publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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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 |
2019-07-08 | Single-spectrum prediction of kurtosis of water waves in a non-conservative model | We study statistical properties after a sudden episode of wind for water
waves propagating in one direction. A wave with random initial conditions is
propagated using a forced-damped higher order Nonlinear Schr\"odinger equation
(NLS). During the wind episode, the wave action increases, the spectrum
broadens, the spect... | 1907.03490v1 |
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 |
2019-08-29 | Enhancement of ultrafast demagnetization rate and Gilbert damping driven by femtosecond laser-induced spin currents in Fe81Ga19/Ir20Mn80 bilayers | In spintronics applications, ultrafast spin dynamics have to be controlled at
femtosecond (fs) timescales via fs-laser radiation. At such ultrafast
timescales, the effect of the Gilbert damping factor {\alpha} on ultrafast
demagnetization time should be considered. In previous explorations for the
relationship between ... | 1908.11084v1 |
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 |
2020-08-03 | Improvement on the blow-up of the wave equation with the scale-invariant damping and combined nonlinearities | We consider in this article the damped wave equation, in the
\textit{scale-invariant case} with combined two nonlinearities, which reads as
follows: \begin{displaymath} \d (E) \hspace{1cm} u_{tt}-\Delta
u+\frac{\mu}{1+t}u_t=|u_t|^p+|u|^q, \quad \mbox{in}\ \R^N\times[0,\infty),
\end{displaymath} with small initial data.... | 2008.02109v3 |
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 |
2020-12-04 | 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 |
2021-01-22 | Measurements and analysis of response function of cold atoms in optical molasses | We report our experimental measurements and theoretical analysis of the
position response function of a cloud of cold atoms residing in the viscous
medium of an optical molasses and confined by a magneto-optical trap (MOT). We
measure the position response function by applying a transient homogeneous
magnetic field as ... | 2101.09118v2 |
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 |
2021-03-29 | Nonequilibrium Dynamics of the Chiral Quark Condensate under a Strong Magnetic Field | Strong magnetic fields impact quantum-chromodynamics (QCD) properties in
several situations; examples include the early universe, magnetars, and
heavy-ion collisions. These examples share a common trait: time evolution. A
prominent QCD property impacted by a strong magnetic field is the quark
condensate, an approximate... | 2103.15665v1 |
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 |
2021-06-16 | Spin-Torque-driven Terahertz Auto Oscillations in Non-Collinear Coplanar Antiferromagnets | We theoretically and numerically study the terahertz auto oscillations in
thin-film metallic non-collinear coplanar antiferromagnets (AFMs), such as
$\mathrm{Mn_{3}Sn}$ and $\mathrm{Mn_{3}Ir}$, under the effect of anti-damping
spin-torque with spin polarization perpendicular to the plane of the film. To
obtain the orde... | 2106.08528v2 |
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 |
2021-07-17 | Theoretical and numerical study of vibrational resonance in a damped softening Duffing oscillator | We study the possibility of occurrence of vibrational resonance in a
softening Duffing oscillator in the underdamped and overdamped cases both
theoretically as well as numerically. The oscillator is driven by two periodic
forces. Numerically we find that in the underdamped case two oscillatory
solutions are obtained in... | 2107.08302v1 |
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 |
2021-07-31 | 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 |
2022-03-15 | Search for gamma-ray line signals around the black hole at the galactic center with DAMPE observation | The adiabatic growth of a black hole (BH) may enhance the dark matter (DM)
density surrounding it, causing a spike in the DM density profile. The spike
around the supermassive BH at the center of the Milky Way may lead to a
dramatic enhancement of the gamma-ray flux of DM annihilation from the galactic
center (GC). In ... | 2203.08078v1 |
2022-03-15 | Optimal Damping with Hierarchical Adaptive Quadrature for Efficient Fourier Pricing of Multi-Asset Options in Lévy Models | Efficiently pricing multi-asset options is a challenging problem in
