Controlled entanglement of two field modes in a cavity quantum electrodynamics experiment

Abstract
Using a single circular Rydberg atom, we have prepared two modes of a superconducting cavity in a maximally entangled state. The two modes share a single photon. The entanglement is revealed by a second atom probing the correlations between the two modes after a delay. This experiment opens interesting perspectives for quantum information manipulation and fundamental tests of quantum theory. DOI: http://dx.doi.org/10.1103/PhysRevA.64.050301 © 2001 The American Physical Society
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