Quantum-state protection in cavities

D. Vitali, P. Tombesi, and G. J. Milburn
Phys. Rev. A 57, 4930 – Published 1 June 1998
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Abstract

We show how an initially prepared quantum state of a radiation mode in a cavity can be preserved for a long time using a feedback scheme based on the injection of appropriately prepared atoms. We present a feedback scheme both for optical cavities, which can be continuously monitored by a photodetector, and for microwave cavities, which can be monitored only indirectly via the detection of atoms that have interacted with the cavity field. We also discuss the possibility of applying these methods for decoherence control in quantum information processing.

  • Received 8 January 1998

DOI:https://doi.org/10.1103/PhysRevA.57.4930

©1998 American Physical Society

Authors & Affiliations

D. Vitali and P. Tombesi

  • Dipartimento di Matematica e Fisica, Università di Camerino, via Madonna delle Carceri, I-62032 Camerino, Italy and
  • Istituto Nazionale di Fisica della Materia, Camerino, Italy

G. J. Milburn

  • Physics Department, University of Queensland, St. Lucia 4072, Brisbane, Australia

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Vol. 57, Iss. 6 — June 1998

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