publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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2013-07-31 | Intrabeam Scattering Studies at CesrTA | Intrabeam scattering (IBS) limits the emittance and single-bunch current that
can be achieved in electron or positron storage ring colliders, damping rings,
and light sources. Much theoretical work on IBS exists, and while the theories
have been validated in hadron and ion machines, the presence of strong damping
makes... | 1308.0035v2 |
2013-08-05 | Radiative damping and emission signatures of strong superluminal waves in pulsar winds | We analyse the damping by radiation reaction and by Compton drag of strong,
superluminal electromagnetic waves in the context of pulsar winds. The
associated radiation signature is found by estimating the efficiency and the
characteristic radiation frequencies. Applying these estimates to the gamma-ray
binary containin... | 1308.0950v2 |
2013-08-09 | Scale breaking and fluid dynamics in a dilute two-dimensional Fermi gas | We study two observables related to the anomalous breaking of scale
invariance in a dilute two dimensional Fermi gas, the frequency shift and
damping rate of the monopole mode in a harmonic confinement potential. For this
purpose we compute the speed of sound and the bulk viscosity of the two
dimensional gas in the hig... | 1308.2004v1 |
2013-08-14 | Reentrant classicality of a damped system | For a free particle, the coupling to its environment can be the relevant
mechanism to induce quantum behavior as the temperature is lowered. We study
general linear environments with a spectral density proportional to {\omega}^s
at low frequencies and consider in particular the specific heat of the free
damped particle... | 1308.3049v1 |
2013-08-20 | Group classification and exact solutions of variable-coefficient generalized Burgers equations with linear damping | Admissible point transformations between Burgers equations with linear
damping and time-dependent coefficients are described and used in order to
exhaustively classify Lie symmetries of these equations. Optimal systems of
one- and two-dimensional subalgebras of the Lie invariance algebras obtained
are constructed. The ... | 1308.4265v2 |
2013-08-31 | Recent developments in the determination of the amplitude and phase of quantum oscillations for the linear chain of coupled orbits | De Haas-van Alphen oscillations are studied for Fermi surfaces (FS)
illustrating the model proposed by Pippard in the early sixties, namely the
linear chain of orbits coupled by magnetic breakdown. This FS topology is
relevant for many multiband quasi-two dimensional (q-2D) organic metals such as
$\kappa$-(BEDT-TTF)$_2... | 1309.0102v1 |
2013-09-04 | Surface Waves in the paritally ionized solar plasma slab | The properties of surface waves in the partially ionized, incompressible
magnetized plasma slab are investigated in the present work. The waves are
affected by the non ideal MHD effects which causes the finite drift of the
magnetic field in the medium. When the finite drift of the magnetic field is
ignored, the charact... | 1309.0881v1 |
2013-09-04 | Origin and reduction of wakefields in photonic crystal accelerator cavities | Photonic crystal (PhC) defect cavities that support an accelerating mode tend
to trap unwanted higher-order modes (HOMs) corresponding to zero-group-velocity
PhC lattice modes at the top of the bandgap. The effect is explained quite
generally from photonic band and perturbation theoretical arguments. Transverse
wakefie... | 1309.0914v2 |
2013-09-14 | Damping of the quadrupole mode in a two-dimensional Fermi gas | In a recent experiment [E. Vogt et al., Phys. Rev. Lett. 108, 070404 (2012)],
quadrupole and breathing modes of a two-dimensional Fermi gas were studied. We
model these collective modes by solving the Boltzmann equation via the method
of phase-space moments up to fourth order, including in-medium effects on the
scatter... | 1309.3651v2 |
2013-09-24 | Spin-driven tidal pumping: Tidally driven changes in planetary spin coupled with secular interactions between planets | In a multiplanet system, tides acting on the inner planet can significantly
affect the orbital evolution of the entire system. While tides usually damp
eccentricities, a novel mechanism identified by Correia et al. (2012) tends to
raise eccentricities as a result of the tides' effect on the inner planet's
rotation. Our... | 1309.6279v1 |
2013-10-01 | The extrema of an action principle for dissipative mechanical systems | A least action principle for damping motion has been previously proposed with
a Hamiltonian and a Lagrangian containing the energy dissipated by friction.
