Vacuum-induced Stark shifts for quantum logic using a collective system in a high-quality dispersive cavity

A. Gábris, G. S. Agarwal

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

A collective system of atoms in a high-quality cavity can be described by a nonlinear interaction which arises due to the Lamb shift of the energy levels due to the cavity vacuum [Agarwal, Phys. Rev. A 56, 2249 (1997)]. We show how this collective interaction can be used to perform quantum logic. In particular we produce schemes to realize controlled-NOT gates not only for two-qubit but also for three-qubit systems. We also discuss realizations of Toffoli gates. Our effective Hamiltonian is also realized in other systems such as trapped ions or magnetic molecules.

Original languageEnglish
Article number052316
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume71
Issue number5
DOIs
Publication statusPublished - May 1 2005

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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