title: Quantum heat engines and nonequilibrium temperature.
abstract: A pair of two-level systems initially prepared in different thermal states and coupled to an external reversible work source do not in general reach a common temperature at the end of a unitary work extraction process. We define an effective temperature for the final nonequilibrium but passive state of the bipartite quantum system and analyze its properties.
authors.affiliation: Department of Physics, Indian Institute of Science Education and Research Mohali, Transit Campus, MGSIPA Complex, Sector 26, Chandigarh 160019, India.
authors.forename: Ramandeep S
authors.initials: RS
authors.lastname: Johal