publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
|---|---|---|---|
2015-01-30 | A large-scale magnetic shield with 10^6 damping at mHz frequencies | We present a magnetically shielded environment with a damping factor larger
than one million at the mHz frequency regime and an extremely low field and
gradient over an extended volume. This extraordinary shielding performance
represents an improvement of the state of the art in damping the difficult
regime of very low... | 1501.07861v4 |
2015-02-01 | A Study on the Impact of Wind Generation on the Stability of Electromechanical Oscillations | Wind is becoming an increasingly significant source of energy in modern power
generation. Amongst existing technologies, Variable Speed Wind Turbines (VSWT)
equipped with Double Fed Induction Generators (DFIG) is widely deployed.
Consequently, power systems are now experiencing newer power flow patterns and
operating c... | 1502.00215v1 |
2015-02-16 | Biomimetic Staggered Composites with Highly Enhanced Energy Dissipation: Design, Modeling, and Test | We investigate the damping enhancement in a class of biomimetic staggered
composites via a combination of design, modeling, and experiment. In total,
three kinds of staggered composites are designed by mimicking the structure of
bone and nacre. These composite designs are realized by 3D printing a rigid
plastic and a v... | 1502.04568v1 |
2015-02-24 | High Quality Yttrium Iron Garnet Grown by Room Temperature Pulsed Laser Deposition and Subsequent Annealing | We have investigated recrystallization of amorphous Yttrium Iron Garnet (YIG)
by annealing in oxygen atmosphere. Our findings show that well below the
melting temperature the material transforms into a fully epitaxial layer with
exceptional quality, both structural and magnetic.\\ In ferromagnetic resonance
(FMR) ultra... | 1502.06724v2 |
2015-03-02 | DAMPE silicon tracker on-board data compression algorithm | The Dark Matter Particle Explorer (DAMPE) is an upcoming scientific satellite
mission for high energy gamma-ray, electron and cosmic rays detection. The
silicon tracker (STK) is a sub detector of the DAMPE payload with an excellent
position resolution (readout pitch of 242um), which measures the incident
direction of p... | 1503.00415v1 |
2015-03-08 | MHD Seismology of a loop-like filament tube by observed kink waves | We report and analyze the observational evidence of global kink oscillations
in a solar filament as observed in H alpha by National Solar Observatory
(NSO)/Global Oscillation Network Group (GONG) instrument. An M1.1-class flare
in active region 11692 on 2013 March 15 induced a global kink mode in the
filament lying in ... | 1503.02281v1 |
2015-03-13 | Comparison of spin-orbit torques and spin pumping across NiFe/Pt and NiFe/Cu/Pt interfaces | We experimentally investigate spin-orbit torques and spin pumping in NiFe/Pt
bilayers with direct and interrupted interfaces. The damping-like and
field-like torques are simultaneously measured with spin-torque ferromagnetic
resonance tuned by a dc bias current, whereas spin pumping is measured
electrically through the... | 1503.04104v3 |
2015-03-24 | Global weak solutions to compressible quantum Navier-Stokes equations with damping | The global-in-time existence of weak solutions to the barotropic compressible
quantum Navier-Stokes equations with damping is proved for large data in three
dimensional space. The model consists of the compressible Navier-Stokes
equations with degenerate viscosity, and a nonlinear third-order differential
operator, wit... | 1503.06894v4 |
2015-03-30 | Suppression of Spin Pumping Between Ni$_{80}$Fe$_{20}$ and Cu by a Graphene Interlayer | We compare ferromagnetic resonance measurements of Permalloy
Ni$_{80}$Fe$_{20}$ (Py) films sputtered onto Cu(111) films with and without a
graphene (Gr) interlayer grown by chemical vapor deposition before Py
deposition. A two-angle sputtering method ensured that neither Gr nor Py was
degraded by the sample preparation... | 1503.08777v1 |
2015-04-02 | Protecting the $\sqrt{SWAP}$ operation from general and residual errors by continuous dynamical decoupling | We study the occurrence of errors in a continuously decoupled two-qubit state
during a $\sqrt{SWAP}$ quantum operation under decoherence. We consider a
realization of this quantum gate based on the Heisenberg exchange interaction,
which alone suffices for achieving universal quantum computation. Furthermore,
we introdu... | 1504.00592v1 |
