Separable states can be used to distribute entanglement

Details Separable states can be used to distribute entanglement Separable states can be used to distribute entanglement

2003-02-21

arxiv.org/abs/quant-ph/0302168v2

PRL 91, 037902 (2003)

Physics

Quantum Physics

4 pages, 2 figures. Slight modifications

Scientific paper

10.1103/PhysRevLett.91.037902

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.

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