Compact Source of EPR Entanglement and Squeezing at Very Low Noise Frequencies

Details Compact Source of EPR Entanglement and Squeezing at Very Low Noise Frequencies Compact Source of EPR Entanglement and Squeezing at Very Low Noise Frequencies

2004-03-30

arxiv.org/abs/quant-ph/0403224v2

Physical Review A 70 (2004) 042315

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.70.042315

We report on the experimental demonstration of strong quadrature EPR entanglement and squeezing at very low noise sideband frequencies produced by a single type-II, self-phase-locked, frequency degenerate optical parametric oscillator below threshold. The generated two-mode squeezed vacuum state is preserved for noise frequencies as low as 50 kHz. Designing simple setups able to generate non-classical states of light in the kHz regime is a key challenge for high sensitivity detection of ultra-weak physical effects such as gravitational wave or small beam displacement.

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