Cooling a micromechanical resonator to its ground state by measurement and feedback
(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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1504817
- author
- Bergenfeldt, Christian LU and Molmer, Klaus
- organization
- publishing date
- 2009
- 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
- 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
- 2016-04-01 11:34:32
- date last changed
- 2022-02-25 18:23:45
@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}}, keywords = {{resonators; micromechanical; ground states; entropy; cooling; Cooper pairs; quantum theory}}, language = {{eng}}, number = {{4}}, publisher = {{American Physical Society}}, 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}}, doi = {{10.1103/PhysRevA.80.043838}}, volume = {{80}}, year = {{2009}}, }