quantitative finance. When the characteristic function is available,
Fourier-based methods are competitive compared to alternative techniques
because the integrand in the frequency space often has a higher regularity than
that in the physical space. Ho... | 2203.08196v4 |
2022-03-25 | Nonlinear damped spatially periodic breathers and the emergence of soliton-like rogue waves | The spatially periodic breather solutions (SPBs) of the nonlinear
Schr\"odinger equation, prominent in modeling rogue waves, are unstable. In
this paper we numerically investigate the effects of nonlinear dissipation and
higher order nonlinearities on the routes to stability of the SPBs in the
framework of the nonlinea... | 2203.13488v2 |
2022-03-25 | Investigating the effect of noise channels on the quality of unitary t-designs | Unitary t-designs have a wide variety of applications in quantum information
theory, such as quantum data encryption and randomised benchmarking. However,
experimental realisations of t-designs are subject to noise. Here we
investigate the effect of noise channels on the quality of single-qubit
t-designs. The noise cha... | 2203.13771v2 |
2022-04-25 | Geometrical aspects of contact mechanical systems and field theories | Many important theories in modern physics can be stated using differential
geometry. Symplectic geometry is the natural framework to deal with autonomous
Hamiltonian mechanics. This admits several generalizations for nonautonomous
systems, both regular and singular. Some of these extensions are the subject of
this thes... | 2204.11537v1 |
2022-06-20 | Swinging a playground swing: torque controls for inducing sustained oscillations | Models of a playground swing have been studied since the 1960s. However, in
most of them, the position of the swinger is controlled directly. This
simplifies the problem but hides the mechanics of torques applied to keep the
swing moving in a regular pattern. This article studies these mechanics. Two
models of a swing ... | 2206.09579v1 |
2022-07-01 | Frequency beating and damping of breathing oscillations of a harmonically trapped one-dimensional quasicondensate | We study the breathing (monopole) oscillations and their damping in a
harmonically trapped one-dimensional (1D) Bose gas in the quasicondensate
regime using a finite-temperature classical field approach. By characterising
the oscillations via the dynamics of the density profile's rms width over long
time, we find that ... | 2207.00209v2 |
2022-07-29 | Coordinated control in multi-terminal VSC-HVDC systems to improve transient stability: Impact on electromechanical-oscillation damping | Multi-terminal high-voltage Direct Current technology based on Voltage-Source
Converter stations (VSC-MTDC) is expected to be one of the most important
contributors to the future of electric power systems. In fact, among other
features, it has already been shown how this technology can contribute to
improve transient s... | 2208.00083v1 |
2022-08-04 | Thermoelastic Damping in MEMS Gyroscopes at High Frequencies | Microelectromechanical systems (MEMS) gyroscopes are widely used, e.g. in
modern automotive and consumer applications, and require signal stability and
accuracy in rather harsh environmental conditions. In many use cases, device
reliability must be guaranteed under large external loads at high frequencies.
The sensitiv... | 2208.02591v2 |
2022-08-02 | Motion of a parametrically driven damped coplanar double pendulum | We present the results of linear stability of a damped coplanar double
pendulum and its non-linear motion, when the point of suspension is vibrated
sinusoidally in the vertical direction with amplitude $a$ and frequency $\omega
$. A double pendulum has two pairs of Floquet multipliers, which have been
calculated for va... | 2208.03292v2 |
2022-08-09 | Simultaneous measurements of unstable and stable Alfvén Eigenmodes in JET | In this paper, we report the novel experimental observation of both unstable
and stable Toroidicity-induced Alfv\'en Eigenmodes (TAEs) measured
simultaneously in a JET tokamak plasma. The three-ion-heating scheme
(D-DNBI-3He) is employed to accelerate deuterons to MeV energies, thereby
destabilizing TAEs with toroidal ... | 2208.05052v1 |
2022-09-24 | Deep Attentive Belief Propagation: Integrating Reasoning and Learning for Solving Constraint Optimization Problems | Belief Propagation (BP) is an important message-passing algorithm for various
