topics in quantum computing, where
teleportation of a quantum state has a slight edge and gained significant
attention from researchers. A large number of teleportation schemes have
already been introduced so far. Here, we compare the teleportation of a single
qubit message among... | 2108.02641v1 |
2021-08-06 | Noncontact friction: Role of phonon damping and its nonuniversality | While obtaining theoretical predictions for dissipation during sliding motion
is a difficult task, one regime that allows for analytical results is the
so-called noncontact regime, where a probe is weakly interacting with the
surface over which it moves. Studying this regime for a model crystal, we
extend previously ob... | 2108.03025v3 |
2021-09-14 | Design of a HOM-Damped 166.6 MHz Compact Quarter-Wave beta=1 Superconducting Cavity for High Energy Photon Source | Superconducting cavities with low RF frequencies and heavy damping of higher
order modes (HOM) are desired for the main accelerator of High Energy Photon
Source (HEPS), a 6 GeV synchrotron light source promising ultralow emittance
currently under construction in Beijing. A compact 166.6 MHz superconducting
cavity was p... | 2109.06560v1 |
2021-11-13 | Effects of microplastics and surfactants on surface roughness of water waves | In this paper, we study the flow physics underlying the recently developed
remote sensing capability of detecting oceanic microplastics, which is based on
the measurable surface roughness reduction induced by the presence of
microplastics on the ocean surface. In particular, we are interested in whether
this roughness ... | 2111.07021v1 |
2021-11-17 | United Nation Security Council in Quantum World: Experimental Realization of Quantum Anonymous Veto Protocols using IBM Quantum Computer | United Nation (UN) security council has fifteen members, out of which five
permanent members of the council can use their veto power against any
unfavorable decision taken by the council. In certain situation, a member using
right to veto may prefer to remain anonymous. This need leads to the
requirement of the protoco... | 2111.09028v1 |
2021-12-03 | The Importance of Electron Landau Damping for the Dissipation of Turbulent Energy in Terrestrial Magnetosheath Plasma | Heliospheric plasma turbulence plays a key role in transferring the energy of
large-scale magnetic field and plasma flow fluctuations to smaller scales where
the energy can be dissipated, ultimately leading to plasma heating.
High-quality measurements of electromagnetic fields and electron velocity
distributions by the... | 2112.02171v1 |
2022-01-01 | Extremely strong DLAs at high redshift: Gas cooling and H$_2$ formation | We present a spectroscopic investigation with VLT/X-shooter of seven
candidate extremely strong damped Lyman-$\alpha$ absorption systems (ESDLAs,
$N(\text{HI})\ge 5\times 10^{21}$ cm$^{-2}$) observed along quasar sightlines.
We confirm the extremely high column densities, albeit slightly (0.1~dex) lower
than the origin... | 2201.00245v1 |
2022-01-05 | Stability of the discrete time-crystalline order in spin-optomechanical and open cavity QED systems | Discrete time crystals (DTC) have been demonstrated experimentally in several
different quantum systems in the past few years. Spin couplings and cavity
losses have been shown to play crucial roles for realizing DTC order in open
many-body systems out of equilibrium. Recently, it has been proposed that
eternal and tran... | 2201.01568v2 |
2022-01-20 | Sharp resolvent estimate for the Baouendi-Grushin operator and applications | In this article we study the semiclassical resolvent estimate for the
non-selfadjoint Baouendi-Grushin operator on the two-dimensional torus
$\mathbb{T}^2=\mathbb{R}^2/(2\pi\mathbb{Z})^2$ with H\"older dampings. The
operator is subelliptic degenerating along the vertical direction at $x=0$. We
exhibit three different s... | 2201.08189v2 |
2022-02-24 | Coherence of ion cyclotron resonance for damping ion cyclotron waves in space plasmas | Ion cyclotron resonance is one of the fundamental energy conversion processes
through field-particle interaction in collisionless plasmas. However, the key
evidence for ion cyclotron resonance (i.e., the coherence between
electromagnetic fields and the ion phase space density) and the resulting
damping of ion cyclotron... | 2202.11967v1 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.