Entanglement of a Mesoscopic Field with an Atom induced by Photon Graininess in a Cavity

Details Entanglement of a Mesoscopic Field with an Atom induced by Photon Graininess in a Cavity Entanglement of a Mesoscopic Field with an Atom induced by Photon Graininess in a Cavity

2003-07-25

arxiv.org/abs/quant-ph/0307185v1

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.91.230405

We observe that a mesoscopic field made of several tens of microwave photons exhibits quantum features when interacting with a single Rydberg atom in a high-Q cavity. The field is split into two components whose phases differ by an angle inversely proportional to the square root of the average photon number. The field and the atomic dipole are phase-entangled. These manifestations of photon graininess vanish at the classical limit. This experiment opens the way to studies of large Schrodinger cat states at the quantum-classical boundary.

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