Narrowband frequency tunable light source of continuous quadrature entanglement

Details Narrowband frequency tunable light source of continuous quadrature entanglement Narrowband frequency tunable light source of continuous quadrature entanglement

2002-05-03

arxiv.org/abs/quant-ph/0205015v2

Physics

Quantum Physics

11 pages, 9 figures, LaTeX

Scientific paper

10.1103/PhysRevA.66.033802

We report the observation of non-classical quantum correlations of continuous light variables from a novel type of source. It is a frequency non-degenerate optical parametric oscillator below threshold, where signal and idler fields are separated by 740MHz corresponding to two free spectrum ranges of the parametric oscillator cavity. The degree of entanglement observed, - 3.8 dB, is the highest to-date for a narrowband tunable source suitable for atomic quantum memory and other applications in atomic physics. Finally we use the latter to visualize the Einstein-Podolsky-Rosen paradox.

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