Cooling a micromechanical resonator to its ground state by measurement and feedback
Journal Article
·
· Physical Review. A
- Department of Physics, Lund University, P.O. Box 118, 22100 Lund (Sweden)
- Lundbeck Foundation Center for Theoretical Quantum System Research, Department of Physics and Astronomy, Aarhus University, DK 8000 Aarhus C (Denmark)
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.
- OSTI ID:
- 21316504
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 80; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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