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Remarks on Entanglement and Identical Particles

Benatti, F.; Floreanini, R.; Franchini, Fabio; Marzolino, Ugo (2017) Remarks on Entanglement and Identical Particles. Open Systems and Information Dynamics, 24 (3). ISSN 1230-1612

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We argue that in the case of identical particles the most natural identification of separability, that is of absence of non- classical correlations, is via the factorization of mean values of commuting observables. It thus follows that separability and entanglement depend both on the state and on the choice of observables and are not absolute notions. We compare this point of view with a recent novel approach to the entanglement of identical particles, which allows for the definition of an entanglement entropy from a suitably defined reduced particle density matrix, without the need of labelling the system constituents. We contrast this figure of merit with the aforementioned lack of an absolute notion of entanglement by considering few paradigmatic examples.

Item Type: Article
Uncontrolled Keywords: entanglement ; identical particles
Subjects: NATURAL SCIENCES > Physics
Divisions: Theoretical Physics Division
Project titleProject leaderProject codeProject type
Novel Characterizations of Classical and Quantum Many-Body Systems-ManyBodyCharacterizaFabio FranchiniIP-2016-06-3347HRZZ
Depositing User: Fabio Franchini
Date Deposited: 07 May 2020 13:49
DOI: 10.1142/S1230161217400042

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