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Phys. Rev. Lett. 86, 544–547 (2001)

Entangling Operations and Their Implementation Using a Small Amount of Entanglement

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J. I. Cirac1, W. Dür1, B. Kraus1, and M. Lewenstein2
1Institut für Theoretische Physik, Universität Innsbruck, A-6020 Innsbruck, Austria
2Institut für Theoretische Physik, Universität Hannover, Hannover, Germany

Received 18 July 2000; published in the issue dated 15 January 2001

We study when a physical operation can produce entanglement between two systems initially disentangled. The formalism we develop allows us to show that one can perform certain nonlocal operations with unit probability by performing local measurement on states that are weakly entangled.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.86.544
DOI:
10.1103/PhysRevLett.86.544
PACS:
03.67.Hk, 03.65.Ca, 03.65.Ta