2015-04-07 | Damped Oscillating Dark Energy: Ideal Fluid and Scalar-Tensor description | In this paper, we study damped oscillating form of dark energy for explaining
dynamics of universe. First of all, we consider universe is filled with an
ideal fluid which has damped oscillating dark energy in terms of this case we
calculate several physical quantities such as Hubble parameter, acceleration
parameter, e... | 1504.01509v2 |
2015-04-09 | Periodic-coefficient damping estimates, and stability of large-amplitude roll waves in inclined thin film flow | A technical obstruction preventing the conclusion of nonlinear stability of
large-Froude number roll waves of the St. Venant equations for inclined thin
film flow is the "slope condition" of Johnson-Noble-Zumbrun, used to obtain
pointwise symmetrizability of the linearized equations and thereby
high-frequency resolvent... | 1504.02292v1 |
2015-04-17 | Temperature-dependent Plasmons and Their Damping Rates for Graphene with a Finite Energy Bandgap | We obtained numerical and closed-form analytic expressions for
finite-temperature plasmon dispersion relations for intrinsic graphene in the
presence of a finite energy gap in the energy spectrum. The calculations were
carried out using the random-phase approximation. The analytic results have
been derived in the high ... | 1504.04552v1 |
2015-05-08 | Existence and general stabilization of the Timoshenko system with a thermo-viscoelastic damping and a delay term in the internal feedback | In this paper, we consider a Timoshenko system with a thermo-viscoelastic
damping and a delay term in the internal feedback together with initial datum
and boundary conditions of Dirichlet type, where g is a positive non-increasing
relaxation function and {\mu}1, {\mu}2 are positive constants. Under an
hypothesis betwe... | 1505.01899v1 |
2015-05-09 | Existence, general decay and blow-up of solutions for a viscoelastic Kirchhoff equation with Balakrishnan-Taylor damping and dynamic boundary conditions | Our aim in this article is to study a nonlinear viscoelastic Kirchhoff
equation with strong damping, Balakrishnan-Taylor damping, nonlinear source and
dynamical boundary condition. Firstly, we prove the local existence of
solutions by using the Faedo-Galerkin approximation method combined with a
contraction mapping the... | 1505.02220v3 |
2015-06-03 | Migration of two massive planets into (and out of) first order mean motion resonances | We consider the dynamical evolution of two planets orbiting in the vicinity
of a first order mean motion reso- nance while simultaneously undergoing
eccentricity damping and convergent migration. Following Goldreich &
Schlichting (2014), we include a coupling between the dissipative semimajor
axis evolution and the dam... | 1506.01382v1 |
2015-06-12 | Linear inviscid damping for monotone shear flows in a finite periodic channel, boundary effects, blow-up and critical Sobolev regularity | In a previous article, \cite{Zill3}, we have established linear inviscid
damping for a large class of monotone shear flows in a finite periodic channel
and have further shown that boundary effects asymptotically lead to the
formation of singularities of derivatives of the solution. As the main results
of this article, ... | 1506.04010v1 |
2015-06-12 | Nonlinear damped partial differential equations and their uniform discretizations | We establish sharp energy decay rates for a large class of nonlinearly
first-order damped systems, and we design discretization schemes that inherit
of the same energy decay rates, uniformly with respect to the space and/or time
discretization parameters, by adding appropriate numerical viscosity terms. Our
main argume... | 1506.04163v2 |
2015-06-17 | Landau Damping of Electrostatic Waves in Arbitrarily Degenerate Quantum Plasmas | We carry out a systematic study of the dispersion relation for linear
electrostatic waves in an arbitrarily degenerate quantum electron plasma. We
solve for the complex frequency spectrum for arbitrary values of wavenumber $k$
and level of degeneracy $\mu$. Our finding is that for large $k$ and high $\mu$
the real part... | 1506.05494v2 |
2015-06-25 | Simultaneous Interconnection and Damping Assignment Passivity-based Control of Mechanical Systems Using Generalized Forces | To extend the realm of application of the well known controller design
technique of interconnection and damping assignment passivity-based control
(IDA-PBC) of mechanical systems two modifications to the standard method are
