Quantum Information Processing

, Volume 10, Issue 1, pp 107–121

Entanglement manipulation via dynamics in multiple quantum spin systems

  • Andrea Casaccino
  • Stefano Mancini
  • Simone Severini


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.


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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Andrea Casaccino
    • 1
    • 2
  • Stefano Mancini
    • 3
    • 4
  • Simone Severini
    • 5
  1. 1.Computer Architecture Group Lab, Information Engineering DepartmentUniversity of SienaSienaItaly
  2. 2.Research Laboratory of ElectronicsMassachusetts Institute of TechnologyCambridgeUSA
  3. 3.School of Science and TechnologyUniversity of CamerinoCamerinoItaly
  4. 4.INFN, Sezione di PerugiaPerugiaItaly
  5. 5.Department of Physics and AstronomyUniversity College LondonLondonUnited Kingdom

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