"NANOPOWER: Nanoscale energy management for powering ICT devices" acknowledges the financial support of the Future and Emerging Technologies (FET) programme within the ICT theme of the Seventh Framework Programme for Research of the European Commission (Grant Agreement n. 256959).

Hybrid Microwave Cavity Heat Engine

TitleHybrid Microwave Cavity Heat Engine
Publication TypeJournal Article
Year of Publication2013
AuthorsC., Bergenfeldt, S. Peter, B. Sothmann, C. Flindt, and M. Buttiker
Date Published07/2013
Other NumbersPACS numbers: 73.23.Hk, 73.50.Lw, 73.63.-b

We propose and analyze the use of hybrid microwave cavities as quantum heat engines. A possible
realization consists of two macroscopically separated quantum dot conductors coupled capacitively
to the fundamental mode of a microwave cavity. We demonstrate that an electrical current can be
induced in one conductor through cavity-mediated processes by heating up the other conductor. The
heat engine can reach Carnot eciency with optimal conversion of heat to work. When the system
delivers the maximum power, the eciency can be a large fraction of the Carnot eciency. The heat
engine functions even with moderate electronic relaxation and dephasing in the quantum dots. We
provide detailed estimates for the electrical current and output power using realistic parameters.