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Phys. Rev. B 80, 144508 (2009) [4 pages]

Cooling a micromechanical resonator by quantum back-action from a noisy qubit

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Ying-Dan Wang1,2, Yong Li2,3, Fei Xue4, C. Bruder2, and K. Semba1
1NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
2Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland
3Department of Physics, University of Hong Kong, Pokfulam Road, Hong Kong, China
4Department of Electrical Engineering, Technion, Haifa 32000, Israel

Received 4 August 2009; published 6 October 2009

We study the role of qubit dephasing in cooling a mechanical resonator by quantum back-action. With a superconducting flux qubit as a specific example, we show that ground-state cooling of a mechanical resonator can only be realized if the qubit dephasing rate is sufficiently low.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.80.144508
DOI:
10.1103/PhysRevB.80.144508
PACS:
85.85.+j, 45.80.+r, 85.25.Cp
 
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