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Cooling a micromechanical resonator to its ground state by measurement and feedback

Bergenfeldt, Christian LU and Molmer, Klaus (2009) In Physical Review A (Atomic, Molecular and Optical Physics) 80(4).
Abstract
We present an analysis of the cooling of a micromechanical resonator by means of measurement and feedback. The measurements are performed via the coupling to a Cooper-pair box, and although the coupling does not lead to net cooling, the extraction of information and hence entropy from the system leads to a pure quantum state. Under suitable circumstances, the states become very close to coherent states, conditioned on the measurement record, and can hence be displaced to the oscillator ground state.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
resonators, micromechanical, ground states, entropy, cooling, Cooper pairs, quantum theory
in
Physical Review A (Atomic, Molecular and Optical Physics)
volume
80
issue
4
publisher
American Physical Society (APS)
external identifiers
  • wos:000271351000194
  • scopus:70350576640
ISSN
1050-2947
DOI
10.1103/PhysRevA.80.043838
language
English
LU publication?
yes
id
ee43cfc6-6cdb-4f83-a0c6-e60198bf26d5 (old id 1504817)
date added to LUP
2009-11-25 09:07:54
date last changed
2017-01-01 04:20:39
@article{ee43cfc6-6cdb-4f83-a0c6-e60198bf26d5,
  abstract     = {We present an analysis of the cooling of a micromechanical resonator by means of measurement and feedback. The measurements are performed via the coupling to a Cooper-pair box, and although the coupling does not lead to net cooling, the extraction of information and hence entropy from the system leads to a pure quantum state. Under suitable circumstances, the states become very close to coherent states, conditioned on the measurement record, and can hence be displaced to the oscillator ground state.},
  author       = {Bergenfeldt, Christian and Molmer, Klaus},
  issn         = {1050-2947},
  keyword      = {resonators,micromechanical,ground states,entropy,cooling,Cooper pairs,quantum theory},
  language     = {eng},
  number       = {4},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {Cooling a micromechanical resonator to its ground state by measurement and feedback},
  url          = {http://dx.doi.org/10.1103/PhysRevA.80.043838},
  volume       = {80},
  year         = {2009},
}