Fluctuation formula for nonreversible dynamics in the thermostated Lorentz gas

Details Fluctuation formula for nonreversible dynamics in the thermostated Lorentz gas Fluctuation formula for nonreversible dynamics in the thermostated Lorentz gas

2001-06-05

arxiv.org/abs/nlin/0106005v2

Phys. Rev. E 66, 066217 (2002)

Nonlinear Sciences

Chaotic Dynamics

6 pages, 6 figures

Scientific paper

10.1103/PhysRevE.66.066217

We investigate numerically the validity of the Gallavotti-Cohen fluctuation formula in the two and three dimensional periodic Lorentz gas subjected to constant electric and magnetic fields and thermostated by the Gaussian isokinetic thermostat. The magnetic field breaks the time reversal symmetry, and by choosing its orientation with respect to the lattice one can have either a generalized reversing symmetry or no reversibility at all. Our results indicate that the scaling property described by the fluctuation formula may be approximately valid for large fluctuations even in the absence of reversibility.

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