Due to the space-time nonlocality of the Lagrangian, mathematical uncertainties
persist about the appropriate variational calculus and the nature (maxima,
minima and... | 1310.0455v1 |
2013-10-02 | Effectiveness of Depolarizing noise in causing sudden death of entanglement | Continuing on the recent observation that sudden death of entanglement can
occur even when a single qubit of a two qubit state is exposed to noisy
environment, we examine the local effects of several noises on bipartite
qubit-qutrit and qutrit-qutrit systems. In order to rule out any initial
interactions with environme... | 1310.0715v1 |
2013-10-09 | Improved Coincident and Coherent Detection Statistics for Searches for Gravitational Wave Ringdown Signals | We study an improved method for detecting gravitational wave (GW) signals
from perturbed black holes by earth-based detectors in the quest for searching
for intermediate-mass black holes (IMBHs). Such signals, called ringdowns, are
damped sinusoids whose frequency and damping constant can be used to measure a
black hol... | 1310.2341v2 |
2013-10-11 | New foundations and unification of basic plasma physics by means of classical mechanics | The derivation of Debye shielding and Landau damping from the $N$-body
description of plasmas requires many pages of heavy kinetic calculations in
classical textbooks and is done in distinct, unrelated chapters. Using Newton's
second law for the $N$-body system, we perform this derivation in a few steps
with elementary... | 1310.3096v1 |
2013-10-18 | Analytical considerations for linear and nonlinear optimization of the TME cells. Application to the CLIC pre-damping rings | The theoretical minimum emittance cells are the optimal configurations for
achieving the absolute minimum emittance, if specific optics constraints are
satisfied at the middle of the cell's dipole. Linear lattice design options
based on an analytical approach for the theoretical minimum emittance cells are
presented in... | 1310.5024v1 |
2013-10-20 | Electromagnetic waves in an axion-active relativistic plasma non-minimally coupled to gravity | We consider cosmological applications of a new self-consistent system of
equations, accounting for a nonminimal coupling of the gravitational,
electromagnetic and pseudoscalar (axion) fields in a relativistic plasma. We
focus on dispersion relations for electromagnetic perturbations in an initially
isotropic ultrarelat... | 1310.5333v2 |
2013-10-25 | Effect of resonance on the existence of periodic solutions for strongly damped wave equation | We are interested in the differential equation $\ddot u(t) = -A u(t) - c A
\dot u(t) + \lambda u(t) + F(t,u(t))$, where $c > 0$ is a damping factor, $A$
is a sectorial operator and $F$ is a continuous map. We consider the situation
where the equation is at resonance at infinity, which means that $\lambda$ is
an eigenva... | 1310.6794v4 |
2013-10-25 | Voltage noise, switching rates, and multiple phase-slips in moderately damped Josephson junctions | We study the voltage noise properties including the switching rates and
statistics of phase-slips in moderately damped Josephson junctions using a
novel efficient numerical approach combining the matrix continued-fraction
method with the full counting statistics. By analyzing the noise results
obtained for the RCSJ mod... | 1310.6871v1 |
2013-11-06 | Analytical estimation of ATF beam halo distribution | In order to study the background status in the ATF2 beam line and the
interaction point (IP), this paper developed an analytical method to give the
estimation of ATF beam halo distribution based on K. Hirata and K. Yokoya's
theory. The equilibrium particle distribution of beam tail in ATF damping ring,
when each electr... | 1311.1267v3 |
2013-11-13 | Quantum turbulence in superfluids with wall-clamped normal component | In Fermi superfluids, like superfluid 3He, the viscous normal component can
be considered to be stationary with respect to the container. The normal
component interacts with the superfluid component via mutual friction which
damps the motion of quantized vortex lines and eventually couples the
superfluid component to t... | 1311.3112v1 |
2013-11-19 | Protecting qutrit-qutrit entanglement by weak measurement and reversal | Entangled states in high dimensional systems are of great interest due to the
extended possibilities they provide in quantum information processing.
Recently, Sun et al. [Phys. Rev. A 82, 052323 (2010)] and Kim et al. [Nat.
Phys. 8, 117 (2012)] pointed out that weak measurement and quantum weak
measurement reversal can... | 1311.4692v2 |
2013-11-27 | Encapsulated formulation of the Selective Frequency Damping method | We present an alternative "encapsulated" formulation of the Selective
Frequency Damping method for finding unstable equilibria of dynamical systems,
which is particularly useful when analysing the stability of fluid flows. The
formulation makes use of splitting methods, which means that it can be wrapped
around an exis... | 1311.7000v1 |
2013-12-02 | The spatial distribution of dark-matter-annihilation originated gamma-ray line signal | The GeV$-$TeV $\gamma-$ray line signal is the smoking gun signature of the
dark matter annihilation or decay. The detection of such a signal is one of the
main targets of some space-based telescopes, including Fermi-LAT and the
upcoming CALET, DAMPE and Gamma-400. An important feature of the
dark-matter-annihilation or... | 1312.0357v2 |
2013-12-03 | Inflationary Steps in the Planck Data | We extend and improve the modeling and analysis of large-amplitude, sharp
inflationary steps for second order corrections required by the precision of
the Planck CMB power spectrum and for arbitrary Dirac-Born-Infeld sound speed.
