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2016-05-09 | Storage-ring Electron Cooler for Relativistic Ion Beams | Application of electron cooling at ion energies above a few GeV has been
limited due to reduction of electron cooling efficiency with energy and
difficulty in producing and accelerating a high-current high-quality electron
beam. A high-current storage-ring electron cooler offers a solution to both of
these problems by ... | 1605.02594v1 |
2016-07-06 | Measuring Collisionless Damping in Heliospheric Plasmas using Field-Particle Correlations | An innovative field-particle correlation technique is proposed that uses
single-point measurements of the electromagnetic fields and particle velocity
distribution functions to investigate the net transfer of energy from fields to
particles associated with the collisionless damping of turbulent fluctuations
in weakly c... | 1607.01738v1 |
2016-07-22 | Excitation of nonlinear ion acoustic waves in CH plasmas | Excitation of nonlinear ion acoustic wave (IAW) by an external electric field
is demonstrated by Vlasov simulation. The frequency calculated by the
dispersion relation with no damping is verified much closer to the resonance
frequency of the small-amplitude nonlinear IAW than that calculated by the
linear dispersion re... | 1607.06598v1 |
2016-11-17 | A stable partitioned FSI algorithm for rigid bodies and incompressible flow. Part II: General formulation | A stable partitioned algorithm is developed for fluid-structure interaction
(FSI) problems involving viscous incompressible flow and rigid bodies. This
{\em added-mass partitioned} (AMP) algorithm remains stable, without
sub-iterations, for light and even zero mass rigid bodies when added-mass and
viscous added-damping... | 1611.05703v2 |
2017-03-01 | The Plastic Scintillator Detector at DAMPE | he DArk Matter Particle Explorer (DAMPE) is a general purposed
satellite-borne high energy $\gamma-$ray and cosmic ray detector, and among the
scientific objectives of DAMPE are the searches for the origin of cosmic rays
and an understanding of Dark Matter particles. As one of the four detectors in
DAMPE, the Plastic S... | 1703.00098v1 |
2017-03-22 | Observation of a strong coupling effect on electron-ion collisions in ultracold plasmas | Ultracold plasmas (UCP) provide a well-controlled system for studying
multiple aspects in plasma physics that include collisions and strong coupling
effects. By applying a short electric field pulse to a UCP, a plasma electron
center-of-mass (CM) oscillation can be initiated. In accessible parameter
ranges, the damping... | 1703.07852v2 |
2017-04-18 | Critical pairing fluctuations in the normal state of a superconductor: pseudogap and quasi-particle damping | We study the effect of critical pairing fluctuations on the electronic
properties in the normal state of a clean superconductor in three dimensions.
Using a functional renormalization group approach to take the non-Gaussian
nature of critical fluctuations into account, we show microscopically that in
the BCS regime, wh... | 1704.05282v2 |
2017-05-29 | Probing decoherence in plasmonic waveguides in the quantum regime | We experimentally investigate the decoherence of single surface plasmon
polaritons in metal stripe waveguides. In our study we use a Mach-Zehnder
configuration previously considered for measuring decoherence in atomic,
electronic and photonic systems. By placing waveguides of different length in
one arm we are able to ... | 1705.10344v2 |
2017-07-21 | Spatially Localized Particle Energization by Landau Damping in Current Sheets Produced by Strong Alfven Wave Collisions | Understanding the removal of energy from turbulent fluctuations in a
magnetized plasma and the consequent energization of the constituent plasma
particles is a major goal of heliophysics and astrophysics. Previous work has
shown that nonlinear interactions among counterpropagating Alfven waves---or
Alfven wave collisio... | 1708.00757v1 |
2017-10-30 | Enhancement of intrinsic magnetic damping in defect-free epitaxial Fe3O4 thin films | We have investigated the magnetic damping of precessional spin dynamics in
defect-controlled epitaxial grown Fe$_3$O$_4$(111)/Yttria-stabilized Zirconia
(YSZ) nanoscale films by all-optical pump-probe measurements. The intrinsic
damping constant of the defect-free Fe$_3$O$_4$ film is found to be strikingly
larger than ... | 1710.10938v2 |
2018-05-26 | Critical collapse of ultra-relativistic fluids: damping or growth of aspherical deformations | We perform fully nonlinear numerical simulations to study aspherical
deformations of the critical self-similar solution in the gravitational
collapse of ultra-relativistic fluids. Adopting a perturbative calculation,
Gundlach predicted that these perturbations behave like damped or growing
oscillations, with the freque... | 1805.10442v1 |
2018-06-19 | Non-linear Relaxation of Interacting Bosons Coherently Driven on a Narrow Optical Transition | We study the dynamics of a two-component Bose-Einstein condensate (BEC) of
$^{174}$Yb atoms coherently driven on a narrow optical transition. The
excitation transfers the BEC to a superposition of states with different
internal and momentum quantum numbers. We observe a crossover with decreasing
driving strength betwee... | 1806.07210v2 |
2018-10-16 | The Solution to the Differential Equation with Linear Damping describing a Physical Systems governed by a Cubic Energy Potential | An analytical solution to the nonlinear differential equation describing the
equation of motion of a particle moving in an unforced physical system with
linear damping, governed by a cubic potential well, is presented in terms of
the Jacobi elliptic functions. In the attractive region of the potential the
