Generation of EPR-entangled radiation through an atomic reservoir

Details Generation of EPR-entangled radiation through an atomic reservoir Generation of EPR-entangled radiation through an atomic reservoir

2007-01-25

arxiv.org/abs/quant-ph/0701182v2

Phys. Rev. Lett. 98, 240401 (2007).

Physics

Quantum Physics

4 pages, 3 figures, final version, to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.98.240401

We propose a scheme for generating two-mode squeezing in high-Q resonators using a beam of atoms with random arrival times, which acts as a reservoir for the field. The scheme is based on four-wave mixing processes leading to emission into two cavity modes, which are resonant with the Rabi sidebands of the atomic dipole transition, driven by a saturating classical field. At steady state the cavity modes are in an Einstein-Podolski-Rosen (EPR) state, whose degree of entanglement is controlled by the intensity and the frequency of the transverse field. This scheme is robust against stochastic fluctuations in the atomic beam, does not require atomic detection nor velocity selection, and can be realized by presently available experimental setups with microwave resonators.

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