With two parameters, the amplitude and frequency of the resulting oscillations,
step model... | 1312.0946v1 |
2013-12-16 | Exploiting Intrinsic Triangular Geometry in Relativistic He3+Au Collisions to Disentangle Medium Properties | Recent results in d+Au and p+Pb collisions at RHIC and the LHC provide
evidence for collective expansion and flow of the created medium. We propose a
control set of experiments to directly compare particle emission patterns from
p+Au, d+Au, and He3+Au or t+Au collisions at the same sqrt(sNN). Using Monte
Carlo Glauber ... | 1312.4565v2 |
2013-12-17 | Reversal time of the magnetization of magnetic nanoparticles at very low damping | The magnetization reversal time of ferromagnetic nanoparticles is
investigated in the very low damping regime. The energy-controlled diffusion
equation rooted in a generalization of the Kramers escape rate theory for point
Brownian particles in a potential to the magnetic relaxation of a macrospin,
yields the reversal ... | 1312.4904v3 |
2013-12-18 | Quantum speed limit for arbitrary initial states | We investigate the generic bound on the minimal evolution time of the open
dynamical quantum system. This quantum speed limit time is applicable to both
mixed and pure initial states. We then apply this result to the damped
Jaynes-Cummings model and the Ohimc-like dephasing model starting from a
general time-evolution ... | 1312.5071v1 |
2013-12-26 | Equilibrium of a Brownian particle in an inhomogeneous medium: An alternative approach | We look at the equilibrium of a Brownian particle in an inhomogeneous space
following the alternative approach proposed in ref.[1]. We consider a
coordinate dependent damping that makes the stochastic dynamics the one with
multiplicative noise. Here we show that the mapping to an additive noise gives
the equilibrium di... | 1312.7075v3 |
2014-01-22 | On Stability of Hyperbolic Thermoelastic Reissner-Mindlin-Timoshenko Plates | In the present article, we consider a thermoelastic plate of
Reissner-Mindlin-Timoshenko type with the hyperbolic heat conduction arising
from Cattaneo's law. In the absense of any additional mechanical dissipations,
the system is often not even strongly stable unless restricted to the
rotationally symmetric case, etc.... | 1401.5669v1 |
2014-01-27 | Edge states in 2D lattices with hopping anisotropy and Chebyshev polynomials | Analytic technique based on Chebyshev polynomials is developed for studying
two-dimensional lattice ribbons with hopping anisotropy. In particular, the
tight-binding models on square and triangle lattice ribbons are investigated
with anisotropic nearest neighbouring hoppings. For special values of hopping
parameters th... | 1401.6770v2 |
2014-01-27 | Dynamical pattern formations in two dimensional fluid and Landau pole bifurcation | A phenomenological theory is proposed to analyze the asymptotic dynamics of
perturbed inviscid Kolmogorov shear flows in two dimensions. The phase diagram
provided by the theory is in qualitative agreement with numerical observations,
which include three phases depending on the aspect ratio of the domain and the
size o... | 1401.6865v1 |
2014-02-05 | On Linear Landau Damping for Relativistic Plasmas via Gevrey Regularity | We examine the phenomenon of Landau Damping in relativistic plasmas via a
study of the relativistic Vlasov-Poisson system (both on the torus and on
$\mathbb{R}^3$) linearized around a sufficiently nice, spatially uniform
kinetic equilibrium. We find that exponential decay of spatial Fourier modes is
impossible under mo... | 1402.0992v2 |
2014-02-06 | Time dependent elastic response to a local shear transformation in amorphous solids | The elastic response of a two-dimensional amorphous solid to induced local
shear transformations, which mimic the elementary plastic events occurring in
deformed glasses, is investigated via Molecular Dynamics simulations. We show
that for different spatial realizations of the transformation, despite relative
fluctuati... | 1402.1474v1 |
2014-02-07 | A temperature dependent formation time approach for Υsuppression at LHC | We present here a model to describe the bottomonium suppression in Pb$+$Pb
collisions at Large Hadron Collider (LHC), at $\sqrt{s_{NN}}=2.76$ TeV by using
the quasi-particle model (QPM) equation of state (EOS) for the Quark-Gluon
Plasma (QGP) expanding under Bjorken's hydrodynamical expansion. The current
model include... | 1402.1560v5 |
2014-02-12 | A numerical comparison between degenerate parabolic and quasilinear hyperbolic models of cell movements under chemotaxis | We consider two models which were both designed to describe the movement of
eukaryotic cells responding to chemical signals. Besides a common standard
parabolic equation for the diffusion of a chemoattractant, like chemokines or
growth factors, the two models differ for the equations describing the movement
of cells. T... | 1402.2831v2 |
2014-02-13 | Surface Activity and Oscillation Amplitudes of Red Giants in Eclipsing Binaries | Among 19 red-giant stars belonging to eclipsing binary systems that have been
identified in Kepler data, 15 display solar-like oscillations. We study whether
the absence of mode detection in the remaining 4 is an observational bias or
possibly evidence of mode damping that originates from tidal interactions. A
careful ... | 1402.3027v1 |
2014-02-18 | Cherenkov friction on a neutral particle moving parallel to a dielectric | Based on a fully relativistic framework and the assumption of local
equilibrium, we describe a simple mechanism of quantum friction for a particle
moving parallel to a dielectric. The Cherenkov effect explains how the bare
ground state becomes globally unstable and how fluctuations of the
electromagnetic field and the ... | 1402.4518v1 |
2014-02-20 | Feed-forward control for quantum state protection against decoherence | We propose a novel scheme of feed-forward control and its reversal for
