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. This entanglement is revealed by a second atom probing, after a delay, the correlations between the two modes. This experiment opens interesting perspectives for quantum information manipulation and fundamental tests of quantum theory.

10 pages, 2 figures

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