We study current fluctuations in lattice gases in the macroscopic limit extending the dynamic approach for density fluctuations developed in previous articles. More precisely, we establish a large deviation theory for the space-time fluctuations of the empirical current which include the previous results. We then estimate the probability of a fluctuation of the average current over a large time interval. It turns out that recent results by Bodineau and Derrida [Phys. Rev. Lett. 92, 180601 (2004)]] in certain cases underestimate this probability due to the occurrence of dynamical phase transitions.
Current fluctuations in stochastic lattice gases.
L. Bertini,A. Sole,D. Gabrielli,G. Jona-Lasinio,C. Landim
Published 2004 in Physical Review Letters
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- Publication year
2004
- Venue
Physical Review Letters
- Publication date
2004-07-07
- Fields of study
Medicine, Physics
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Semantic Scholar, PubMed
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