Results 21 to 30 of about 120,992 (291)

Work fluctuation theorem for a granular motor [PDF]

open access: yes, 2013
We apply kinetic theory and numerical simulation to the study of the fluctuation theorem for the work performed by an asymmetric piston immersed in a bath of gas particles.
J. Talbot, P. Viot
core   +1 more source

Single-Layer Phase Screen With Pointing Errors for Free Space Optical Communication

open access: yesIEEE Access, 2021
Single-layer phase screen is a classical, simple and accurate approach for simulating the optical field under turbulence, and it is generally used in free space optical communication (FSOC).
Xin Liu   +4 more
doaj   +1 more source

Generalization of the Lindhard dielectric function to include fluctuation effects [PDF]

open access: yes, 1989
The random-phase-approximation dielectric function for the homogeneous electron gas has been derived by Lindhard. Here, we generalize this work to include fluctuation effects, and we also study their influence on the Friedel oscillations.
O\u27Connell, R. F., Hu, G. Y.
core   +1 more source

Stochastic resonance of fractional-order Langevin equation driven by periodic modulated noise with mass fluctuation

open access: yesAdvances in Difference Equations, 2020
The stochastic resonance (SR) of a second-order harmonic oscillator subject to mass fluctuation and periodic modulated noise in viscous media is studied.
Shan Yang, Mou Deng, Ruibin Ren
doaj   +1 more source

P.: Fluctuation theorems: Work is not an observable [PDF]

open access: yes, 2007
The characteristic function of the work performed by an external time-dependent force on a Hamiltonian quantum system is identified with the time-ordered correlation function of the exponentiated system’s Hamil-tonian.
Lutz, Eric   +5 more
core   +1 more source

Collective Behaviors of Star-Coupled Harmonic Oscillators with Fluctuating Frequency in the Presence of Stochastic Resonance

open access: yesFractal and Fractional, 2022
The stochastic resonance (SR) of a star-coupled harmonic oscillator subject to multiplicative fluctuation and periodic force in viscous media is studied.
Ruibin Ren, George X. Yuan
doaj   +1 more source

Work fluctuation theorem for coloured noise driven open systems [PDF]

open access: yes, 2011
We have studied work fluctuation behaviour in the presence of internal thermal noise as well as external coloured noise. The external coloured noise may have both Gaussian or non-Gaussian characteristics.
A. Baura   +4 more
core   +1 more source

Superfluid density, Josephson relation and pairing fluctuations in a multi-component fermion superfluid

open access: yesScientific Reports, 2021
In this work, a Josephson relation is generalized to a multi-component fermion superfluid. Superfluid density is expressed through a two-particle Green function for pairing states.
Yi-Cai Zhang
doaj   +1 more source

Jarzynski Equality for Driven Quantum Field Theories

open access: yesPhysical Review X, 2018
The fluctuation theorems, and in particular, the Jarzynski equality, are the most important pillars of modern nonequilibrium statistical mechanics.
Anthony Bartolotta, Sebastian Deffner
doaj   +1 more source

Variational approach to KPZ: Fluctuation theorems and large deviation function for entropy production [PDF]

open access: yes, 2020
We dedicate this work to the memory of Professor Enrique Tirapegui, a great physicist and best friend.Motivated by the time behavior of the functional arising in the variational approach to the Kardar-Parisi-Zhang (KPZ) equation, and in order to study ...
Wio, Horacio S.   +8 more
core   +1 more source

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