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- W2109100721 abstract "We perform a quantum-mechanical analysis of the pendular cavity, using the positive-$P$ representation, showing that the quantum state of the moving mirror, a macroscopic object, has noticeable effects on the dynamics. This system has previously been proposed as a candidate for the quantum-limited measurement of small displacements of the mirror due to radiation pressure, for the production of states with entanglement between the mirror and the field, and even for superposition states of the mirror. However, when we treat the oscillating mirror quantum mechanically, we find that it always oscillates, has no stationary steady state, and exhibits uncertainties in position and momentum which are typically larger than the mean values. This means that previous linearized fluctuation analyses which have been used to predict these highly quantum states are of limited use. We find that the achievable accuracy in measurement is far worse than the standard quantum limit due to thermal noise, which, for typical experimental parameters, is overwhelming even at $2phantom{rule{0.3em}{0ex}}mathrm{mK}$" @default.
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- W2109100721 title "Quantum phase-space analysis of the pendular cavity" @default.
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- W2109100721 doi "https://doi.org/10.1103/physreva.70.043815" @default.
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