presented in this article. First, similarly to [1], it is proposed to avoid the
splitting of the... | 1506.07679v1 |
2015-07-20 | Bifurcation of the quasinormal spectrum and Zero Damped Modes for rotating dilatonic black holes | It has been recently found that for the near extremal Kerr black holes
appearing of Zero Damped Modes (accompanied by qusinormal mode branching)
signifies about inapplicability of the regime of small perturbations and the
onset of turbulence. Here we show that this phenomena is not limited by Kerr or
Kerr-Newman soluti... | 1507.05649v1 |
2015-07-24 | Effect of Landau damping on alternative ion-acoustic solitary waves in a magnetized plasma consisting of warm adiabatic ions and non-thermal electrons | Bandyopadhyay and Das [Phys. Plasmas, 9, 465-473, 2002] have derived a
nonlinear macroscopic evolution equation for ion acoustic wave in a magnetized
plasma consisting of warm adiabatic ions and non-thermal electrons including
the effect of Landau damping. In that paper they have also derived the
corresponding nonlinea... | 1507.06733v1 |
2015-08-05 | Quantum discord protection from amplitude damping decoherence | Entanglement is known to be an essential resource for many quantum
information processes. However, it is now known that some quantum features may
be acheived with quantum discord, a generalized measure of quantum correlation.
In this paper, we study how quantum discord, or more specifically, the measures
of entropic di... | 1508.00972v1 |
2015-09-03 | Stability analysis of degenerately-damped oscillations | Presented here is a study of well-posedness and asymptotic stability of a
"degenerately damped" PDE modeling a vibrating elastic string. The coefficient
of the damping may vanish at small amplitudes thus weakening the effect of the
dissipation. It is shown that the resulting dynamical system has strictly
monotonically ... | 1509.00917v1 |
2015-09-27 | On the well-posedness and asymptotic behavior of the generalized KdV-Burgers equation | In this paper we are concerned with the well-posedness and the exponential
stabilization of the generalized Korteweg-de Vries Burgers equation, posed on
the whole real line, under the effect of a damping term. Both problems are
investigated when the exponent p in the nonlinear term ranges over the interval
$[1,5)$. We ... | 1509.08148v1 |
2015-10-11 | Error estimates of finite element method for semi-linear stochastic strongly damped wave equation | In this paper, we consider a semi-linear stochastic strongly damped wave
equation driven by additive Gaussian noise. Following a semigroup framework, we
establish existence, uniqueness and space-time regularity of a mild solution to
such equation. Unlike the usual stochastic wave equation without damping, the
underlyin... | 1510.03028v1 |
2015-11-10 | A study of energy correction for the electron beam data in the BGO ECAL of the DAMPE | The DArk Matter Particle Explorer (DAMPE) is an orbital experiment aiming at
searching for dark matter indirectly by measuring the spectra of photons,
electrons and positrons originating from deep space. The BGO electromagnetic
calorimeter is one of the key sub-detectors of the DAMPE, which is designed for
high energy ... | 1511.02998v1 |
2015-11-10 | Quantum Fisher and Skew information for Unruh accelerated Dirac qubit | We develop a Bloch vector representation of Unruh channel for a Dirac field
mode. This is used to provide a unified, analytical treatment of quantum Fisher
and Skew information for a qubit subjected to the Unruh channel, both in its
pure form as well as in the presence of experimentally relevant external noise
channels... | 1511.03029v1 |
2015-11-23 | Detection of high frequency oscillations and damping from multi-slit spectroscopic observations of the corona | During the total solar eclipse of 11 July 2010, multi-slit spectroscopic
observations of the solar corona were performed from Easter Island, Chile. To
search for high-frequency waves, observations were taken at a high cadence in
the green line at 5303 A due to [Fe xiv] and the red line at 6374 A due to [Fe
x]. The data... | 1511.07160v1 |
2015-11-26 | Uniform exponential stability of Galerkin approximations for damped wave systems | We consider the numerical approximation of linear damped wave systems by
Galerkin approximations in space and appropriate time-stepping schemes. Based
on a dissipation estimate for a modified energy, we prove exponential decay of