system become... | 1810.10336v1 |
2019-01-10 | Damping and softening of transverse acoustic phonons in colossal magnetoresistive La$_{0.7}$Ca$_{0.3}$MnO$_3$ and La$_{0.7}$Sr$_{0.3}$MnO$_3$ | Neutron spectroscopy is used to probe transverse acoustic phonons near the
(2, 2, 0) Bragg position in colossal magnetoresistive La0.7Ca0.3MnO3 and
La0.7Sr0.3MnO3. Upon warming to temperatures near Tc = 257 K the phonon peaks
in La0.7Ca0.3MnO3 soften and damp significantly with the phonon half width at
half maximum app... | 1901.03394v1 |
2019-03-13 | Inference of magnetic field strength and density from damped transverse coronal waves | A classic application of coronal seismology uses transverse oscillations of
waveguides to obtain estimates of the magnetic field strength. The procedure
requires information on the density of the structures. Often, it ignores the
damping of the oscillations. We computed marginal posteriors for parameters
such as the wa... | 1903.05437v1 |
2019-03-14 | A metal-poor damped Ly-alpha system at redshift 6.4 | We identify a strong Ly-alpha damping wing profile in the spectrum of the
quasar P183+05 at z=6.4386. Given the detection of several narrow metal
absorption lines at z=6.40392, the most likely explanation for the absorption
profile is that it is due to a damped Ly-alpha system. However, in order to
match the data a con... | 1903.06186v2 |
2019-04-30 | DmpIRFs and DmpST: DAMPE Instrument Response Functions and Science Tools for Gamma-Ray Data Analysis | GeV gamma ray is an important observation target of DArk Matter Particle
Explorer (DAMPE) for indirect dark matter searching and high energy
astrophysics. We present in this work a set of accurate instrument response
functions of DAMPE (DmpIRFs) including the effective area, point-spread
function and energy dispersion ... | 1904.13098v1 |
2019-05-14 | Fractional damping through restricted calculus of variations | We deliver a novel approach towards the variational description of Lagrangian
mechanical systems subject to fractional damping by establishing a restricted
Hamilton's principle. Fractional damping is a particular instance of non-local
(in time) damping, which is ubiquitous in mechanical engineering applications.
The re... | 1905.05608v1 |
2019-07-16 | Damping of slow magnetoacoustic oscillations by the misbalance between heating and cooling processes in the solar corona | Rapidly decaying slow magnetoacoustic waves are regularly observed in the
solar coronal structures, offering a promising tool for a seismological
diagnostics of the coronal plasma, including its thermodynamical properties.
The effect of damping of standing slow magnetoacoustic oscillations in the
solar coronal loops is... | 1907.07051v1 |
2019-08-22 | Influence of structure and cation distribution on magnetic anisotropy and damping in Zn/Al doped nickel ferrites | An in-depth analysis of Zn/Al doped nickel ferrites grown by reactive
magnetron sputtering is relevant due to their promising characteristics for
applications in spintronics. The material is insulating and ferromagnetic at
room temperature with an additional low magnetic damping. By studying the
complex interplay betwe... | 1908.08257v3 |
2019-09-11 | Critical corrections to formulations of nonlinear energy dissipation of ultrasonically excited bubbles and a unifying parameter to asses and enhance bubble activity in applications | Nonlinear oscillations of bubbles can significantly increase the attenuation
of the host media. Optimization of bubble related applications needs a
realistic estimation of the medium attenuation and bubble activity. A correct
estimation of the wave attenuation in bubbly media requires an accurate
estimation of the powe... | 1909.04864v1 |
2019-09-14 | Measurement-Based Wide-Area Damping of Inter-Area Oscillations based on MIMO Identification | Interconnected power grid exhibits oscillatory response after a disturbance
in the system. One such type of oscillations, the inter-area oscillations has
the oscillation frequency in the range of 0.1 to 1 Hz. The damping of
inter-area oscillations is difficult with local controllers, but it can be
achieved using a Wide... | 1909.06687v1 |
2020-03-16 | Spin-orbit torques originating from bulk and interface in Pt-based structures | We investigated spin-orbit torques in prototypical Pt-based spintronic
devices. We found that, in Pt/Ni and Pt/Fe bilayers, the damping-like torque
efficiency depends on the thickness of the Pt layer. We also found that the
damping-like torque efficiency is almost identical in the Pt/Ni and Pt/Fe
bilayers despite the s... | 2003.07271v2 |
2020-03-23 | Heat-like and wave-like lifespan estimates for solutions of semilinear damped wave equations via a Kato's type lemma | In this paper we study several semilinear damped wave equations with
"subcritical" nonlinearities, focusing on demonstrating lifespan estimates for
energy solutions. Our main concern is on equations with scale-invariant damping
and mass. Under different assumptions imposed on the initial data, lifespan
estimates from a... | 2003.10578v1 |
2020-09-03 | Dynamics of magnetic collective modes in the square and triangular lattice Mott insulators at finite temperature | We study the equilibrium dynamics of magnetic moments in the Mott insulating
phase of the Hubbard model on the square and triangular lattice. We rewrite the
Hubbard interaction in terms of an auxiliary vector field and use a recently
developed Langevin scheme to study its dynamics. A thermal `noise', derivable
approxim... | 2009.01833v2 |
2020-09-15 | Classification of the mechanisms of wave energy dissipation in the nonlinear oscillations of coated and uncoated bubbles | Acoustic waves are dissipated when they pass through bubbly media.