protecting quantum state against decoherence. Before the noise channel our
pre-weak measurement and feed-forward are just to change the protected state
into the state almost immune to the noise channel, and after the channel our
reversed operations ... | 1402.4921v2 |
2014-02-25 | Elastic Anomalies Associated with the Antiferroelectric Phase Transitions of PbHfO3 Single Crystals | The temperature dependence of the elastic properties of antiferroelectric
PbHfO3 was investigated by Brillouin scattering. The two structural phase
transitions of antiferroelectric-antiferroelectric-paraelectric phases were
clearly identified by discontinuous changes in the acoustic mode frequencies
and the hypersonic ... | 1402.6175v1 |
2014-03-05 | Short-period pulsar oscillations following a glitch | Following a glitch, the crust and magnetized plasma in the outer core of a
neutron star are believed to rapidly establish a state of co-rotation within a
few seconds by process analogous to classical Ekman pumping. However, in ideal
magnetohydrodynamics, a final state of co-rotation is inconsistent with
conservation of... | 1403.1046v2 |
2014-03-06 | On the damped oscillations of an elastic quasi-circular membrane in a two-dimensional incompressible fluid | We propose a procedure - partly analytical and partly numerical - to find the
frequency and the damping rate of the small-amplitude oscillations of a
massless elastic capsule immersed in a two-dimensional viscous incompressible
fluid. The unsteady Stokes equations for the stream function are decomposed
onto normal mode... | 1403.1423v1 |
2014-03-07 | The silicon matrix for the prototype for the Dark Matter Particle Explorer | A new generation detector for the high energy cosmic ray - the DAMPE(DArk
Matter Particle Explorer) is a satellite based project. Its main object is the
measurement of energy spectrum of cosmic ray nuclei from 100GeV to 100TeV, the
high energy electrons and gamma ray from 5GeV to 10TeV. A silicon matrix
detector descri... | 1403.1679v2 |
2014-04-01 | Anomalies in the specific heat of a free damped particle: The role of the cutoff in the spectral density of the coupling | The properties of a dissipative system depend on the spectral density of the
coupling to the environment. Mostly, the dependence on the low-frequency
behavior is in the focus of interest. However, in order to avoid divergencies,
it is also necessary to suppress the spectral density of the coupling at high
frequencies. ... | 1404.0254v1 |
2014-04-09 | Directly imaging damped Ly-alpha galaxies at z>2. II: Imaging and spectroscopic observations of 32 quasar fields | Damped Ly-alpha absorbers (DLAs) are a well-studied class of absorption line
systems, and yet the properties of their host galaxies remain largely unknown.
To investigate the origin of these systems, we have conducted an imaging survey
of 32 quasar fields with intervening DLAs between z~1.9-3.8, leveraging a
technique ... | 1404.2599v2 |
2014-04-13 | Homotopy invariants methods in the global dynamics of strongly damped wave equation | We are interested in the following differential equation $\ddot u(t) = -A
u(t) - c A \dot u(t) + \lambda u(t) + F(u(t))$ where $c > 0$ is a damping
factor, $A$ is a sectorial operator and $F$ is a continuous map. We consider
the situation where the equation is at resonance at infinity, which means that
$\lambda$ is an ... | 1404.3429v3 |
2014-04-14 | Low-distance Surface Codes under Realistic Quantum Noise | We study the performance of distance-three surface code layouts under
realistic multi-parameter noise models. We first calculate their thresholds
under depolarizing noise. We then compare a Pauli-twirl approximation of
amplitude and phase damping to amplitude and phase damping. We find the
approximate channel results i... | 1404.3747v3 |
2014-04-21 | Phase conversion dissipation in multicomponent compact stars | We propose a mechanism for the damping of density oscillations in
multicomponent compact stars. The mechanism is the periodic conversion between
different phases, i.e., the movement of the interface between them, induced by
pressure oscillations in the star. The damping grows nonlinearly with the
amplitude of the oscil... | 1404.5279v4 |
2014-04-25 | Nonlinear and Linear Timescales near Kinetic Scales in Solar Wind Turbulence | The application of linear kinetic treatments to plasma waves, damping, and
instability requires favorable inequalities between the associated linear
timescales and timescales for nonlinear (e.g., turbulence) evolution. In the
solar wind these two types of timescales may be directly compared using
standard Kolmogorov-st... | 1404.6569v1 |
2014-04-29 | Quasi-normal modes of superfluid neutron stars | We study non-radial oscillations of neutron stars with superfluid baryons, in
a general relativistic framework, including finite temperature effects. Using a
perturbative approach, we derive the equations describing stellar oscillations,
which we solve by numerical integration, employing different models of nucleon
sup... | 1404.7512v1 |
2014-05-27 | Nonequilibrium dynamical mean-field theory for bosonic lattice models | We develop the nonequilibrium extension of bosonic dynamical mean field
theory (BDMFT) and a Nambu real-time strong-coupling perturbative impurity
solver. In contrast to Gutzwiller mean-field theory and strong coupling
perturbative approaches, nonequilibrium BDMFT captures not only dynamical
transitions, but also dampi... | 1405.6941v2 |
2014-05-28 | Electronic control of the spin-wave damping in a magnetic insulator | It is demonstrated that the decay time of spin-wave modes existing in a
magnetic insulator can be reduced or enhanced by injecting an in-plane dc
current, $I_\text{dc}$, in an adjacent normal metal with strong spin-orbit
interaction. The demonstration rests upon the measurement of the ferromagnetic
resonance linewidth ... | 1405.7415v1 |
