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

Source: Phys. Rev. B 80, 144508 (2009); doi:10.1103/PhysRevB.80.144508

Published 6 October 2009

KEYWORDS and PACS
Keywords
PACS
  • 85.85.+j
    Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
  • 45.80.+r
    Control of mechanical systems
  • 85.25.Cp
    Josephson devices
  • YEAR: 2009
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PUBLICATION DATA
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Ying-Dan Wang,1,2 Yong Li,2,3 Fei Xue,4 C. Bruder,2 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
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
History: Received 4 August 2009; published 6 October 2009
Permalink: http://link.aps.org/abstract/PRB/v80/e144508

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