Dissipation by bubbles takes place through thermal damping (Td), radiation
damping (Rd) and damping due to the friction of the liquid (Ld) and friction of
the coating (Cd). Knowledge of the contributions of the Td, Rd, Ld and Cd
during nonlinear bubble ... | 2009.07380v1 |
2020-11-18 | The effect of redshift degeneracy and the damping effect of viscous medium on the information extracted from gravitational wave signals | Considering the cosmological redshift $z_c$ , the mass of GW source extracted
from GW signal is $1+z_c$ times larger than its intrinsic value, and distance
between detector and GW source should be regarded as luminosity distance.
However, besides cosmological redshift, there are other kinds of redshifts
should be consi... | 2011.09169v2 |
2020-12-28 | On the Efficacy of Friction Damping in the Presence of Nonlinear Modal Interactions | This work addresses friction-induced modal interactions in jointed
structures, and their effects on the passive mitigation of vibrations by means
of friction damping. Under the condition of (nearly) commensurable natural
frequencies, the nonlinear character of friction can cause so-called nonlinear
modal interactions. ... | 2101.03232v1 |
2021-06-30 | Origin of Nonlinear Damping due to Mode Coupling in Auto-Oscillatory Modes Strongly Driven by Spin-Orbit Torque | We investigate the physical origin of nonlinear damping due to mode coupling
between several auto-oscillatory modes driven by spin-orbit torque in
constricted Py/Pt heterostructures by examining the dependence of
auto-oscillation on temperature and applied field orientation. We observe a
transition in the nonlinear dam... | 2107.00150v2 |
2021-07-15 | On the long-time behavior for a damped Navier-Stokes-Bardina model | In this paper, we consider a damped Navier-Stokes-Bardina model posed on the
whole three-dimensional. These equations have an important physical motivation
and they arise from some oceanic model. From the mathematical point of view,
they write down as the well-know Navier-Stokes equations with an additional
nonlocal op... | 2107.07070v2 |
2021-07-17 | Plasmon-Exciton Coupling Effect on Plasmon Damping | Plasmon decay via the surface or interface is a critical process for
practical energy conversion and plasmonic catalysis. However, the relationship
between plasmon damping and the coupling between the plasmon and 2D materials
is still unclear. The spectral splitting due to plasmon-exciton interaction
impedes the conven... | 2107.08230v1 |
2021-10-12 | Outflows in the presence of cosmic rays and waves with cooling | Plasma outflow from a gravitational potential well with cosmic rays and
self-excited Alfv\'en waves with cooling and wave damping is studied in the
hydrodynamics regime. We study outflows in the presence of cosmic ray and
Alfv\'en waves including the effect of cooling and wave damping. We seek
physically allowable stea... | 2110.06170v1 |
2021-11-19 | Finite time extinction for a class of damped Schr{ö}dinger equations with a singular saturated nonlinearity | We present some sharper finite extinction time results for solutions of a
class of damped nonlinear Schr{\"o}dinger equations when the nonlinear damping
term corresponds to the limit cases of some ``saturating non-Kerr law''
$F(|u|^2)u=\frac{a}{\varepsilon+(|u|^2)^\alpha}u,$ with $a\in\mathbb{C},$
$\varepsilon\geqslant... | 2111.10136v2 |
2022-01-26 | Effect of Chiral Damping on the dynamics of chiral domain walls and skyrmions | Friction plays an essential role in most physical processes that we
experience in our everyday life. Examples range from our ability to walk or
swim, to setting boundaries of speed and fuel efficiency of moving vehicles. In
magnetic systems, the displacement of chiral domain walls (DW) and skyrmions
(SK) by Spin Orbit ... | 2201.10742v1 |
2022-01-27 | A Study on Monte Carlo simulation of the radiation environment above GeV at the DAMPE orbit | The Dark Matter Particle Explorer (DAMPE) has been undergoing a stable
on-orbit operation for more than 6 years and acquired observation of over 11
billion events. And a better understanding of the overall radiation environment
on the DAMPE orbit is crucial for both simulation data production and flight
data analysis. ... | 2201.11364v1 |
2022-06-08 | Motion control with optimal nonlinear damping: from theory to experiment | Optimal nonlinear damping control was recently introduced for the
second-order SISO systems, showing some advantages over a classical PD feedback
controller. This paper summarizes the main theoretical developments and
