Results 91 to 100 of about 35,406 (311)

Brownian dynamics approach to interacting magnetic moments

, 2002
The question how to introduce thermal fluctuations in the equation of motion of a magnetic system is addressed. Using the approach of the fluctuation-dissipation theorem we calculate the properties of the noise for both, the fluctuating field and ...
Baryakhtar, Boerner, Braun, Brown, Brown, Chantrell, Garanin, Garcia-Palacios, Hinzke, Hinzke, J.M. Gonzalez, Kamppeter, Kanai, Koehler, Kubo, LaBonte, Landau, Lyberatos, Lyberatos, M.A. Wongsam, Nakatani, Nowak, O. Chubykalo, Onsager, R. Smirnov-Rueda, R.W. Chantrell, Safonov, Safonov, Scholz, Smith, U. Nowak, Weller, Wongsam, Yuan, Zhang, Zhang   +35 more
core   +1 more source

Stability of Viscous Three‐Dimensional Stratified Couette Flow via Dispersion and Mixing

Communications on Pure and Applied Mathematics, EarlyView.
ABSTRACT This article explores the stability of stratified Couette flow in the viscous 3d$3d$ Boussinesq equations. In this system, mixing effects arise from the shearing background, and gravity acts as a restoring force leading to dispersive internal gravity waves.
Michele Coti Zelati, Augusto Del Zotto, Klaus Widmayer   +2 more
wiley   +1 more source

Fully covariant radiation force on a polarizable particle

New Journal of Physics, 2013
The electromagnetic force on a polarizable particle is calculated in a covariant framework. Local equilibrium temperatures for the electromagnetic field and the particle's dipole moment are assumed, using a relativistic formulation of the fluctuation ...
Gregor Pieplow, Carsten Henkel
doaj   +1 more source

Universal Thermodynamic Bounds on Nonequilibrium Response with Biochemical Applications

Physical Review X, 2020
Diverse physical systems are characterized by their response to small perturbations. Near thermodynamic equilibrium, the fluctuation-dissipation theorem provides a powerful theoretical and experimental tool to determine the nature of response by ...
Jeremy A. Owen, Todd R. Gingrich, Jordan M. Horowitz   +2 more
doaj   +1 more source

Fluctuation-Dissipation Theorem and Models of Learning

Neural Computation, 2005
Advances in statistical learning theory have resulted in a multitude of different designs of learning machines. But which ones are implemented by brains and other biological information processors? We analyze how various abstract Bayesian learners perform on different data and argue that it is difficult to determine which learning—theoretic computation
openaire   +4 more sources

The Virial Expansion of the Hydrogen Equation of State in Comparison to PIMC Simulations: The Quasiparticle Concept, IPD, and Ionization Degree

Contributions to Plasma Physics, EarlyView.
ABSTRACT The properties of plasmas in the low‐density limit are described by virial expansions. Analytical expressions are known for the lowest virial coefficients from Green's function approaches. Recently, accurate path‐integral Monte Carlo (PIMC) simulations were performed for the hydrogen plasma at low densities by Filinov and Bonitz (Phys. Rev.
Gerd Röpke, Chengliang Lin, W. Ebeling, H. Reinholz   +3 more
wiley   +1 more source

Violation of the Fluctuation Dissipation Theorem in Finite Dimensional Spin Glasses

, 1997
We study the violation of the fluctuation-dissipation theorem in the three and four dimensional Gaussian Ising spin glasses using on and off equilibrium simulations.
, Baldassarri A, Battista C, Bouchaud J-P, Cugliandolo L F, Cugliandolo L F, Enzo Marinari, Federico Ricci-Tersenghi, Franz S, Giorgio Parisi, Hukushima K, Iñiguez D, Juan J Ruiz-Lorenzo, Marinari E, Marinari E, Marinari E, Mezard M, Newman C M, Parisi G, Parisi G, Parisi G, Parisi G, Parisi G   +22 more
core   +3 more sources

Kinetic Contribution to the Arbitrary Order Odd Frequency Moments of the Dynamic Structure Factor

Contributions to Plasma Physics, EarlyView.
ABSTRACT An exact expression is derived for the kinetic contribution to the odd (arbitrary order) frequency moments of the dynamic structure factor via a finite summation that features averages of even (all lower orders) powers of the momentum over the exact momentum distribution.
Panagiotis Tolias, Tobias Dornheim, Jan Vorberger   +2 more
wiley   +1 more source

Dissipative hydrodynamics in superspace

Journal of High Energy Physics, 2018
We construct a Schwinger-Keldysh effective field theory for relativistic hydrodynamics for charged matter in a thermal background using a superspace formalism.
Kristan Jensen, Natalia Pinzani-Fokeeva, Amos Yarom   +2 more
doaj   +1 more source

On the definition of temperature in dense granular media

, 2001
In this Letter we report the measurement of a pseudo-temperature for compacting granular media on the basis of the Fluctuation-Dissipation relations in the aging dynamics of a model system.
A. Barrat, A. Barrat, A. Barrat, A. Barrat, A. Bortz, A. Mehta, Alain Barrat, D. S. Dean, E. Caglioti, G. Parisi, J. J. Brey, J. J. Brey, J.-L. Barrat, L. F. Cugliandolo, L. F. Cugliandolo, L. F. Cugliandolo, M. Nicodemi, S. Krishnamurthy, S. Krishnamurthy, Vittoria Colizza, Vittorio Loreto, W. Kob, W. Kob   +22 more
core   +1 more source