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EnglishWe study current ßuctuations in lattice gases in the macroscopic limit extending the dynamic approach for density ßuctuations developed in previous articles. More precisely, we establish a large deviation theory for the space-time ßuctuations of the empirical current which include the previous results. We then estimate the probability of a ßuctuation 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
http://hdl.handle.net/11697/1174| Titolo: | Current fluctuations in stochastic lattice gases |
| Autori interni: | GABRIELLI, DAVIDE |
| Data di pubblicazione: | 2005 |
| Rivista: | PHYSICAL REVIEW LETTERS |
| Abstract: | We study current ßuctuations in lattice gases in the macroscopic limit extending the dynamic approach for density ßuctuations developed in previous articles. More precisely, we establish a large deviation theory for the space-time ßuctuations of the empirical current which include the previous results. We then estimate the probability of a ßuctuation 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 |
| Handle: | http://hdl.handle.net/11697/1174 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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