properties of the optimal nonlinear damping controller and demonstrates, for
the first time, its pract... | 2206.03802v2 |
2022-09-22 | Neutrino Fast Flavor Pendulum. Part 2: Collisional Damping | In compact astrophysical objects, the neutrino density can be so high that
neutrino-neutrino refraction can lead to fast flavor conversion of the kind
$\nu_e \bar\nu_e \leftrightarrow \nu_x \bar\nu_x$ with $x=\mu,\tau$, depending
on the neutrino angle distribution. Previously, we have shown that in a
homogeneous, axisy... | 2209.11235v3 |
2022-10-12 | Second order two-species systems with nonlocal interactions: existence and large damping limits | We study the mathematical theory of second order systems with two species,
arising in the dynamics of interacting particles subject to linear damping, to
nonlocal forces and to external ones, and resulting into a nonlocal version of
the compressible Euler system with linear damping. Our results are limited to
the $1$ s... | 2210.06162v1 |
2022-10-12 | Stability of the Néel quantum critical point in the presence of Dirac fermions | We investigate the stability of the N\'eel quantum critical point of
two-dimensional quantum antiferromagnets, described by a non-linear $\sigma$
model (NL$\sigma$M), in the presence of a Kondo coupling to $N_f$ flavours of
two-component Dirac fermion fields. The long-wavelength order parameter
fluctuations are subject... | 2210.06577v3 |
2022-11-13 | Damping analysis of Floating Offshore Wind Turbine (FOWT): a new control strategy reducing the platform vibrations | In this paper, the coupled dynamics of the floating platform and the WTG
rotor is analysed. In particular, the damping is explicitly derived from the
coupled equations of rotor and floating platform. The analysis of the damping
leads to the study of the instability phenomena and it derives the explicit
conditions that ... | 2211.10362v1 |
2022-11-22 | Universal Dynamics of Damped-Driven Systems: The Logistic Map as a Normal Form for Energy Balance | Damped-driven systems are ubiquitous in engineering and science. Despite the
diversity of physical processes observed in a broad range of applications, the
underlying instabilities observed in practice have a universal characterization
which is determined by the overall gain and loss curves of a given system. The
unive... | 2211.11748v1 |
2023-01-23 | Optimal Inter-area Oscillation Damping Control: A Transfer Deep Reinforcement Learning Approach with Switching Control Strategy | Wide-area damping control for inter-area oscillation (IAO) is critical to
modern power systems. The recent breakthroughs in deep learning and the broad
deployment of phasor measurement units (PMU) promote the development of
datadriven IAO damping controllers. In this paper, the damping control of IAOs
is modeled as a M... | 2301.09321v1 |
2023-04-13 | Centralised Multimode Power Oscillation Damping Controller for Photovoltaic Plants with Communication Delay Compensation | Low-frequency oscillations are an inherent phenomena in transmission networks
and renewable energy plants should be configured to damp them. Commonly, a
centralised controller is used in PV plants to coordinate PV generators via
communication channels. However, the communication systems of PV plants
introduce delays of... | 2304.06415v1 |
2023-05-09 | Glassy heat capacity from overdamped phasons and a hypothetical phason-induced superconductivity in incommensurate structures | Phasons are collective low-energy modes that appear in disparate condensed
matter systems such as quasicrystals, incommensurate structures, fluctuating
charge density waves, and Moir\'e superlattices. They share several
similarities with acoustic phonon modes, but they are not protected by any
exact translational symme... | 2305.05407v2 |
2023-08-03 | Flavor-wave theory with quasiparticle damping at finite temperatures: Application to chiral edge modes in the Kitaev model | We propose a theoretical framework to investigate elementary excitations at
finite temperatures within a localized electron model that describes the
interactions between multiple degrees of freedom, such as quantum spin models
and Kugel-Khomskii models. Thus far, their excitation structures have been
mainly examined us... | 2308.01711v1 |
2024-02-13 | Investigating the Effect of Noise on the Training Performance of Hybrid Quantum Neural Networks | In this paper, we conduct a comprehensively analyze the influence of
different quantum noise gates, including Phase Flip, Bit Flip, Phase Damping,
Amplitude Damping, and the Depolarizing Channel, on the performance of HyQNNs.
