Quantum analysis of a linear DC SQUID mechanical displacement detector
arXiv:0704.0457 · doi:10.1103/PhysRevB.76.014511
Abstract
We provide a quantum analysis of a DC SQUID mechanical displacement detector within the sub-critical Josephson current regime. A segment of the SQUID loop forms the mechanical resonator and motion of the latter is transduced inductively through changes in the flux threading the loop. Expressions are derived for the detector signal response and noise, which are used to evaluate the position and force detection sensitivity. We also investigate cooling of the mechanical resonator due to back reaction noise from the detector.
33 pages, 4 figures, published version
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