Strong low-frequency quantum correlations from a four-wave mixing amplifier

Details Strong low-frequency quantum correlations from a four-wave mixing amplifier Strong low-frequency quantum correlations from a four-wave mixing amplifier

2007-03-13

arxiv.org/abs/quant-ph/0703111v2

Physics

Quantum Physics

4 pages, 4 figures. Major rewrite of the previous version. New experimental results and further analysis

Scientific paper

10.1103/PhysRevA.78.043816

We show that a simple scheme based on nondegenerate four-wave mixing in a hot atomic vapor behaves like a near-perfect phase-insensitive optical amplifier, which can generate bright twin beams with a measured quantum noise reduction in the intensity difference of more than 8 dB, close to the best optical parametric amplifiers and oscillators. The absence of a cavity makes the system immune to external perturbations, and the strong quantum noise reduction is observed over a large frequency range.

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