Our results reveal distinct and significant effects on HyQNNs training and
validation accuraci... | 2402.08523v1 |
2024-03-03 | Magnonic $\varphi$ Josephson Junctions and Synchronized Precession | There has been a growing interest in non-Hermitian physics. One of its main
goals is to engineer dissipation and to explore ensuing functionality. In
magnonics, the effect of dissipation due to local damping on magnon transport
has been explored. However, the effects of non-local damping on the magnonic
analog of the J... | 2403.01625v1 |
2003-03-03 | Sur une generalisation des coefficients binomiaux | We prove a recent conjecture of Lassalle about positivity and integrality of
coefficients in some polynomial expansions. We also give a combinatorial
interpretation of those numbers. Finally, we show that this question is closely
related to the fundamental problem of calculating the linearization
coefficients for binom... | 0303025v1 |
2013-06-18 | Estimating Certain Non-Zero Littlewood-Richardson Coefficients | Littlewood Richardson coefficients are structure constants appearing in the
representation theory of the general linear groups ($GL_n$). The main results
of this paper are: 1. A strongly polynomial randomized approximation scheme for
certain Littlewood-Richardson coefficients. 2. A proof of approximate
log-concavity of... | 1306.4060v1 |
2014-10-29 | Rectangular symmetries for coefficients of symmetric functions | We show that some of the main structural constants for symmetric functions
(Littlewood-Richardson coefficients, Kronecker coefficients, plethysm
coefficients, and the Kostka--Foulkes polynomials) share symmetries related to
the operations of taking complements with respect to rectangles and adding
rectangles. | 1410.8017v1 |
2020-02-03 | The Computational Complexity of Plethysm Coefficients | In two papers, B\"urgisser and Ikenmeyer (STOC 2011, STOC 2013) used an
adaption of the geometric complexity theory (GCT) approach by Mulmuley and
Sohoni (Siam J Comput 2001, 2008) to prove lower bounds on the border rank of
the matrix multiplication tensor. A key ingredient was information about
certain Kronecker coef... | 2002.00788v1 |
2007-06-04 | Bounds for Hilbert coefficients | We compute the Hilbert coefficients of a graded module with pure resolution
and discuss lower and upper bounds for these coefficients for arbitrary graded
modules. | 0706.0400v1 |
2020-06-23 | Recurrence relations of Li coefficients | One of equivalents of the Riemann hypothesis is Li's criterion that all Li
coefficients are positive. We study recurrence relations of Li coefficients in
this note. | 2006.13103v1 |
2007-05-02 | The Truth About Ballistic Coefficients | The ballistic coefficient of a bullet describes how it slows in flight due to
air resistance. This article presents experimental determinations of ballistic
coefficients showing that the majority of bullets tested have their previously
published ballistic coefficients exaggerated from 5-25% by the bullet
manufacturers.... | 0705.0389v1 |
2008-12-11 | Lorentz Violation and Alpha-Decay | Relating the effective Lorentz violation coefficients for composite particles
to the coefficients for their constituent fields is a challenging problem. We
calculate the Lorentz violation coefficients relevant to the dynamics of an
alpha-particle in terms of proton and neutron coefficients. The alpha-particle
coefficie... | 0812.2236v1 |
2010-09-28 | Absolute continuity under flows generated by SDE with measurable drift coefficient | We consider the It\^{o} SDE with non-degenerate diffusion coefficient and
measurable drift coefficient. Under the condition that the gradient of the
diffusion coefficient and the divergences of the diffusion and drift
coefficients are exponentially integrable with respect to the Gaussian measure,
we show that the stoch... | 1009.5525v1 |
2016-01-03 | BCJ Relations for One-Loop QCD Integral Coefficients | We present a set of one-loop integral coefficient relations in QCD. The
unitarity method is useful for exposing one-loop amplitudes in terms of tree
amplitudes. The coefficient relations are induced by tree-level BCJ amplitude
relations. We provide examples for box, triangle, and bubble coefficients.
These relations re... | 1601.00235v1 |
2017-03-10 | On Coefficient problem for bi-univalent analytic functions | Estimates for initial coefficients of Taylor-Maclaurin series of bi-univalent
functions belonging to certain classes defined by subordination are obtained.
Our estimates improve upon the earlier known estimates for second and third
coefficient. The bound for the fourth coefficient is new. In addition, bound
for the fif... | 1703.03598v1 |
2023-05-09 | Saturation for Flagged Skew Littlewood-Richardson Coefficients | We define and study a generalization of the Littlewood-Richardson (LR)
coefficients, which we call the flagged skew LR coefficients. These subsume
several previously studied extensions of the LR coefficients. We establish the
saturation property for these coefficients, generalizing work of Knutson-Tao
and Kushwaha-Ragh... | 2305.05195v2 |
2023-06-11 | Extreme coefficients of multiplicity Tutte polynomials | The multiplicity Tutte polynomial, which includes the arithmetic Tutte
polynomial, is a generalization of the classical Tutte polynomial of matroids.
In this paper, we obtain an expression of the general coefficient and the
expressions of six extreme coefficients of multiplicity Tutte polynomials. In
particular, an exp... | 2306.06568v2 |
2023-09-10 | Testing for Stationary or Persistent Coefficient Randomness in Predictive Regressions | This study considers tests for coefficient randomness in predictive
regressions. Our focus is on how tests for coefficient randomness are
influenced by the persistence of random coefficient. We find that when the
random coefficient is stationary, or I(0), Nyblom's (1989) LM test loses its
optimality (in terms of power)... | 2309.04926v3 |
2004-10-24 | Note on the generalized Hansen and Laplace coefficients | Recently, Breiter et al (2004) reported the computation of Hansen
coefficients $X_k^{\gamma,m}$ for non integer values of $\gamma$. In fact, the
Hansen coefficients are closely related to the Laplace $b_{s}^{(m)}$, and
generalized Laplace coefficients $b_{s,r}^{(m)}$ (Laskar and Robutel, 1995)
that do not require $s,r$... | 0410557v2 |
2010-10-19 | Coefficient convexity of divisors of x^n-1 | We say a polynomial f having integer coefficients is strongly coefficient
convex if the set of coefficients of f consists of consecutive integers only.
