Separable states can be used to distribute entanglement

Preprint

21 February 2003

preprint
Published by arXiv in arXiv

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

DISTRIBUTE ENTANGLEMENT
CONTINUOUS INTERACTION
CREATE ENTANGLEMENT
CONSIDER ANALOGOUS
DISTANT PARTICLES
SEPARABLE STATES
NO ENTANGLEMENT
ENTANGLED
PARTICLE

All Related Versions

Version 1, 2003-02-21, ArXiv
Version 2, 2003-05-23, ArXiv
Published version: Physical Review Letters, 91 (3), 037902.

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