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Proceedings Paper

Quantum Rabi oscillation in a mesoscopic field: when fluctuations produce entanglement and Schroedinger cat states
Author(s): Gilles Nogues; Alexia Auffeves; Paolo Maioli; Tristan Meunier; Sebastien Gleyzes; Michel Brune; Jean-Michel Raimond; Serge Haroche
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Paper Abstract

Quantum Rabi oscillation in cavity quantum electrodynamics is at the very heart of the interaction of an atomic system with a single electromagnetic field in a resonator. It has proved a powerful tool to entangle the atom with the field in the case of an empty cavity (vacuum Rabi oscillation). On the other side, as soon as the field is macroscopic, its state seems unaffected and one observes the well-known phenomenon of classical Rabi oscillation which only affects the atomic populations. We propose to experimentally investigate the frontier between those two behaviours, when one has to take into account the fluctations of the photon number. In order to do so, we let interact circular Rydberg atoms with a microwave resonator in which a mesocopic field is injected (a few tens of photons). We observe a strong correlation between specific atomic states and the phase of the injected field, which is measured by a homodyne technique. Those correlations explain in an easy way all the standard features of quantum Rabi oscillations (especially the collapses and revivals). Moreover they allow for the preparation of atom-field entangled state as well as non classical Schroedinger cat like states for the field.

Paper Details

Date Published: 25 May 2004
PDF: 9 pages
Proc. SPIE 5468, Fluctuations and Noise in Photonics and Quantum Optics II, (25 May 2004); doi: 10.1117/12.547003
Show Author Affiliations
Gilles Nogues, Lab. Kastler Brossel/Ecole Normale Superieure (France)
Alexia Auffeves, Lab. Kastler Brossel/Ecole Normale Superieure (France)
Paolo Maioli, Lab. Kastler Brossel/Ecole Normale Superieure (France)
Tristan Meunier, Lab. Kastler Brossel/Ecole Normale Superieure (France)
Sebastien Gleyzes, Lab. Kastler Brossel/Ecole Normale Superieure (France)
Michel Brune, Lab. Kastler Brossel/Ecole Normale Superieure (France)
Jean-Michel Raimond, Lab. Kastler Brossel/Ecole Normale Superieure (France)
Serge Haroche, Lab. Kastler Brossel/Ecole Normale Superieure (France)
Collège de France (France)


Published in SPIE Proceedings Vol. 5468:
Fluctuations and Noise in Photonics and Quantum Optics II
Peter Heszler, Editor(s)

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