Phys. Rev. Lett. 91, 037902 (2003) [4 pages]Separable States Can Be Used To Distribute EntanglementReceived 21 February 2003; published 17 July 2003 We show that no entanglement is necessary to distribute entanglement; that is, two distant particles can be entangled by sending a third particle that is never entangled with the other two. Similarly, two particles can become entangled by continuous interaction with a highly mixed mediating particle that never itself becomes entangled. We also consider analogous properties of completely positive maps, in which the composition of two separable maps can create entanglement. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.037902
DOI:
10.1103/PhysRevLett.91.037902
PACS:
03.67.Mn, 03.65.Ud
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