2014-06-16 | Study on FPGA SEU Mitigation for Readout Electronics of DAMPE BGO Calorimeter | The BGO calorimeter, which provides a wide measurement range of the primary
cosmic ray spectrum, is a key sub-detector of Dark Matter Particle Explorer
(DAMPE). The readout electronics of calorimeter consists of 16 pieces of Actel
ProASIC Plus FLASH-based FPGA, of which the design-level flip-flops and
embedded block RA... | 1406.3928v1 |
2014-06-18 | Damping of glacial-interglacial cycles from anthropogenic forcing | Climate variability over the past million years shows a strong
glacial-interglacial cycle of ~100,000 years as a combined result of
Milankovitch orbital forcing and climatic resonance. It has been suggested that
anthropogenic contributions to radiative forcing may extend the length of the
present interglacial, but the ... | 1406.4728v1 |
2014-06-27 | Magnetoplasmons of the tilted-anisotropic Dirac cone material $α-$(BEDT-TTF)$_2$I$_3$ | We study the collective modes of a low-energy continuum model of the
quasi-two-dimensional electron liquid in a layer of the organic compound
$\alpha-$(BEDT-TTF)$_2$I$_3$ in a perpendicular magnetic field. As testified by
zero magnetic field transport experiments and \textit{ab initio} theory, this
material hosts both ... | 1406.7081v2 |
2014-06-30 | Collective Coordinates Theory for Discrete Soliton Ratchets in the sine-Gordon Model | A collective coordinate theory is develop for soliton ratchets in the damped
discrete sine-Gordon model driven by a biharmonic force. An ansatz with two
collective coordinates, namely the center and the width of the soliton, is
assumed as an approximated solution of the discrete non-linear equation. The
evolution of th... | 1406.7656v1 |
2014-07-04 | Temperature Dependent Ferromagnetic Resonance via the Landau-Lifshitz-Bloch Equation: Application to FePt | Using the Landau-Lifshitz-Bloch (LLB) equation for ferromagnetic materials,
we derive analytic expressions for temperature dependent absorption spectra as
probed by ferromagnetic resonance (FMR). By analysing the resulting
expressions, we can predict the variation of the resonance frequency and
damping with temperature... | 1407.1174v1 |
2014-07-07 | Composition variation and underdamped mechanics near membrane proteins and coats | We study the effect of membrane proteins on the shape, composition and
thermodynamic stability of the surrounding membrane. When the coupling between
membrane composition and curvature is strong enough the nearby composition and
shape both undergo a transition from over-damped to under-damped spatial
variation, well be... | 1407.1672v2 |
2014-07-11 | Evidence for Wave Heating of the Quiet Sun Corona | We have measured the energy and dissipation of Alfvenic waves in the quiet
Sun. A magnetic field was used to infer the location and orientation of the
magnetic field lines along which the waves are expected to travel. The waves
were measured using spectral lines to infer the wave amplitude. The waves cause
a non-therma... | 1407.3250v1 |
2014-07-16 | Nonresonant high frequency excitation of mechanical vibrations in graphene based nanoresonator | We theoretically analyse the dynamics of a suspended graphene membrane which
is in tunnel contact with grounded metallic electrodes and subjected to
ac-electrostatic potential induced by a gate electrode. It is shown that for
such system the retardation effects in the electronic subsystem generate an
effective pumping ... | 1407.4278v2 |
2014-07-21 | Non-Markovian dynamics of open quantum systems without rotating wave approximation | We study the non-Markovian dynamics of a damped oscillator coupled with a
reservoir. We present exact formulas for the oscillator's evolution directly
from the BCH formula by series expansion with neither Markovian nor rotating
wave approximation (RWA). Based on these, we show the existence of the
non-Markovian feature... | 1407.5359v2 |
2014-07-23 | Global Existence of Smooth Solutions and Convergence to Barenblatt Solutions for the Physical Vacuum Free Boundary Problem of Compressible Euler Equations with Damping | For the physical vacuum free boundary problem with the sound speed being
$C^{{1}/{2}}$-H$\ddot{\rm o}$lder continuous near vacuum boundaries of the
one-dimensional compressible Euler equations with damping, the global existence
of the smooth solution is proved, which is shown to converge to the Barenblatt
self-similar ... | 1407.6111v2 |
2014-07-24 | Decay of dark and bright plasmonic modes in a metallic nanoparticle dimer | We develop a general quantum theory of the coupled plasmonic modes resulting
from the near-field interaction between localized surface plasmons in a
heterogeneous metallic nanoparticle dimer. In particular, we provide analytical
expressions for the frequencies and decay rates of the bright and dark
plasmonic modes. We ... | 1407.6569v2 |
2014-07-29 | Reproducing the Kinematics of Damped Lyman-alpha Systems | We examine the kinematic structure of Damped Lyman-alpha Systems (DLAs) in a
series of cosmological hydrodynamic simulations using the AREPO code. We are
able to match the distribution of velocity widths of associated low ionisation
metal absorbers substantially better than earlier work. Our simulations produce
a popul... | 1407.7858v2 |
2014-07-31 | Plasmons in finite spherical ionic systems | The challenging question on possible plasmon type excitations in finite ionic
systems is discussed. The related theoretical model is formulated and developed
in order to describe surface and volume plasmons of ion liquid in finite
electrolyte systems. The irradiation of ionic surface plasmon fluctuations is
studied in ... | 1407.8369v2 |
2014-08-04 | Collective Dynamics of Interacting Particles in Unsteady Flows | We use the Fokker-Planck equation and its moment equations to study the
collective behavior of interacting particles in unsteady one-dimensional flows.
