Bosonic Szilard engine assisted by Feshbach resonances
(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.
(Less)
- author
- Bengtsson, J. LU ; Tengstrand, M. Nilsson LU and Reimann, S. M. LU
- organization
- publishing date
- 2018-06-29
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review A
- volume
- 97
- issue
- 6
- article number
- 062128
- publisher
- American Physical Society
- 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
- 2023-09-22 04:45:51
@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>}}, author = {{Bengtsson, J. and Tengstrand, M. Nilsson and Reimann, S. M.}}, issn = {{2469-9926}}, language = {{eng}}, month = {{06}}, number = {{6}}, publisher = {{American Physical Society}}, series = {{Physical Review A}}, title = {{Bosonic Szilard engine assisted by Feshbach resonances}}, url = {{http://dx.doi.org/10.1103/PhysRevA.97.062128}}, doi = {{10.1103/PhysRevA.97.062128}}, volume = {{97}}, year = {{2018}}, }