We establish various results suggesting that the divisors of x^n-1 with integer
coefficients have the tendency to be strongly coefficient convex and have small
coeffici... | 1010.3938v2 |
2013-10-15 | Measuring correlations between non-stationary series with DCCA coefficient | In this short report, we investigate the ability of the DCCA coefficient to
measure correlation level between non-stationary series. Based on a wide Monte
Carlo simulation study, we show that the DCCA coefficient can estimate the
correlation coefficient accurately regardless the strength of non-stationarity
(measured b... | 1310.3984v1 |
2019-07-18 | Horn inequalities for nonzero Kronecker coefficients | The Kronecker coefficients and the Littlewood-Richardson coefficients are
nonnegative integers depending on three partitions. By definition, these
coefficients are the multiplicities of the tensor product decomposition of two
irreducible representations of symmetric groups (resp. linear groups). By a
classical Littlewo... | 1907.07931v1 |
2022-12-13 | Interaction phenomenon for variable coefficient Kadomtsev-Petviashvili equation by utilizing variable coefficient bilinear neural network method | In this paper, a variable coefficient Bilinear neural network method is
proposed to deal with the analytical solutions of variable coefficient
nonlinear partial differential equations. As an example, a
Kadomstev-Petviashvili equation with variable coefficients is investigated by
using the variable coefficient Bilinear ... | 2301.10069v1 |
2023-08-22 | Sharp bounds on Coefficient functionals of certain Sakaguchi functions | We determine sharp bounds on some Hankel determinants involving initial
coefficients, inverse coefficients, and logarithmic inverse coefficients for
two subclasses of Sakaguchi functions which are associated with the right half
of the lemniscate of Bernoulli and the exponential function. Further, we
compute sharp bound... | 2308.11352v1 |
2023-12-22 | Asymptotic coefficients of multiple zeta functions at the origin and generalized Gregory coefficients | Due to their singularities, multiple zeta functions behave sensitively at
non-positive integer points. In this article, we focus on the asymptotic
behavior at the origin $(0,\dots, 0)$ and unveil the generating series of the
asymptotic coefficients as a generalization of the classical Gregory
coefficients. This enables... | 2312.14475v1 |
1997-01-17 | Evidence for Rotation in the Galaxy at z=3.15 Responsible for a Damped Lyman-alpha Absorption System in the Spectrum of Q2233+1310 | Proof of the existence of a significant population of normal disk galaxies at
redshift z>2 would have profound implications for theories of structure
formation and evolution. We present evidence based on Keck HIRES observations
that the damped Lyman-alpha absorber at z=3.15 toward the quasar Q2233+1310 may
well be such... | 9701116v2 |
1997-04-11 | The Metallicity of High Redshift Galaxies: The Abundance of Zinc in 34 Damped Lyman Alpha Systems from z = 0.7 to 3.4 | We report new observations of ZnII and CrII absorption lines in 10 damped
\lya systems (DLAs), mostly at redshift $z_{abs} \simgt 2.5$ . By combining
these results with those from our earlier survey (Pettini et al. 1994) and
other recent data, we construct a sample of 34 measurements (or upper limits)
of the Zn abundan... | 9704102v1 |
1997-04-17 | On the Kinematics of the Damped Lyman Alpha Protogalaxies | We present the first results of an ongoing program to investigate the
kinematic characteristics of high redshift damped lya systems. Because damped
lya systems are widely believed to be the progenitors of current massive
galaxies, an analysis of their kinematic history allows a direct test of galaxy
formation scenarios... | 9704169v2 |
2000-11-20 | H-alpha Imaging with HST+NICMOS of An Elusive Damped Ly-alpha Cloud at z=0.6 | Despite previous intensive ground-based imaging and spectroscopic campaigns
and wide-band HST imaging of the z=0.927 QSO 3C336 field, the galaxy that hosts
the damped Ly-alpha system along this line-of-sight has eluded detection. We
present a deep narrow-band H-alpha image of the field of this z=0.656 damped
Ly-alpha a... | 0011374v2 |
2005-08-17 | The SDSS Damped Lya Survey: Data Release 3 | We present the results from a damped Lya survey of the Sloan Digital Sky
Survey, Data Release 3 based on over 500 new damped Lya systems at z>2.2. We
measure the HI column density distribution f(N) and its zeroth and first
moments (the incidence l(X) and gas mass-density O_dla of damped Lya systems,
respectively) as a ... | 0508361v1 |
2011-09-07 | Weakly collisional Landau damping and three-dimensional Bernstein-Greene-Kruskal modes: New results on old problems | Landau damping and Bernstein-Greene-Kruskal (BGK) modes are among the most
fundamental concepts in plasma physics. While the former describes the
surprising damping of linear plasma waves in a collisionless plasma, the latter
describes exact undamped nonlinear solutions of the Vlasov equation. There does
exist a relati... | 1109.1353v1 |
2013-05-16 | Application of vibration-transit theory to distinct dynamic response for a monatomic liquid | We examine the distinct part of the density autocorrelation function Fd(q,t),
also called the intermediate scattering function, from the point of view of the
vibration-transit (V-T) theory of monatomic liquid dynamics. A similar study
has been reported for the self part, and we study the self and distinct parts
separat... | 1305.3954v2 |