Particles interact according to a long-range attractive and a short-range
repulsive potential field known as Morse potential. We assume Stokesian drag
force between par... | 1408.0558v1 |
2014-08-13 | Correlated decay of triplet excitations in the Shastry-Sutherland compound SrCu$_2$(BO$_3$)$_2$ | The temperature dependence of the gapped triplet excitations (triplons) in
the 2D Shastry-Sutherland quantum magnet SrCu$_2$(BO$_3$)$_2$ is studied by
means of inelastic neutron scattering. The excitation amplitude rapidly
decreases as a function of temperature while the integrated spectral weight can
be explained by a... | 1408.3135v1 |
2014-08-20 | Enhanced dissipation and inviscid damping in the inviscid limit of the Navier-Stokes equations near the 2D Couette flow | In this work we study the long time, inviscid limit of the 2D Navier-Stokes
equations near the periodic Couette flow, and in particular, we confirm at the
nonlinear level the qualitative behavior predicted by Kelvin's 1887 linear
analysis. At high Reynolds number Re, we prove that the solution behaves
qualitatively lik... | 1408.4754v1 |
2014-08-20 | Building accurate initial models using gain functions for waveform inversion in the Laplace domain | We suggest an initial model building technique using time gain functions in
the Laplace domain. Applying the gain expressed as a power of time is
equivalent to taking the partial derivative of the Laplace-domain wavefield
with respect to a damping constant. We construct an objective function, which
minimizes the logari... | 1408.5872v1 |
2014-09-01 | Dynamical symmetries and crossovers in a three-spin system with collective dissipation | We consider the non-equilibrium dynamics of a simple system consisting of
interacting spin-$1/2$ particles subjected to a collective damping. The model
is close to situations that can be engineered in hybrid electro/opto-mechanical
settings. Making use of large-deviation theory, we find a Gallavotti-Cohen
symmetry in t... | 1409.0422v2 |
2014-09-01 | Damping of Bloch oscillations: Variational solutions of the Boltzmann equation beyond linear response | Variational solutions of the Boltzmann equation usually rely on the concept
of linear response. We extend the variational approach for tight-binding models
at high entropies to a regime far beyond linear response. We analyze both
weakly interacting fermions and incoherent bosons on a lattice. We consider a
case where t... | 1409.0560v2 |
2014-09-02 | Controlled bidirectional remote state preparation in noisy environment: A generalized view | It is shown that a realistic, controlled bidirectional remote state
preparation is possible using a large class of entangled quantum states having
a particular structure. Existing protocols of probabilistic, deterministic and
joint remote state preparation are generalized to obtain the corresponding
protocols of contro... | 1409.0833v1 |
2014-09-07 | The Effects of Long Pulse Durations and Radiation Damping in Selective Inversion Recovery Experiments | Long pulse durations necessary in selective inversion recovery (SIR)
experiments along with radiation damping (RD) introduce difficulties in
quantitative nuclear magnetic resonance measurements, such as those that allow
for the determination of a sample's characteristics, including the rates that
govern magnetization t... | 1409.2136v2 |
2014-09-19 | Angular dependence of spin-orbit spin transfer torques | In ferromagnet/heavy metal bilayers, an in-plane current gives rise to
spin-orbit spin transfer torque which is usually decomposed into field-like and
damping-like torques. For two-dimensional free-electron and tight-binding
models with Rashba spin-orbit coupling, the field-like torque acquires
nontrivial dependence on... | 1409.5600v1 |
2014-10-01 | Non-linear collisionless damping of Weibel turbulence in relativistic blast waves | The Weibel/filamentation instability is known to play a key role in the
physics of weakly magnetized collisionless shock waves. From the point of view
of high energy astrophysics, this instability also plays a crucial role because
its development in the shock precursor populates the downstream with a
small-scale magnet... | 1410.0146v1 |
2014-10-10 | The Fate of Scattered Planets | As gas giant planets evolve, they may scatter other planets far from their
original orbits to produce hot Jupiters or rogue planets that are not
gravitationally bound to any star. Here, we consider planets cast out to large
orbital distances on eccentric, bound orbits through a gaseous disk. With
simple numerical model... | 1410.2816v1 |
2014-10-13 | Unified Theory of Inertial Granular Flows and Non-Brownian Suspensions | Rheological properties of dense flows of hard particles are singular as one
approaches the jamming threshold where flow ceases, both for aerial granular
flows dominated by inertia, and for over-damped suspensions. Concomitantly, the
lengthscale characterizing velocity correlations appears to diverge at jamming.
