Entanglement of indistinguishable particles shared between two parties

Using an operational definition we quantify the entanglement, E(P), between two parties who share an arbitrary pure state of N indistinguishable particles. We show that E(P)< or =E(M), where E(M) is the bipartite entanglement calculated from the mode-occupation representation. Unlike E(M), E(P) i...

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Bibliographic Details
Published in:Physical review letters 2003-08, Vol.91 (9), p.097902-097902, Article 097902
Main Authors: Wiseman, H M, Vaccaro, John A
Format: Article
Language:English
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Summary:Using an operational definition we quantify the entanglement, E(P), between two parties who share an arbitrary pure state of N indistinguishable particles. We show that E(P)< or =E(M), where E(M) is the bipartite entanglement calculated from the mode-occupation representation. Unlike E(M), E(P) is superadditive. For example, E(P)=0 for any single-particle state, but the state |1>|1>, where both modes are split between the two parties, has E(P)=1/2. We discuss how this relates to quantum correlations between particles, for both fermions and bosons.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.91.097902