Quantum interference of ultrastable twin optical beams

Sheng Feng; Olivier Pfister

doi:10.1103/PhysRevLett.92.203601

Quantum interference of ultrastable twin optical beams

Quantum Physics 2009-11-10 v2

Authors: Sheng Feng , Olivier Pfister

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Abstract

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.

Keywords

hong-ou-mandel interference interferometry quantum sensing and metrology

Cite

@article{arxiv.quant-ph/0310002,
  title  = {Quantum interference of ultrastable twin optical beams},
  author = {Sheng Feng and Olivier Pfister},
  journal= {arXiv preprint arXiv:quant-ph/0310002},
  year   = {2009}
}

Comments

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

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