Entanglement manipulation via dynamics in multiple quantum spin systems

Entanglement manipulation via dynamics in multiple quantum spin systems We study manipulation of entanglement between two identical networks of quantum mechanical particles. Firstly, we reduce the problem of entanglement transfer to the problem of quantum state transfer. Then, we consider entanglement concentration and purification based on free dynamics on the networks and local measurements on the vertices. By introducing an appropriate measure of efficiency, we characterize the performance of the protocol. We give evidence that such a measure does not depend on the network topology, and we estimate the contribution given by the number of entangled pairs initially shared by the two networks. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Quantum Information Processing Springer Journals

Entanglement manipulation via dynamics in multiple quantum spin systems

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Publisher
Springer US
Copyright
Copyright © 2010 by Springer Science+Business Media, LLC
Subject
Physics; Quantum Information Technology, Spintronics; Quantum Computing; Data Structures, Cryptology and Information Theory; Quantum Physics; Mathematical Physics
ISSN
1570-0755
eISSN
1573-1332
D.O.I.
10.1007/s11128-010-0182-1
Publisher site
See Article on Publisher Site

Abstract

We study manipulation of entanglement between two identical networks of quantum mechanical particles. Firstly, we reduce the problem of entanglement transfer to the problem of quantum state transfer. Then, we consider entanglement concentration and purification based on free dynamics on the networks and local measurements on the vertices. By introducing an appropriate measure of efficiency, we characterize the performance of the protocol. We give evidence that such a measure does not depend on the network topology, and we estimate the contribution given by the number of entangled pairs initially shared by the two networks.

Journal

Quantum Information ProcessingSpringer Journals

Published: Jun 8, 2010

References

  • The quantum internet
    Kimble, H.J.
  • Quantum entanglement
    Horodecki, R.; Horodecki, P.; Horodecki, M.; Horodecki, K.
  • Perfect transfer of arbitrary states in quantum spin, networks
    Christandl, M.; Datta, N.; Dorlas, T.; Ekert, A.; Kay, A.; Landahl, A.

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