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Bosonic Szilard engine assisted by Feshbach resonances

Bengtsson, J. LU ; Tengstrand, M. Nilsson LU and Reimann, S. M. LU (2018) In Physical Review A 97(6).
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... (More)

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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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A
volume
97
issue
6
publisher
American Physical Society (APS)
external identifiers
  • scopus:85049384124
ISSN
2469-9926
DOI
10.1103/PhysRevA.97.062128
language
English
LU publication?
yes
id
40e5dfa9-1c09-4ec2-b2b8-af3682fac6f7
date added to LUP
2018-07-13 14:00:01
date last changed
2018-07-13 14:00:01
@article{40e5dfa9-1c09-4ec2-b2b8-af3682fac6f7,
  abstract     = {<p>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.</p>},
  articleno    = {062128},
  author       = {Bengtsson, J. and Tengstrand, M. Nilsson and Reimann, S. M.},
  issn         = {2469-9926},
  language     = {eng},
  month        = {06},
  number       = {6},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A},
  title        = {Bosonic Szilard engine assisted by Feshbach resonances},
  url          = {http://dx.doi.org/10.1103/PhysRevA.97.062128},
  volume       = {97},
  year         = {2018},
}