the physical energy on the continuous level provided that the damping is
effective everywh... | 1511.08341v1 |
2015-12-01 | Epitaxial patterning of nanometer-thick Y3Fe5O12 films with low magnetic damping | Magnetic insulators such as yttrium iron garnet, Y3Fe5O12, with extremely low
magnetic damping have opened the door for low power spin-orbitronics due to
their low energy dissipation and efficient spin current generation and
transmission. We demonstrate reliable and efficient epitaxial growth and
nanopatterning of Y3Fe... | 1512.00286v1 |
2015-12-03 | Probing Bogoliubov quasiparticles in superfluid $^3$He with a 'vibrating-wire like' MEMS device | We have measured the interaction between superfluid $^3$He-B and a
micro-machined goalpost-shaped device at temperatures below $0.2\,T_c$. The
measured damping follows well the theory developed for vibrating wires, in
which the Andreev reflection of quasiparticles in the flow field around the
moving structure leads to ... | 1512.01033v1 |
2016-01-03 | Event-triggered Communication in Wide-area Damping Control: A Limited Output Feedback Based Approach | A conceptual design methodology is proposed for event-triggered based power
system wide area damping controller. The event-triggering mechanism is adopted
to reduce the communication burden between origin of the remote signal and the
wide area damping controller (WADC) location. The remote signal is transmitted
to the ... | 1601.00255v1 |
2016-01-05 | Lie transformation method on quantum state evolution of a general time-dependent driven and damped parametric oscillator | A variety of dynamics in nature and society can be approximately treated as a
driven and damped parametric oscillator. An intensive investigation of this
time-dependent model from an algebraic point of view provides a consistent
method to resolve the classical dynamics and the quantum evolution in order to
understand t... | 1601.00727v3 |
2016-02-19 | Distinctive response of many-body localized systems to strong electric field | We study systems which are close to or within the many-body localized (MBL)
regime and are driven by strong electric field. In the ergodic regime, the
disorder extends applicability of the equilibrium linear--response theory to
stronger drivings, whereas the response of the MBL systems is very distinctive,
revealing cu... | 1602.06055v1 |
2016-02-24 | Pressure of a gas of underdamped active dumbbells | The pressure exerted on a wall by a gas at equilibrium does not depend on the
shape of the confining potential defining the wall. In contrast, it has been
shown recently [A.P. Solon et al., Nat. Phys. 11, 673 (2015)] that a gas of
overdamped active particles exerts on a wall a force that depends on the
confining potent... | 1602.07420v1 |
2016-03-07 | Optimal Load and Stiffness for Displacement-Constrained Vibration Energy Harvesters | The power electronic interface to a vibration energy harvester not only
provides ac-dc conversion, but can also set the electrical damping to maximize
output power under displacement-constrained operation. This is commonly
exploited for linear two-port harvesters by synchronous switching to realize a
Coulomb-damped res... | 1603.01909v1 |
2016-03-22 | Generation and protection of steady-state quantum correlations due to quantum channels with memory | We have proposed a scheme of the generation and preservation of two-qubit
steady state quantum correlations through quantum channels where successive
uses of the channels are correlated. Different types of noisy channels with
memory, such as amplitude damping, phase-damping, and depolarizing channels
have been taken in... | 1603.06676v2 |
2016-03-31 | Recovery of time-dependent damping coefficients and potentials appearing in wave equations from partial data | We consider the inverse problem of determining a time-dependent damping
coefficient $a$ and a time-dependent potential $q$, appearing in the wave
equation $\partial_t^2u-\Delta_x u+a(t,x)\partial_tu+q(t,x)u=0$ in
$Q=(0,T)\times\Omega$, with $T>0$ and $\Omega$ a $ \mathcal C^2$ bounded domain
of $\mathbb R^n$, $n\geq2$,... | 1603.09600v2 |
2016-04-22 | Feedback-induced Bistability of an Optically Levitated Nanoparticle: A Fokker-Planck Treatment | Optically levitated nanoparticles have recently emerged as versatile
platforms for investigating macroscopic quantum mechanics and enabling
ultrasensitive metrology. In this article we theoretically consider two damping