Here we... | 1410.3535v3 |
2014-10-22 | Landau damping in the Kuramoto model | We consider the Kuramoto model of globally coupled phase oscillators in its
continuum limit, with individual frequencies drawn from a distribution with
density of class $C^n$ ($n\geq 4$). A criterion for linear stability of the
uniform stationary state is established which, for basic examples of frequency
distributions... | 1410.6006v1 |
2014-10-30 | Global Solutions to the Gas-Vacuum Interface Problem of Isentropic Compressible Inviscid Flows with Damping in Spherically Symmetric Motions and Physical Vacuum | For the physical vacuum free boundary problem with the sound speed being
$C^{{1}/{2}}$-H$\ddot{\rm o}$lder continuous near vacuum boundaries of the
three-dimensional compressible Euler equations with damping, the global
existence of spherically symmetric smooth solutions is proved, which are shown
to converge to Barenb... | 1410.8471v1 |
2014-11-03 | Monami as an oscillatory hydrodynamic instability in a submerged sea grass bed | The onset of monami ~-- the synchronous waving of sea grass beds driven by a
steady flow -- is modeled as a linear instability of the flow. Unlike previous
works, our model considers the drag exerted by the grass in establishing the
steady flow profile, and in damping out perturbations to it. We find two
distinct modes... | 1411.0365v2 |
2014-11-12 | Dependence of the Efficiency of Spin Hall Torque on the Transparency of Pt-Ferromagnetic Layer Interfaces | We report that spin current transport across Pt-ferromagnet (FM) interfaces
is strongly dependent on the type and the thickness of the FM layer and on
post-deposition processing protocols. By employing both harmonic voltage
measurements and spin-torque ferromagnetic resonance measurements, we find that
the efficiency o... | 1411.3379v1 |
2014-11-13 | Transverse dynamical magnetic susceptibilities from regular static density functional theory: Evaluation of damping and g-shifts of spin-excitations | The dynamical transverse magnetic Kohn-Sham susceptibility calculated within
time-dependent density functional theory shows a fairly linear behavior for a
finite energy window. This observation is used to propose a scheme where the
computation of this quantity is greatly simplified. Regular simulations based
on static ... | 1411.3630v1 |
2014-11-17 | Decoherence Effects on the Non-locality of Symmetric States | The observation of the non-local properties of multipartite entangled states
is of great importance for quantum information protocols. Such properties,
however, are fragile and may not be observed in the presence of decoherence
exhibited by practical physical systems. In this work, we investigate the
robustness of the ... | 1411.4489v1 |
2014-11-22 | Quantification of the spin-Hall anti-damping torque with a resonance spectrometer | We present a simple technique using a cavity-based resonance spectrometer to
quantify the anti-damping torque due to the spin Hall effect. Modification of
ferromagnetic resonance is observed as a function of small DC current in
sub-mm-wide strips of bilayers, consisting of magnetically soft FeGaB and
strong spin-Hall m... | 1411.6166v1 |
2014-11-28 | Quantifying entanglement of a two-qubit system via measurable and invariant moments of its partially transposed density matrix | We describe a direct method to determine the negativity of an arbitrary
two-qubit state in experiments. The method is derived by analyzing the relation
between the purity, negativity, and a universal entanglement witness for
two-qubit entanglement. We show how the negativity of a two-qubit state can be
calculated from ... | 1411.7977v2 |
2014-12-05 | Adaptive Damping and Mean Removal for the Generalized Approximate Message Passing Algorithm | The generalized approximate message passing (GAMP) algorithm is an efficient
method of MAP or approximate-MMSE estimation of $x$ observed from a noisy
version of the transform coefficients $z = Ax$. In fact, for large zero-mean
i.i.d sub-Gaussian $A$, GAMP is characterized by a state evolution whose fixed
points, when ... | 1412.2005v1 |
2014-12-14 | An adaptive selective frequency damping method | The selective frequency damping (SFD) method is an alternative to classical
Newton's method to obtain unstable steady-state solutions of dynamical systems.
