Suppression of Classical and Quantum Radiation Pressure Noise via Electro-Optic Feedback

Details Suppression of Classical and Quantum Radiation Pressure Noise via Electro-Optic Feedback Suppression of Classical and Quantum Radiation Pressure Noise via Electro-Optic Feedback

1998-11-05

arxiv.org/abs/quant-ph/9811014v2

Physics

Quantum Physics

4 pages, 1 figure

Scientific paper

10.1364/OL.24.000259

We present theoretical results that demonstrate a new technique to be used to improve the sensitivity of thermal noise measurements: intra-cavity intensity stabilisation. It is demonstrated that electro-optic feedback can be used to reduce intra-cavity intensity fluctuations, and the consequent radiation pressure fluctuations, by a factor of two below the quantum noise limit. We show that this is achievable in the presence of large classical intensity fluctuations on the incident laser beam. The benefits of this scheme are a consequence of the sub-Poissonian intensity statistics of the field inside a feedback loop, and the quantum non-demolition nature of radiation pressure noise as a readout system for the intra-cavity intensity fluctuations.

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