Results 71 to 80 of about 35,406 (311)

The Fluctuation Theorem and Its Practical Limitations: A Numerical Example

open access: yesDynamics
The Fluctuation Theorem establishes a relationship between microscopic reversibility and macroscopic irreversible phenomena, such as dissipation. In this short paper, we present an elementary derivation of this theorem within the framework of stochastic ...
Fernando C. Pérez-Cárdenas
doaj   +1 more source

Driven Soft Matter: Entropy Production and the Fluctuation-Dissipation Theorem

open access: yes, 2010
Entropy and the fluctuation-dissipation theorem are at the heart of statistical mechanics near equilibrium. Driving a system beyond the linear response regime leads to (i) the breakdown of the fluctuation-dissipation theorem and (ii) a nonzero entropy ...
Speck, Thomas
core   +1 more source

Intermittent origin of the large violations of the fluctuation dissipation relations in an aging polymer glass [PDF]

open access: yes, 2003
The fluctuation-dissipation relation (FDR) is measured on the dielectric properties of a polymer glass (polycarbonate)in the range $20mHz - 100Hz$. It is found that after a quench below the glass transition temperature the fluctuation dissipation theorem
A Garcimartín   +13 more
core   +2 more sources

Complexity Analysis of Bubble Plumes in Power Law Fluids Based on Chaos Theory

open access: yesAsia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT In order to reveal the complexity of the internal flow of bubble plume in power law fluid, the flow characteristics and chaotic characteristics of plume are studied by experiment and theory. The chaotic characteristic parameters (correlation dimension D, K entropy, and Lyapunov exponent λ) of gas velocity under different superficial gas ...
Xin Dong   +6 more
wiley   +1 more source

Aging and fluctuation-dissipation ratio in a nonequilibrium $q$-state lattice model

open access: yes, 2010
A generalized version of the nonequilibrium linear Glauber model with $q$ states in $d$ dimensions is introduced and analyzed. The model is fully symmetric, its dynamics being invariant under all permutations of the $q$ states.
de Oliveira, M. J.   +2 more
core   +1 more source

Off equilibrium fluctuations in a polymer glass [PDF]

open access: yes, 2005
The fluctuation-dissipation relation (FDR) is measured on the dielectric properties a polymer glass (polycarbonate). It is observed that the fluctuation dissipation theorem is strongly violated for a quench from above to below the glass transition ...
Barrat   +35 more
core   +3 more sources

Work Versus Force: Simultaneous Processes for Describing Interactions

open access: yesAdvanced Physics Research, EarlyView.
ABSTRACT Achieving a unified description of interactions remains an open challenge in theoretical physics, which currently describes four fundamental forces. This situation may be viewed differently when interactions are formulated in terms of processes (work as actio) rather than forces (force as actio), not only at the macroscopic level but also at ...
Grit Kalies   +2 more
wiley   +1 more source

Many-body correlations in the kinetic theory of solids

open access: yesMoldavian Journal of the Physical Sciences, 2009
Multiquantum integral kinetic equations for the micropolarization and longitudinal di- electric function are derived with account of pair correlations.
Cliucanov, Alexandr
doaj  

Effective action for relativistic hydrodynamics: fluctuations, dissipation, and entropy inflow

open access: yesJournal of High Energy Physics, 2018
We present a detailed and self-contained analysis of the universal SchwingerKeldysh effective field theory which describes macroscopic thermal fluctuations of a relativistic field theory, elaborating on our earlier construction [1]. We write an effective
Felix M. Haehl   +2 more
doaj   +1 more source

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