Separable States Can Be Used To Distribute Entanglement
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- 17 July 2003
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 91 (3) , 037902
- https://doi.org/10.1103/physrevlett.91.037902
Abstract
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.Keywords
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