Entanglement generation between distant parties via disordered spin chains

We study the emergence of bipartite entanglement between a pair of spins weakly connected to the ends of a linear disordered XY spin-1/2 channel. We analyze how their concurrence responds to structural and on-site fluctuations embodied by long-range spatially-correlated sequences. We show that the e...

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Bibliographic Details
Published in:Quantum information processing 2019-02, Vol.18 (2), p.1-15, Article 41
Main Authors: Almeida, Guilherme M. A., de Moura, Francisco A. B. F., Lyra, Marcelo L.
Format: Article
Language:English
Subjects:
Chain entanglement
Data Structures and Information Theory
Mathematical Physics
Physics
Physics and Astronomy
Quantum Computing
Quantum entanglement
Quantum Information Technology
Quantum Physics
Spintronics
Variation
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Summary:We study the emergence of bipartite entanglement between a pair of spins weakly connected to the ends of a linear disordered XY spin-1/2 channel. We analyze how their concurrence responds to structural and on-site fluctuations embodied by long-range spatially-correlated sequences. We show that the end-to-end entanglement is very robust against disorder and asymmetries in the channel provided that the degree of correlations are strong enough and both entangling parties are tuned accordingly. Our results offer further alternatives in the design of stable quantum communication protocols via imperfect spin channels.
ISSN:1570-0755
1573-1332
DOI:10.1007/s11128-018-2157-6