title: Heat fluctuations in Brownian transducers.
abstract: The heat fluctuation probability distribution function in Brownian transducers operating between two heat reservoirs is studied. We find, both analytically and numerically, that the recently proposed fluctuation theorem for heat exchange [C. Jarzynski and D. K. Wojcik, Phys. Rev. Lett. 92, 230602 (2004)] has to be applied carefully when the coupling mechanism between both baths is considered. We also conjecture how to extend such a relation when an external work is present.
authors.affiliation: Departament d'Estructura i Constituents de la Materia, Facultat de Fisica, Universitat de Barcelona, Diagonal 647, 08028 Barcelona, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Gomez-Marin
authors.forename: J M
authors.initials: JM
authors.lastname: Sancho