Entanglement manipulation via dynamics in multiple quantum spin systems

Details Entanglement manipulation via dynamics in multiple quantum spin systems Entanglement manipulation via dynamics in multiple quantum spin systems

2009-12-30

arxiv.org/abs/0912.5499v3

Quantum Inf Process (2011) 10, pp.107-121

Physics

Quantum Physics

7 pages, 2 figures; Major Revisions

Scientific paper

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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