regimes of an optically levitated nanoparticle cooled by cavityless parametric
feedback. Our treatme... | 1604.06767v2 |
2016-05-06 | Multidimensional Thermoelasticity for Nonsimple Materials -- Well-Posedness and Long-Time Behavior | An initial-boundary value problem for the multidimensional type III
thermoelaticity for a nonsimple material with a center of symmetry is
considered. In the linear case, the well-posedness with and without
Kelvin-Voigt and/or frictional damping in the elastic part as well as the lack
of exponential stability in the ela... | 1605.02049v1 |
2016-05-16 | The Cauchy problem for the nonlinear damped wave equation with slowly decaying data | We study the Cauchy problem for the nonlinear damped wave equation and
establish the large data local well-posedness and small data global
well-posedness with slowly decaying initial data. We also prove that the
asymptotic profile of the global solution is given by a solution of the
corresponding parabolic problem, whi... | 1605.04616v2 |
2016-05-20 | High-frequency behavior of FeN thin films fabricated by reactive sputtering | We investigated high-frequency behavior of FeN thin films prepared by
reactive sputtering through ferromagnetic resonance (FMR) and its relationship
with the static magnetic properties. The FMR was observed in the frequency
range from 2 to 18 GHz in the FeN films fabricated at proper nitrogen flow rate
(NFR). In those ... | 1605.06179v1 |
2016-05-26 | Thickness and temperature dependence of the magnetodynamic damping of pulsed laser deposited $\text{La}_{0.7}\text{Sr}_{0.3}\text{MnO}_3$ on (111)-oriented SrTi$\text{O}_3$ | We have investigated the magnetodynamic properties of
$\text{La}_{0.7}\text{Sr}_{0.3}\text{MnO}_3$ (LSMO) films of thickness 10, 15
and 30 nm grown on (111)-oriented SrTi$\text{O}_3$ (STO) substrates by pulsed
laser deposition. Ferromagnetic resonance (FMR) experiments were performed in
the temperature range 100--300 K... | 1605.08195v2 |
2016-06-08 | Effect of quantum noise on deterministic joint remote state preparation of a qubit state via a GHZ channel | Quantum secure communication brings a new direction for information security.
As an important component of quantum secure communication, deterministic joint
remote state preparation (DJRSP) could securely transmit a quantum state with
100\% success probability. In this paper, we study how the efficiency of DJRSP
is aff... | 1606.02484v2 |
2016-06-28 | Radiation Damping by Thomson Scattering | Synchrotron radiation of relativistic electrons in storage rings naturally
leads to the process of damping of betatron oscillations. Damping time and
transverse beam emittance can be reduced by wigglers or undulators while the
beam parameters are still well defined by the common radiation integrals, based
on the proper... | 1606.08602v5 |
2016-06-29 | Kinodynamic Motion Planning: A Novel Type Of Nonlinear, Passive Damping Forces And Advantages | This article extends the capabilities of the harmonic potential field
approach to planning to cover both the kinematic and dynamic aspects of a robot
motion. The suggested approach converts the gradient guidance field from a
harmonic potential to a control signal by augmenting it with a novel type of
damping forces cal... | 1606.09270v1 |
2016-07-20 | Envelope equation for the linear and nonlinear propagation of an electron plasma wave, including the effects of Landau damping, trapping, plasma inhomogeneity, and the change in the state of wave | This paper addresses the linear and nonlinear three-dimensional propagation
of an electron wave in a collisionless plasma that may be inhomogeneous,
nonstationary, anisotropic and even weakly magnetized. The wave amplitude,
together with any hydrodynamic quantity characterizing the plasma (density,
temperature,...) are... | 1607.05844v2 |
2016-09-02 | Particle dynamics and Stochastic Resonance in Periodic potentials | We have studied the dynamics of a particle in a periodically driven
underdamped periodic potential. Recent studies have reported the occurrence of
Stochastic Resonance (SR) in such systems in the high frequency regime, using
input energy per period of external drive as a quantifier. The particle
trajectories in these s... | 1609.00678v1 |
2016-09-26 | An efficient quantum algorithm for spectral estimation | We develop an efficient quantum implementation of an important signal
processing algorithm for line spectral estimation: the matrix pencil method,
