Circuit cavity electromechanics in the strong-coupling regime

J. D. Teufel (), Dale Li, M. S. Allman, K. Cicak, A. J. Sirois, J. D. Whittaker and R. W. Simmonds
Additional contact information
J. D. Teufel: National Institute of Standards and Technology, 325 Broadway
Dale Li: National Institute of Standards and Technology, 325 Broadway
M. S. Allman: National Institute of Standards and Technology, 325 Broadway
K. Cicak: National Institute of Standards and Technology, 325 Broadway
A. J. Sirois: National Institute of Standards and Technology, 325 Broadway
J. D. Whittaker: National Institute of Standards and Technology, 325 Broadway
R. W. Simmonds: National Institute of Standards and Technology, 325 Broadway

Nature, 2011, vol. 471, issue 7337, 204-208

Abstract: Quantum states with a prolonged life The drive towards observing quantum effects in macroscopic mechanical systems could lead to new insights in quantum-limited measurements and help to test fundamental questions regarding the impossible consequences of quantum physics at a macroscopic scale. To obtain sufficiently long-lived mechanical states, the usual approach is to couple a mechanical oscillator to an electromagnetic resonance in a cavity. Teufel et al. present a new design for such a system in which a free-standing flexible aluminium membrane (like a drum) is incorporated in a cavity defined by a superconducting circuit, and which demonstrates a coupling strength that is two orders of magnitude higher than that achieved before. The approach shows the way to observing long-lived quantum states that could survive for hundreds of microseconds.

Date: 2011
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DOI: 10.1038/nature09898

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