Separable States Can Be Used To Distribute Entanglement

T. S. Cubitt, F. Verstraete, W. Dür, and J. I. Cirac
Phys. Rev. Lett. 91, 037902 – Published 17 July 2003

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.

  • Figure
  • Figure
  • Received 21 February 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.037902

©2003 American Physical Society

Authors & Affiliations

T. S. Cubitt1, F. Verstraete1, W. Dür2, and J. I. Cirac1

  • 1Max Planck Institut für Quantenoptik, Hans–Kopfermann Strasse 1, D-85748 Garching, Germany
  • 2Sektion Physik, Ludwig-Maximilians-Universität München, Theresienstrasse 37, D-80333 München, Germany

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 91, Iss. 3 — 18 July 2003

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×