2013-09-16 | Two-atom system as a nano-antenna for mode switching and light routing | We determine how a system composed of two nonidentical two-level atoms with
different resonance frequencies and different damping rates could work as a
nano-antenna for controlled mode switching and light routing. We calculate the
angular distribution of the emitted field detected in a far-field zone of the
system incl... | 1309.3924v1 |
2015-04-01 | Landau damping of Gardner solitons in a dusty bi-ion plasma | The effects of linear Landau damping on the nonlinear propagation of
dust-acoustic solitary waves (DASWs) are studied in a collisionless
unmagnetized dusty plasma with two species of positive ions. The extremely
massive, micron-seized, cold and negatively charged dust particles are
described by fluid equations, whereas... | 1504.00089v2 |
2017-07-18 | Explanations of the DAMPE high energy electron/positron spectrum in the dark matter annihilation and pulsar scenarios | Many studies have shown that either the nearby astrophysical source or dark
matter (DM) annihilation/decay is required to explain the origin of high energy
cosmic ray (CR) $e^\pm$, which are measured by many experiments, such as PAMELA
and AMS-02. Recently, the Dark Matter Particle Explorer (DAMPE) collaboration
has re... | 1707.05664v2 |
2018-06-27 | In-flight performance of the DAMPE silicon tracker | DAMPE (DArk Matter Particle Explorer) is a spaceborne high-energy cosmic ray
and gamma-ray detector, successfully launched in December 2015. It is designed
to probe astroparticle physics in the broad energy range from few GeV to 100
TeV. The scientific goals of DAMPE include the identification of possible
signatures of... | 1806.10355v1 |
2019-03-28 | Improving convergence of volume penalised fluid-solid interactions | We analyse and improve the volume-penalty method, a simple and versatile way
to model objects in fluid flows. The volume-penalty method is a kind of
fictitious-domain method that approximates no-slip boundary conditions with
rapid linear damping inside the object. The method can then simulate complex,
moving objects in... | 1903.11914v4 |
2019-06-12 | Study of Alfven Eigenmodes stability in plasma with multiple NBI driven energetic particle specie | The aim of this study is to analyze the destabilization of Alfven Eigenmodes
(AE) by multiple energetic particles (EP) species in DIII-D and LHD discharges.
We use the reduced MHD equations to describe the linear evolution of the
poloidal flux and the toroidal component of the vorticity in a full 3D system,
coupled wit... | 1906.05701v1 |
2019-11-05 | Observation of Nanoscale Opto-Mechanical Molecular Damping; Origin of Spectroscopic Contrast in Photo Induced Force Microscopy | We experimentally investigated the contrast mechanism of infrared
photoinduced force microscopy (PiFM) for recording vibrational resonances.
Extensive experiments have demonstrated that spectroscopic contrast in PiFM is
mediated by opto-mechanical damping of the cantilever oscillation as the
optical wavelength is scann... | 1911.05190v1 |
2020-06-08 | Stochastic re-acceleration and magnetic-field damping in Tycho's supernova remnant | A number of studies suggest that shock acceleration with particle feedback
and very efficient magnetic-field amplification combined with Alfv\'{e}nic
drift are needed to explain the rather soft radio spectrum and the narrow rims
observed for Tycho's SNR. We show that the broadband spectrum of Tycho's SNR
can alternativ... | 2006.04832v1 |
2021-02-23 | Influence of Ion-Neutral Damping on the Cosmic-Ray Streaming Instability: Magnetohydrodynamic Particle-in-cell Simulations | We explore the physics of the gyro-resonant cosmic ray streaming instability
(CRSI) including the effects of ion-neutral (IN) damping. This is the main
damping mechanism in (partially-ionized) atomic and molecular gas, which are
the primary components of the interstellar medium (ISM) by mass. Limitation of
CRSI by IN d... | 2102.11878v3 |
2022-06-17 | Quantum Dynamics of Magnetic Skyrmions: Consistent Path Integral Formulation | We present a path integral formalism for the intrinsic quantum dynamics of
magnetic skyrmions coupled to a thermal background of magnetic fluctuations.
Upon promoting the skyrmion's collective coordinate $\boldsymbol{R}$ to a
dynamic variable and integrating out the magnonic heat bath, we derive the
generalized equatio... | 2206.08532v2 |
2024-02-05 | Revisiting the role of cosmic-ray driven Alfvén waves in pre-existing magnetohydrodynamic turbulence. I. Turbulent damping rates and feedback on background fluctuations | Alfv\'en waves (AWs) excited by the cosmic-ray (CR) streaming instability
(CRSI) are a fundamental ingredient for CR confinement. The effectiveness of
self-confinement relies on a balance between CRSI growth rate and damping
mechanisms acting on quasi-parallel AWs excited by CRs. One relevant mechanism
is the so-called... | 2402.02901v1 |
2006-10-24 | Logical contradictions of Landau damping | Landau damping/growing at boundary condition of excitation of a harmonic wave
in collisionless ion-electron-neutrals plasma contradicts to the law of energy
conservation of a wave damping/growing in space. There is also no criterion of
a choice either damping or growing solution in difference from always
non-damping in... | 0610220v67 |
1999-12-17 | Infrared Spectroscopy of a Massive Obscured Star Cluster in the Antennae Galaxies (NGC 4038/4039) with NIRSPEC | We present infrared spectroscopy of the Antennae Galaxies (NGC 4038/4039)
with NIRSPEC at the W. M. Keck Observatory. We imaged the star clusters in the
