Entanglement of Indistinguishable Particles Shared between Two Parties
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Using an operational definition we quantify the entanglement, EP, between two parties who share an arbitrary pure state of N indistinguishable particles. We show that EP=EM, where EM is the bipartite entanglement calculated from the mode-occupation representation. Unlike EM, EP is superadditive. For example, EP=0 for any single-particle state, but the state |1?|1?, where both modes are split between the two parties, has EP=1/2. We discuss how this relates to quantum correlations between particles, for both fermions and bosons.
Physical Review Letters
Copyright 2003 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal link for access to the definitive, published version.