title: Unattainability of carnot efficiency in the brownian heat engine
abstract: We discuss the reversibility of the Brownian heat engine. We perform an asymptotic analysis of the Kramers equation on a Buttiker-Landauer system and show quantitatively that Carnot efficiency is unattainable even in the fully overdamped limit. The unattainability is attributed to inevitable irreversible heat flow over the temperature boundary.
authors: Department of Physics, Tohoku University, Sendai 980-8578, Japan.
authors: T
authors: Hondou
authors: K
authors: Sekimoto