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Squeezing more from a quantum nondemolition measurement
2001
Physical Review A. Atomic, Molecular, and Optical Physics
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We use a stable, 5 dB, amplitude squeezed source for a quantum nondemolition ͑QND͒ experiment. The performance of our QND system is enhanced by an electro-optic feedforward loop which improves the signal transfer efficiency. At best, we measure a total signal transfer of 1.81 and conditional variance of 0.55.
doi:10.1103/physreva.65.011803
fatcat:mra74a2kmbg6zfmjyoo5q4ffnm