reasoning tasks over graphical models, including solving the Constraint
Optimization Problems (COPs). It has been shown that BP can achieve
state-of-the-art performance on various benchmarks by mixing old and new
messages before sending the n... | 2209.12000v1 |
2022-12-01 | Slack-based tunable damping leads to a trade-off between robustness and efficiency in legged locomotion | Animals run robustly in diverse terrain. This locomotion robustness is
puzzling because axon conduction velocity is limited to a few ten meters per
second. If reflex loops deliver sensory information with significant delays,
one would expect a destabilizing effect on sensorimotor control. Hence, an
alternative explanat... | 2212.00475v1 |
2022-12-22 | Spin wave dispersion of ultra-low damping hematite ($α\text{-Fe}_2\text{O}_3$) at GHz frequencies | Low magnetic damping and high group velocity of spin waves (SWs) or magnons
are two crucial parameters for functional magnonic devices. Magnonics research
on signal processing and wave-based computation at GHz frequencies focussed on
the artificial ferrimagnetic garnet Y$_3$Fe$_5$O$_{12}$ (YIG) so far. We report
on spi... | 2212.11887v2 |
2023-01-19 | Magnetoreological spring as element of vibration control system of dynamicly active equipment for biofuel production | The development of vibration protection systems that ensure efficiency and
safety in the operation of process equipment and pipelines is one of the main
tasks of controlling the dynamic state of machines. One of the effective
methods of vibration isolation of the equipment of these installations is the
use of vibration... | 2301.07911v1 |
2023-01-30 | Investigation of Ultrafast Demagnetization and Gilbert Damping and their Correlation in Different Ferromagnetic Thin Films Grown Under Identical Conditions | Following the demonstration of laser-induced ultrafast demagnetization in
ferromagnetic nickel, several theoretical and phenomenological propositions
have sought to uncover its underlying physics. In this work we revisit the
three temperature model (3TM) and the microscopic three temperature model
(M3TM) to perform a c... | 2301.12797v1 |
2023-02-19 | Collective Quantum Approach to Surface Plasmon Resonance Effect | In this research we present a theory of the surface plasmon resonance (SPR)
effect based on the dual length-scale driven damped collective quantum
oscillations of the spill-out electrons in plasmonic material surface. The
metallic electron excitations are modeled using the Hermitian effective
Schr\"{o}dinger-Poisson sy... | 2302.13974v1 |
2023-03-01 | Evolution of the eccentricity and inclination of low-mass planets subjected to thermal forces: a numerical study | By means of three dimensional, high resolution hydrodynamical simulations we
study the orbital evolution of weakly eccentric or inclined low-mass
protoplanets embedded in gaseous discs subject to thermal diffusion. We
consider both non-luminous planets, and planets that also experience the
radiative feedback from their... | 2303.00867v1 |
2023-03-13 | Discriminative sEMG-based features to assess damping ability and interpret activation patterns in lower-limb muscles of ACLR athletes | Objective: The main goal of the athletes who undergo anterior cruciate
ligament reconstruction (ACLR) surgery is a successful return-to-sport. At this
stage, identifying muscular deficits becomes important. Hence, in this study,
three discriminative features based on surface electromyographic signals (sEMG)
acquired in... | 2303.06954v1 |
2023-03-28 | Search for damped oscillating structures from charged pion electromagnetic form factor data | The damped oscillating structures recently revealed by a three parametric
formula from the proton ``effective'' form factor data extracted of the
measured total cross section $\sigma^{bare}_{tot}(e^+e^-\to p\bar p)$ still
seem to have an unknown origin. The conjectures of their direct manifestation
of the quark-gluon s... | 2303.16681v1 |
2023-05-15 | Landau damping and the survival threshold | In this paper, we establish the large time asymptotic behavior of solutions
to the linearized Vlasov-Poisson system near general spatially homogenous
equilibria $\mu(\frac12|v|^2)$ with connected support on the whole space
$\RR^3_x \times \RR^3_v$, including those that are non-monotone. The problem
can be solved comple... | 2305.08672v1 |
2023-06-04 | Large Dynamical Tide Amplitudes from Small Kicks at Pericenter | The effect of dynamical tide ``kicks" on eccentric binary orbits is
