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Phys. Rev. A 60, 194–197 (1999)

Purification via entanglement swapping and conserved entanglement

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S. Bose1, V. Vedral2, and P. L. Knight1
1Optics Section, The Blackett Laboratory, Imperial College, London SW7 2BZ, England
2Centre for Quantum Computing, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, England

Received 7 December 1998; published in the issue dated July 1999

We investigate the purification of entangled states by local actions using a variant of entanglement swapping. We show that there exists a measure of entanglement which is conserved in this type of purification procedure.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.60.194
DOI:
10.1103/PhysRevA.60.194
PACS:
03.67.-a
 
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