dc.date.accessioned 2021-06-08T16:11:30Z dc.date.available 2021-06-08T16:11:30Z dc.identifier.uri https://digital.cic.gba.gob.ar/handle/11746/10965 dc.title One-body entanglement as a quantum resource in fermionic systems en dc.type Artículo es dcterms.abstract We show that one-body entanglement, which is a measure of the deviation of a pure fermionic state from en a Slater determinant (SD) and is determined by the mixedness of the single-particle density matrix (SPDM), can be considered as a quantum resource. The associated theory has SDs and their convex hull as free states, and number conserving fermion linear optics operations (FLO), which include one-body unitary transformations and measurements of the occupancy of single-particle modes, as the basic free operations. We first provide a bipartitelike formulation of one-body entanglement, based on a Schmidt-like decomposition of a pure Nfermion state, from which the SPDM [together with the (N − 1)-body density matrix] can be derived. It is then proved that under FLO operations the initial and postmeasurement SPDMs always satisfy a majorization relation, which ensures that these operations cannot increase, on average, the one-body entanglement. It is finally shown that this resource is consistent with a model of fermionic quantum computation which requires correlations beyond antisymmetrization. More general free measurements and the relation with mode entanglement are also discussed. dcterms.issued 2020-10-26 dcterms.language Inglés es dcterms.license Attribution-NonCommercial-NoDerivatives 4.0 Internacional es dcterms.subject Quantum entanglement en dcterms.subject Fermionic systems en dcterms.subject Quantum resource theories en cic.version info:eu-repo/semantics/submittedVersion es dcterms.creator.author Gigena, Nicolás es dcterms.creator.author Di Tullio, Marco es dcterms.creator.author Rossignoli, Raúl Dante es cic.lugarDesarrollo Universidad Nacional de La Plata es dcterms.subject.materia Ciencias Físicas es dcterms.identifier.url Recurso completo es dcterms.isPartOf.issue vol. 102 es dcterms.isPartOf.series Physical Review A es cic.isPeerReviewed true es cic.isFulltext true es
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