which determines the frequencies and damping factors of signals consisting of
finite sums of exponentially damped sinusoids. Our algorithm provides a quantum
speedup in a na... | 1609.08170v1 |
2016-10-01 | On the regularization of impact without collision: the Painlevé paradox and compliance | We consider the problem of a rigid body, subject to a unilateral constraint,
in the presence of Coulomb friction. We regularize the problem by assuming
compliance (with both stiffness and damping) at the point of contact, for a
general class of normal reaction forces. Using a rigorous mathematical
approach, we recover ... | 1610.00143v2 |
2016-11-25 | Bulk viscous corrections to screening and damping in QCD at high temperatures | Non-equilibrium corrections to the distribution functions of quarks and
gluons in a hot and dense QCD medium modify the "hard thermal loops" (HTL). The
HTLs determine the retarded, advanced, and symmetric (time-ordered) propagators
for gluons with soft momenta as well as the Debye screening and Landau damping
mass scal... | 1611.08379v2 |
2016-12-07 | Investigation of Stimulated Brillouin Scattering in Laser-Plasma Interactions | In this paper, we present our numerical simulation results on the Stimulated
Brillouin Scattering (SBS) with injection of an ordinary mode (O-mode)
electromagnetic wave (our pump wave) with frequencies 70 GHz and 110 GHz.
Solving the Fourier transformed Vlasov equation in the velocity space, creates
a profile for distr... | 1612.02214v1 |
2016-12-08 | Damped spin-wave excitations in the itinerant antiferromagnet $γ$-Fe$_{0.7}$Mn$_{0.3}$ | The collective spin-wave excitations in the antiferromagnetic state of
$\gamma$-Fe$_{0.7}$Mn$_{0.3}$ were investigated using the inelastic neutron
scattering technique. The spin excitations remain isotropic up to the high
excitation energy, ${\hbar\omega}= 78$ meV. The excitations gradually become
broad and damped abov... | 1612.02515v2 |
2016-12-09 | How strong a logistic damping can prevent blow-up for the minimal Keller-Segel chemotaxis system? | In this paper, we study the minimal Keller-Segel model with a logistic source
and obtain quantitative and qualitative descriptions of the competition between
logistic damping and other ingredient, especially, chemotactic aggregation to
guarantee boundedness and convergence. More specifically, we establish how
precisely... | 1612.03024v2 |
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 |
2017-03-28 | Singularity formation for the 1D compressible Euler equation with variable damping coefficient | In this paper, we consider some blow-up problems for the 1D Euler equation
with time and space dependent damping. We investigate sufficient conditions on
initial data and the rate of spatial or time-like decay of the coefficient of
damping for the occurrence of the finite time blow-up. In particular, our
sufficient con... | 1703.09821v3 |
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 |
2017-05-10 | Negative mobility of a Brownian particle: strong damping regime | We study impact of inertia on directed transport of a Brownian particle under
non-equilibrium conditions: the particle moves in a one-dimensional periodic
and symmetric potential, is driven by both an unbiased time-periodic force and
a constant force, and is coupled to a thermostat of temperature T. Within
selected par... | 1705.03661v1 |
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 |
2017-08-30 | Convergence to diffusion waves for solutions of Euler equations with time-depending damping on quadrant | This paper is concerned with the asymptotic behavior of the solution to the
Euler equations with time-depending damping on quadrant $(x,t)\in
\mathbb{R}^+\times\mathbb{R}^+$, \begin{equation}\notag \partial_t v
-
\partial_x u=0, \qquad \partial_t u
+
\partial_x p(v)
=\displaystyle
-\frac{\alpha}{(1+t)^\lamb... | 1708.09127v1 |
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 |
2017-11-01 | Tunable magnetization relaxation of Fe_{2}Cr_{1-x}Co_{x}Si half-metallic Heusler alloys by band structure engineering | We report a systematic investigation on the magnetization relaxation
properties of iron-based half-metallic Heusler alloy
Fe$_{2}$Cr$_{1-x}$Co_${x}$Si (FCCS) thin films using broadband angular-resolved
ferromagnetic resonance. Band structure engineering through Co doping (x)
demonstrated by first-principles calculation... | 1711.00406v1 |
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 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.