Work and energy gain of heat-pumped quantized amplifiers
1 Weizmann Institute of Science - 76100 Rehovot, Israel
2 Institute of Theoretical Physics and Astrophysics, University of Gdańsk - PL-80952 Gdansk, Poland, EU
Received: 4 August 2013
Accepted: 14 September 2013
We investigate heat-pumped single-mode amplifiers of quantized fields in high-Q cavities based on noninverted two-level systems. Their power generation is shown to crucially depend on the capacity of the quantum state of the field to accumulate useful work. By contrast, the energy gain of the field is shown to be insensitive to its quantum state. Analogies and differences with masers are explored.
PACS: 03.65.Yz – Decoherence; open systems; quantum statistical methods / 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 05.30.-d – Quantum statistical mechanics
© EPLA, 2013