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Hybrid Microwave-Cavity Heat Engine

Bergenfeldt, Christian LU ; Samuelsson, Peter LU ; Sothmann, Bjoern; Flindt, Christian and Buettiker, Markus (2014) In Physical Review Letters 112(7).
Abstract
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 efficiency with optimal conversion of heat to work. When the system delivers the maximum power, the efficiency can be a large fraction of the Carnot efficiency. 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... (More)
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 efficiency with optimal conversion of heat to work. When the system delivers the maximum power, the efficiency can be a large fraction of the Carnot efficiency. 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. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
112
issue
7
publisher
American Physical Society
external identifiers
  • wos:000331953300027
  • pmid:24579624
  • scopus:84894805730
ISSN
1079-7114
DOI
10.1103/PhysRevLett.112.076803
language
English
LU publication?
yes
id
f30d8d1d-1f81-45f3-bc76-1618fbc6d900 (old id 4367306)
date added to LUP
2014-04-23 13:23:08
date last changed
2017-11-12 03:05:51
@article{f30d8d1d-1f81-45f3-bc76-1618fbc6d900,
  abstract     = {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 efficiency with optimal conversion of heat to work. When the system delivers the maximum power, the efficiency can be a large fraction of the Carnot efficiency. 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.},
  articleno    = {076803},
  author       = {Bergenfeldt, Christian and Samuelsson, Peter and Sothmann, Bjoern and Flindt, Christian and Buettiker, Markus},
  issn         = {1079-7114},
  language     = {eng},
  number       = {7},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Hybrid Microwave-Cavity Heat Engine},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.112.076803},
  volume       = {112},
  year         = {2014},
}