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Entanglement manipulation via dynamics in multiple quantum spin systems

Casaccino, A; Mancini, S; Severini, S; (2011) Entanglement manipulation via dynamics in multiple quantum spin systems. QUANTUM INF PROCESS , 10 (1) 107 - 121. 10.1007/s11128-010-0182-1.

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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.

Type:Article
Title:Entanglement manipulation via dynamics in multiple quantum spin systems
DOI:10.1007/s11128-010-0182-1
Keywords:STATE TRANSFER, NETWORKS, DOTS
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Computer Science

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