considered using the orbital mapping method. It is demonstrated that when mode
damping is negligible the mode amplitude will generically grow in time for all
values of orbital eccentricity and semi-major axis, even for small kicks
outside the regime ex... | 2306.02382v1 |
2023-06-16 | Damping of MHD Turbulence in A Partially Ionized Medium | The coupling state between ions and neutrals in the interstellar medium plays
a key role in the dynamics of magnetohydrodynamic (MHD) turbulence, but is
challenging to study numerically. In this work, we investigate the damping of
MHD turbulence in a partially ionized medium using 3D two-fluid (ions+neutrals)
simulatio... | 2306.10010v2 |
2023-07-24 | BGO quenching effect on spectral measurements of cosmic-ray nuclei in DAMPE experiment | The Dark Matter Particle Explorer (DAMPE) is a satellite-borne detector
designed to measure high energy cosmic-rays and $\gamma$-rays. As a key
sub-detector of DAMPE, the Bismuth Germanium Oxide (BGO) imaging calorimeter is
utilized to measure the particle energy with a high resolution. The nonlinear
fluorescence respo... | 2307.12629v1 |
2023-08-04 | Interplay of space charge, intrabeam scattering and synchrotron radiation in the Compact Linear Collider damping rings | Future ultra-low emittance rings for electron/positron colliders requiring
extremely high beam brightness can be limited by collective effects. In this
paper, the interplay of effects such as synchrotron radiation, intra-beam
scattering (IBS) and space charge in the vicinity of excited betatron
resonances is assessed. ... | 2308.02196v3 |
2023-08-04 | Nonlinear wave damping by Kelvin-Helmholtz instability induced turbulence | Magnetohydrodynamic kink waves naturally form as a consequence of
perturbations to a structured medium, for example transverse oscillations of
coronal loops. Linear theory has provided many insights in the evolution of
linear oscillations, and results from these models are often applied to infer
information about the s... | 2308.02217v2 |
2023-08-10 | JWST observations of galaxy damping wings during reionization interpreted with cosmological simulations | Spectra of the highest redshift galaxies taken with JWST are now allowing us
to see into the heart of the reionization epoch. Many of these observed
galaxies exhibit strong damping wing absorption redward of their Lyman-$\alpha$
emission. These observations have been used to measure the redshift evolution
of the neutra... | 2308.05800v1 |
2023-08-23 | Dynamics of pinned quantized vortices in superfluid $^4$He in a microelectromechanical oscillator | We numerically studied the vortex dynamics at zero temperature in superfluid
$^4$He confined between two parallel rough solid boundaries, one of which
oscillates in a shear mode. This study was motivated by the experimental work
by Barquist $et$ $al.$ which employed a microelectromechanical systems (MEMS)
oscillator op... | 2308.11942v2 |
2023-12-29 | Modeling polyelectrolyte hydration from a multi scale polarizable pseudo particle solvent coarse grained approach | We investigate the reliability of simulations of polyelectrolyte systems in
aqueous environments, simulations that are performed using an efficient multi
scale coarse grained polarizable pseudo-particle particle approach, denoted as
pppl, to model the solvent water, whereas the solutes are modeled using a
polarizable a... | 2312.17580v1 |
2024-02-19 | Global existence for non-homogeneous incompressible inviscid fluids in presence of Ekman pumping | In this paper, we study the global solvability of the density-dependent
incompressible Euler equations, supplemented with a damping term of the form $
\mathfrak{D}_{\alpha}^{\gamma}(\rho, u) = \alpha \rho^{\gamma} u $, where
$\alpha>0$ and $ \gamma \in \{0,1\} $. To some extent, this system can be seen
as a simplified ... | 2402.12592v1 |
2024-02-20 | The Fundamental Parameters of Astrophysical Plasma Turbulence and its Dissipation: Nonrelativistic Limit | A specific set of dimensionless plasma and turbulence parameters is
introduced to characterize the nature of turbulence and its dissipation in
weakly collisional space and astrophysical plasmas. Key considerations are
discussed for the development of predictive models of the turbulent plasma
heating that characterize t... | 2402.12829v1 |
2024-03-06 | Universality of pseudo-Goldstone damping near critical points | Recently, in studies of holographic models and hydrodynamics with spontaneous