However this method has two main limitations: it does not converge for
arbitrary control parameters; and when it does converge, the time necessary to
reach the stea... | 1412.4372v1 |
2014-12-23 | Photoacoustic elastic oscillation and characterization | Photoacoustic imaging and sensing have been studied extensively to probe the
optical absorption of biological tissue in multiple scales ranging from large
organs to small molecules. However, its elastic oscillation characterization is
rarely studied and has been an untapped area to be explored. In literature,
photoacou... | 1412.7284v1 |
2015-01-08 | Landau Damping of Geodesic Acoustic Mode in Toroidally Rotating Tokamaks | Geodesic acoustic mode (GAM) is analyzed by using modified gyro-kinetic (MGK)
equation applicable to low-frequency microinstabilities in a rotating
axisymmetric plasma. Dispersion relation of GAM in the presence of arbitrary
Mach number is analytically derived. Toroidal rotation plays the same effects
on the GAM regard... | 1501.01750v2 |
2015-01-17 | Applications of quantum cryptographic switch: Various tasks related to controlled quantum communication can be performed using Bell states and permutation of particles | Recently, several aspects of controlled quantum communication (e.g.,
bidirectional controlled state teleportation, controlled quantum secure direct
communication, controlled quantum dialogue, etc.) have been studied using
$n$-qubit ($n\geq3$) entanglement. Specially, a large number of schemes for
bidirectional controll... | 1501.04187v1 |
2015-02-06 | pQCD approach to Charmonium regeneration in QGP at the LHC | We analyze the applicability of perturbative QCD (pQCD) approach to the issue
of $J/\psi$ recombination at the Large Hadron Collider (LHC), and calculate the
recombination cross section for $c\bar{c}$ recombination to form $J/\psi$ as a
function of temperature. The charmonium wavefunction is obtained by employing a
tem... | 1502.01790v2 |
2015-02-06 | Biological control via "ecological" damping: An approach that attenuates non-target effects | In this work we develop and analyze a mathematical model of biological
control to prevent or attenuate the explosive increase of an invasive species
population in a three-species food chain. We allow for finite time blow-up in
the model as a mathematical construct to mimic the explosive increase in
population, enabling... | 1502.02010v1 |
2015-02-11 | On the mass determination in liquid utilizing measurement of only the fundamental flexural resonances of the micro-/nanomechanical based mass sensors | Micro-/nanomechanical mass sensors are capable to quantitatively determine
molecule mass from only first three (two) measured cantilever (bridge) resonant
frequencies. However, in liquid solutions that are relevant to most of the
biological systems, the mass determination is challenging because the Q-factor
due to flui... | 1502.03232v1 |
2015-02-13 | A Dynamical Model of Plasma Turbulence in the Solar Wind | A dynamical approach, rather than the usual statistical approach, is taken to
explore the physical mechanisms underlying the nonlinear transfer of energy,
the damping of the turbulent fluctuations, and the development of coherent
structures in kinetic plasma turbulence. It is argued that the linear and
nonlinear dynami... | 1502.04109v1 |
2015-03-19 | Vertical Oscillations of Fluid and Stellar Disks | A satellite galaxy or dark matter subhalo that passes through a stellar disk
may excite coherent oscillations in the disk perpendicular to its plane. We
determine the properties of these modes for various self-gravitating plane
symmetric systems (Spitzer sheets) using the matrix method of Kalnajs. In
particular, we fin... | 1503.05741v1 |
2015-03-24 | Linearized nonequilibrium dynamics in nonconformal plasma | We investigate the behaviour of the lowest nonhydrodynamic modes in a class
of holographic models which exhibit an equation of state closely mimicking the
one determined from lattice QCD. We calculate the lowest quasinormal mode
frequencies for a range of scalar self-interaction potentials and find that the
damping of ... | 1503.07149v1 |
2015-03-25 | The Conversion of CESR to Operate as the Test Accelerator, CesrTA, Part 1: Overview | Cornell's electron/positron storage ring (CESR) was modified over a series of
accelerator shutdowns beginning in May 2008, which substantially improves its
capability for research and development for particle accelerators. CESR's
energy span from 1.8 to 5.6 GeV with both electrons and positrons makes it
ideal for the s... | 1503.07451v2 |
2015-04-10 | Fission barrier, damping of shell correction and neutron emission in the fission of A$\sim$200 | Decay of $^{210}$Po compound nucleus formed in light and heavy-ion induced
fusion reactions has been analyzed simultaneously using a consistent
prescription for fission barrier and nuclear level density incorporating shell
correction and its damping with excitation energy. Good description of all the
excitation functio... | 1504.02599v1 |
2015-04-10 | Enhancement of the Anti-Damping Spin Torque Efficacy of Platinum by Interface Modification | We report a strong enhancement of the efficacy of the spin Hall effect (SHE)
of Pt for exerting anti-damping spin torque on an adjacent ferromagnetic layer
by the insertion of $\approx$ 0.5 nm layer of Hf between a Pt film and a thin,
< 2 nm, Fe$_{60}$Co$_{20}$B$_{20}$ ferromagnetic layer. This enhancement is
quantifie... | 1504.02806v1 |
2015-04-21 | Effect of assortative mixing in the second-order Kuramoto model | In this paper we analyze the second-order Kuramoto model presenting a
positive correlation between the heterogeneity of the connections and the
natural frequencies in scale-free networks. We numerically show that
discontinuous transitions emerge not just in disassortative but also in
assortative networks, in contrast w... | 1504.05447v1 |
2015-04-27 | Controlled merging and annihilation of localized dissipative structures in an AC-driven damped nonlinear Schrödinger system | We report studies of controlled interactions of localized dissipative
structures in a system described by the AC-driven damped nonlinear
Schr\"odinger equation. Extensive numerical simulations reveal a diversity of
interaction scenarios that are governed by the properties of the system driver.
In our experiments, perfo... | 1504.07231v1 |
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