vicinity of the southern nucleus (NGC 4039) in 0.39" seeing in K-band using
NIRSPEC's slit-viewing camera. The brightest star cluster revealed in the
near-IR (M_K(0) =... | 9912369v1 |
2000-09-07 | Practical Quantum Cryptography: A Comprehensive Analysis (Part One) | We perform a comprehensive analysis of practical quantum cryptography (QC)
systems implemented in actual physical environments via either free-space or
fiber-optic cable quantum channels for ground-ground, ground-satellite,
air-satellite and satellite-satellite links. (1) We obtain universal
expressions for the effecti... | 0009027v5 |
2009-08-07 | The Dominance of Metal-Rich Streams in Stellar Halos: A Comparison Between Substructure in M31 and Lambda-CDM Models | Extensive photometric and spectroscopic surveys of the Andromeda galaxy (M31)
have discovered tidal debris features throughout M31's stellar halo. We present
stellar kinematics and metallicities in fields with identified substructure
from our on-going SPLASH survey of M31 red giant branch stars with the DEIMOS
spectrog... | 0908.1111v1 |
2009-09-25 | The SPLASH Survey: A Spectroscopic Portrait of Andromeda's Giant Southern Stream | The giant southern stream (GSS) is the most prominent tidal debris feature in
M31's stellar halo. The GSS is composed of a relatively metal-rich, high
surface-brightness "core" and a lower metallicity, lower surface brightness
"envelope." We present Keck/DEIMOS spectroscopy of red giant stars in six
fields in the vicin... | 0909.4540v1 |
2011-05-28 | Transmission Control of Two-User Slotted ALOHA Over Gilbert-Elliott Channel: Stability and Delay Analysis | In this paper, we consider the problem of calculating the stability region
and average delay of two user slotted ALOHA over a Gilbert-Elliott channel,
where users have channel state information and adapt their transmission
probabilities according to the channel state. Each channel has two states,
namely, the 'good' and... | 1105.5676v2 |
2012-10-11 | Global Properties of M31's Stellar Halo from the SPLASH Survey. I. Surface Brightness Profile | We present the surface brightness profile of M31's stellar halo out to a
projected radius of 175 kpc. The surface brightness estimates are based on
confirmed samples of M31 red giant branch stars derived from Keck/DEIMOS
spectroscopic observations. A set of empirical spectroscopic and photometric
M31 membership diagnos... | 1210.3362v2 |
2014-09-12 | Global Properties of M31's Stellar Halo from the SPLASH Survey: II. Metallicity Profile | We present the metallicity distribution of red giant branch (RGB) stars in
M31's stellar halo, derived from photometric metallicity estimates for over
1500 spectroscopically confirmed RGB halo stars. The stellar sample comes from
38 halo fields observed with the Keck/DEIMOS spectrograph, ranging from 9 to
175 kpc in pr... | 1409.3843v1 |
2016-07-15 | Solving the stochastic Landau-Lifshitz-Gilbert-Slonczewski equation for monodomain nanomagnets : A survey and analysis of numerical techniques | The stochastic Landau-Lifshitz-Gilbert-Slonczewski (s-LLGS) equation is
widely used to study the temporal evolution of the macrospin subject to spin
torque and thermal noise. The numerical simulation of the s-LLGS equation
requires an appropriate choice of stochastic calculus and numerical integration
scheme. In this p... | 1607.04596v4 |
2016-11-30 | Low Energy Supergravity Revisited (I) | General forms of the K\"ahler and superpotenials that lead to consistent low
energy broken Supersymmetry originating from $N=1$ Supergravity have been
classified and used for model building since more than three decades. We point
out the incompleteness of this classification when hidden sector vacuum
expectation values... | 1611.10327v2 |
2018-09-24 | Ionic Tuning of Cobaltites at the Nanoscale | Control of materials through custom design of ionic distributions represents
a powerful new approach to develop future technologies ranging from spintronic
logic and memory devices to energy storage. Perovskites have shown particular
promise for ionic devices due to their high ion mobility and sensitivity to
chemical s... | 1809.08728v1 |
2019-04-10 | The Convergence of Iterative Delegations in Liquid Democracy in a Social Network | Liquid democracy is a collective decision making paradigm which lies between
direct and representative democracy. One of its main features is that voters
can delegate their votes in a transitive manner such that: A delegates to B and
B delegates to C leads to A indirectly delegates to C. These delegations can be
effect... | 1904.05775v2 |
2019-06-20 | Ongoing Vaccine and Monoclonal Antibody HIV Prevention Efficacy Trials and Considerations for Sequel Efficacy Trial Designs | Four randomized placebo-controlled efficacy trials of a candidate vaccine or
passively infused monoclonal antibody for prevention of HIV-1 infection are
underway (HVTN 702 in South African men and women; HVTN 705 in sub-Saharan
African women; HVTN 703/HPTN 081 in sub-Saharan African women; HVTN 704/HPTN
085 in U.S., Pe... | 1906.08409v1 |
2019-08-12 | Elemental Abundances in M31: First Alpha and Iron Abundance Measurements in M31's Giant Stellar Stream | We present the first measurements of [Fe/H] and [$\alpha$/Fe] abundances,
obtained using spectral synthesis modeling, for red giant branch stars in M31's
giant stellar stream. The spectroscopic observations, obtained at a projected
distance of 17 kpc from M31's center, yielded 61 stars with [Fe/H]
measurements, includi... | 1908.04429v1 |
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