breaking of approximate symmetries, it has been proposed that the damping of
pseudo-Goldstone modes at finite temperatures is universally constrained in the
way that $\Omega_{\varphi}/m_{\varphi}^2\simeq D_{\varphi}$ in the broken
phase, wher... | 2403.03503v2 |
1993-11-17 | Early Reionization in Cosmology | The cosmic microwave background (CMB) anisotropies have turned out to
represent one of the most stringent 'bottle necks' for scenarios of large scale
structure formation. As a possibility to relax this constraint, it has been
proposed that early reionization can damp CMB fluctuations on small scales due
to photon diffu... | 9311039v1 |
1994-08-18 | The Damping and Excitation of Galactic Warps by Dynamical Friction | We investigate the dynamical interaction of galactic warps with the
surrounding dark matter halo, using analytic perturbation theory. A precessing
warp induces a density wake in the collisionless dark matter, which acts back
on the original warp, transferring energy and angular momentum between the warp
and halo (dynam... | 9408068v1 |
1995-09-14 | Another Look at Gaussian Isocurvature Hot Dark Matter Models For Large- Scale Structure | We examine Gaussian isocurvature hot dark matter (massive neutrino) models
for large-scale structure in which the initial density perturbations are
produced in the baryons with a power--law spectrum $P_B(k) = Ak^{n_B}$. We
calculate the linearly-evolved power spectrum and cosmic microwave
fluctuations. We find that mod... | 9509075v1 |
1995-12-12 | A radio Search for high redshift HI absorption | Ground based optical observations have yielded considerable information on
the statistics of damped-lyman alpha systems. In particular these systems are
known to be the dominant repository of the observed neutral gas at high
redshift. However, particularly at high redshift, there is the possibility that
optical observa... | 9512069v1 |
1996-01-26 | The chemical evolution of galaxies at high redshift | Observations of absorption lines in the spectra of distant QSOs offer a new
approach for tracking the evolution of normal galaxies from early epochs to the
present day. The damped Ly alpha systems are particularly suitable for
measuring the properties of what are likely to be the progenitors of
present-day luminous gal... | 9601153v1 |
1996-07-23 | A damped Ly-alpha candidate at z~0.1 toward Q 0439-433 | We report on the detection of a z_gal=0.101 galaxy projected on the sky at
4.2 arcsec (or 5.2 h^{-1} kpc for q_o=0.5) from the quasar Q 0439-433
(z_em=0.594). The HST spectrum of the quasar shows strong MgII, FeII, SiII,
AlII and CIV absorption lines at the same redshift as the galaxy. The
equivalent width ratios of th... | 9607111v2 |
1997-08-11 | Dynamos with different formulations of a dynamic alpha-effect | We investigate the behaviour of $\alpha\Omega$ dynamos with a dynamic
$\alpha$, whose evolution is governed by the imbalance between a driving and a
damping term. We focus on truncated versions of such dynamo models which are
often studied in connection with solar and stellar variability. Given the
approximate nature o... | 9708093v1 |
1997-11-20 | ORT observations of the damped Lyman alpha system towards PKS 0201+113 | We report a deep radio search with the Ooty Radio Telescope (ORT) for the
redshifted 21 cm absorption line from the damped Lyman alpha system seen at
redshift 3.388 against the quasar PKS 0201+113. This is currently the most
distant system for which a detection of 21 cm absorption has been claimed. The
present observat... | 9711234v1 |
1998-01-28 | Dynamical Tide in Solar-Type Binaries | Circularization of late-type main-sequence binaries is usually attributed to
turbulent convection, while that of early-type binaries is explained by
resonant excitation of g modes. We show that the latter mechanism operates in
solar-type stars also and is at least as effective as convection, despite
inefficient damping... | 9801289v1 |
1998-02-06 | Acoustic oscillations and viscosity | Using a simple thermo-hydrodynamic model that respects relativistic
causality, we revisit the analysis of qualitative features of acoustic
oscillations in the photon-baryon fluid. The growing photon mean free path
introduces transient effects that can be modelled by the causal generalization
of relativistic Navier-Stok... | 9802074v2 |
2000-02-29 | Metallicity Evolution in the Early Universe | Observations of the damped Lya systems provide direct measurements on the
chemical enrichment history of neutral gas in the early universe. In this
