Bosonic Szilard engine assisted by Feshbach resonances

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Abstract

It was recently found that the information-to-work conversion in a quantum Szilard engine can be increased by using a working medium of bosons with attractive interactions. In the original scheme, the work output depends on the insertion and removal position of an impenetrable barrier that acts like a piston, separating the chambers of the engine. Here, we show that the barrier removal process can be made fully reversible, resulting in a full information-to-work conversion if we also allow for the interaction strength to change during the cycle. Hence, it becomes possible to reach the maximum work output per cycle dictated by the second law of thermodynamics. These findings can be experimentally verified, for instance, with ultracold atoms as a working medium, where a change of interaction strength can be controlled by Feshbach resonances.

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  • Other Physics Topics
Original languageEnglish
Article number062128
JournalPhysical Review A
Volume97
Issue number6
Publication statusPublished - 2018 Jun 29
Publication categoryResearch
Peer-reviewedYes