Proposal for realization of a Toffoli gate via cavity-assisted atomic collision

Authors:
Harold Ollivier;Perola Milman
Affiliations:
INRIA, Le Chesnay cedex, France and Los Alamos National Laboratory, Los Alamos, New Mexico;Laboratoire Kastler Brossel, Département de Physique de l'Ecole Normale Supérieure, Paris Cedex 05, France and Collège de France, Paris, France
Venue:
Quantum Information & Computation
Year:
2003

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Abstract

Cavity QED is a versatile tool to explore small scale quantum information processing. Within this setting, we describe a particular protocol for implementing a Toffoli gate with Rydberg atoms and a cavity field. Our scheme uses both resonant and non resonant interactions, and in particular a cavity-assisted atomic collision. The experimental feasibility of the protocol is carefully analyzed with the help of numerical simulations and takes into account the decoherence process. Moreover, we show that our protocol is optimal within the constraints imposed by the experimental setting.