Letter, we present new measurements for four damped Lya systems at high
redshift. Combining these data with [Fe/H] values culled from the literature,
we investigate the met... | 0002513v3 |
2000-06-02 | Surveys for z > 3 Damped Lyman-alpha Absorption Systems | We have completed spectroscopic observations using LRIS on the Keck 1
telescope of 30 very high redshift quasars, 11 selected for the presence of
damped Ly-alpha absorption systems and 19 with redshifts z > 3.5 not previously
surveyed for absorption systems. We have surveyed an additional 10 QSOs with
the Lick 120'' an... | 0006044v1 |
2000-06-21 | Constraints on the physical properties of the damped Ly-alpha system of Q0000-2619 at z = 3.054 | We present the detection of CII and CII* absorption in the z = 3.0543 damped
Ly-alpha system toward Q0000-2619. The derived population ratio implies a fine
structure excitation temperature between 19.6 and 21.6 K. The upper value sets
a strict upper limit on the CMB temperature at this redshift, which is
consistent wit... | 0006308v1 |
2001-04-10 | Damping scales of neutralino cold dark matter | The lightest supersymmetric particle, most likely the neutralino, might
account for a large fraction of dark matter in the Universe. We show that the
primordial spectrum of density fluctuations in neutralino cold dark matter
(CDM) has a sharp cut-off due to two damping mechanisms: collisional damping
during the kinetic... | 0104173v2 |
2002-05-15 | Building the bridge between Damped Ly-alpha Absorbers and Lyman Break galaxies | In 2000, we started the program ``Building the Bridge between Damped Ly-alpha
Absorbers and Lyman-Break Galaxies: Ly-alpha Selection of Galaxies'' at the
European Southern Observatory's Very Large Telescope. This project is an
attempt to use Ly-alpha selection of high-z galaxies to bridge the gap between
absorption- an... | 0205234v2 |
2002-05-23 | Constraining the strength of Dark Matter Interactions from Structure Formation | We discuss the damping of primordial dark matter fluctuations, taking into
account explicitly the interactions of dark matter - whatever their intensity -
both with itself and with other particle species. Relying on a general
classification of dark matter particle candidates, our analysis provides, from
structure forma... | 0205406v1 |
2002-06-06 | A catalogue of damped Lyman alpha absorption systems and radio flux densities of the background quasars | We present a catalogue of the 322 damped Lyman alpha absorbers taken from the
literature. All damped Lyman alpha absorbers are included, with no selection on
redshift or quasar magnitude. Of these, 123 are candidates and await
confirmation using high resolution spectroscopy. For all 322 objects we
catalogue the radio p... | 0206091v1 |
2002-11-14 | Formation of small-scale structure in SUSY CDM | The lightest supersymmetric particle, most likely the lightest neutralino, is
one of the most prominent particle candidates for cold dark matter (CDM). We
show that the primordial spectrum of density fluctuations in neutralino CDM has
a sharp cut-off, induced by two different damping mechanisms. During the
kinetic deco... | 0211325v1 |
2002-12-09 | Galaxies at z=3 around Damped Ly-alpha Clouds | We are exploring the connection between damped Ly-alpha absorbers (DLAs) and
Lyman break galaxies (LBGs) using deep -- (5sigma)=26 m_{AB}-- broad band
imaging (UBVI) of four wide fields (0.25 sq. deg. each) obtained at the Kitt
Peak 4-m telescope with MOSAIC. Each field contains a damped system at z=3.
We want to add... | 0212206v1 |
2003-04-16 | Building Blocks in Hierarchical Clustering Scenarios and their Connection with Damped Ly$α$ Systems | We carried out a comprehensive analysis of the chemical properties of the
interstellar medium (ISM) and the stellar population (SP) of current normal
galaxies and their progenitors in a hierarchical clustering scenario. We
compared the results with observations of Damped Lyman-$\alpha$ systems (DLAs)
under the hypothes... | 0304303v2 |
2003-05-16 | The ESI/KeckII Damped Lya Abundance Database | This paper presents chemical abundance measurements for 37 damped Lya systems
at z>2.5 observed with the Echellette Spectrograph and Imager on the KeckII
telescope. We measure the HI column densities of these damped systems through
Voigt profile fits to their Lya profiles and we implement the apparent optical
depth met... | 0305312v1 |
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