Eur. Phys. J. D (2014) 68: 251
https://doi.org/10.1140/epjd/e2014-50225-1

Regular Article

Dynamical evolutions and coherences in a quantum heat engine

¹ Department of Mathematics, Al-Azhar University, Faculty of Science (Women’s Section), P.O. Box 11754, Nasr City, Cairo, Egypt
² IQSE, Texas A&M University, College Station, TX 77843-4242, USA

^a e-mail: kie_osman@hotmail.com
^b e-mail: mcbamji@gmail.com

Received: 18 March 2014
Received in final form: 13 May 2014
Published online: 18 September 2014

Abstract

The effect of spontaneously generated coherence (SGC) on the quantum heat engine (QHE) consisting of a laser system is studied in terms of its dynamical evolution and the generation of coherences. The QHE is coupled to the two thermal photon reservoirs, a squeezed thermal bath as well as to a cavity mode. The coherence associated with the transition interacting with squeezed reservoir and the average thermal photon number of the hot (as well as cold) reservoir shows a non monotonous behavior between them. The dynamics along with generated coherences of the system and the laser power emitted depend sensitively on the hot, cold and squeezed reservoir parameters.