## Abstract

We consider heat transfer across an arbitrary classical harmonic network connected to two heat baths at different temperatures. The network has N positional degrees of freedom, of which N_{L} are connected to a bath at temperature T_{L} and N_{R} are connected to a bath at temperature T_{R}. We derive an exact formula for the cumulant generating function for heat transfer between the two baths. The formula is valid even for N_{L}=N_{R} and satisfies the Gallavotti-Cohen fluctuation symmetry. Since harmonic crystals in three dimensions are known to exhibit different regimes of transport such as ballistic, anomalous, and diffusive, our result implies validity of the fluctuation theorem in all regimes. Our exact formula provides a powerful tool to study other properties of nonequilibrium current fluctuations.

Original language | English |
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Article number | 041121 |

Journal | Physical Review E - Statistical, Nonlinear, and Soft Matter Physics |

Volume | 83 |

Issue number | 4 |

DOIs | |

Publication status | Published - 2011 Apr 21 |

Externally published | Yes |

## ASJC Scopus subject areas

- Statistical and Nonlinear Physics
- Statistics and Probability
- Condensed Matter Physics