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Phys. Rev. A 76, 010301(R) (2007) [4 pages]

Stabilizing entanglement by quantum-jump-based feedback

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A. R. R. Carvalho
Department of Physics, Faculty of Science, The Australian National University, Australian Capital Territory 0200, Australia

J. J. Hope
Australian Centre for Quantum-Atom Optics, Department of Physics, Faculty of Science, The Australian National University, Australian Capital Territory 0200, Australia

Received 7 January 2007; published 11 July 2007

We show that direct feedback based on quantum-jump detection can be used to generate entangled steady states. We present a strategy that is insensitive to detection inefficiencies and robust against errors in the control Hamiltonian. This feedback procedure is also shown to overcome spontaneous emission effects by stabilizing states with a high degree of entanglement.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.76.010301
DOI:
10.1103/PhysRevA.76.010301
PACS:
03.67.Mn, 03.65.Yz, 42.50.Lc, 42.50.Pq
 
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