Quantum interference of ultrastable twin optical beams

Details Quantum interference of ultrastable twin optical beams Quantum interference of ultrastable twin optical beams

2003-09-30

arxiv.org/abs/quant-ph/0310002v2

Phys. Rev. Lett. 92, 203601 (2004)

Physics

Quantum Physics

4 pages, 4 figs, accepted by Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.92.203601

We report the first measurement of the quantum phase-difference noise of an ultrastable nondegenerate optical parametric oscillator that emits twin beams classically phase-locked at exact frequency degeneracy. The measurement illustrates the property of a lossless balanced beam-splitter to convert number-difference squeezing into phase-difference squeezing and, thus, provides indirect evidence for Heisenberg-limited interferometry using twin beams. This experiment is a generalization of the Hong-Ou-Mandel interference effect for continuous variables and constitutes a milestone towards continuous-variable entanglement of bright, ultrastable nondegenerate beams.

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