Time-dependent study of bit reset
NiPS Laboratory, Dipartimento di Fisica, Università degli Studi di Perugia - Via Alessandro Pascoli, I-06123 Perugia, Italy
Received: 1 December 2014
Accepted: 19 January 2015
In its most conservative formulation, the Landauer principle states that at least of heat must be produced to reset one bit. Theoretical derivations of this result for practical systems require complex mathematical tools; additionally, real experiments are sophisticated and sensitive. In the literature, it's then common practice to look for a global heat production of without further concern for heat exchanges at intermediate times. In this paper we want to recover such kind of description: we take a Brownian particle that moves in a bistable potential as bit. We then consider a reset protocol with a net heat production of and study the time evolution of internal energy, work and heat. In particular, we show that these quantities are fully characterized by the changes that the protocol induces over the wells of the bistable potential.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 05.10.Gg – Stochastic analysis methods (Fokker-Planck, Langevin, etc.) / 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion
© EPLA, 2015