Quantum phase-space analysis of the pendular cavity

Olsen, M. K., Melo, A. B., Dechoum, K. and Khoury, A. Z. (2004) Quantum phase-space analysis of the pendular cavity. Physical Review A, 70 4: . doi:10.1103/PhysRevA.70.043815

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Author Olsen, M. K.
Melo, A. B.
Dechoum, K.
Khoury, A. Z.
Title Quantum phase-space analysis of the pendular cavity
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2004-10
Sub-type Article (original research)
DOI 10.1103/PhysRevA.70.043815
Open Access Status File (Publisher version)
Volume 70
Issue 4
Total pages 11
Editor B. Crasemann
Place of publication New York
Publisher American Physical Society
Language eng
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 fat, worse than the standard quantum limit due to thermal noise, which, for typical experimental parameters, is overwhelming even at 2 mK
Keyword Optics
Physics, Atomic, Molecular & Chemical
Radiation Pressure
Brownian-motion
Noise Reduction
Moving Mirror
Oscillators
Position
Limits
Q-Index Code C1

 
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Created: Mon, 13 Aug 2007, 14:45:28 EST