Entanglement detachment in fermionic systems

Santos, Hernán, Alvarellos, José E. y Rodríguez-Laguna, Javier . (2018) Entanglement detachment in fermionic systems. The European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics, 72, 203 (2018)


Título Entanglement detachment in fermionic systems
Autor(es) Santos, Hernán
Alvarellos, José E.
Rodríguez-Laguna, Javier
Materia(s) Física
Abstract This article introduces and discusses the concept of entanglement detachment. Under some circumstances, enlarging a few couplings of a Hamiltonian can effectively detach a (possibly disjoint) block within the ground state. This detachment is characterized by a sharp decrease in the entanglement entropy between block and environment, and leads to an increase of the internal correlations between the (possibly distant) sites of the block. We provide some examples of this detachment in free fermionic systems. The first example is an edge-dimerized chain, where the second and penultimate hoppings are increased. In that case, the two extreme sites constitute a block which disentangles from the rest of the chain. Further examples are given by (a) a superlattice which can be detached from a 1D chain, and (b) a star-graph, where the extreme sites can be detached or not depending on the presence of an external magnetic field, in analogy with the Aharonov-Bohm effect. We characterize these detached blocks by their reduced matrices, specially through their entanglement spectrum and entanglement Hamiltonian.
Editor(es) Springer
Fecha 2018-11-27
Formato application/pdf
Identificador bibliuned:DptoFF-FCIE-Articulos-Jealvarellos-0006
http://e-spacio.uned.es/fez/view/bibliuned:DptoFF-FCIE-Articulos-Jealvarellos-0006
DOI - identifier 10.1140/epjd/e2018-90453-7
ISSN - identifier 1434-6079
Nombre de la revista The European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics
Número de Volumen 72
Número de Issue 203 (2018)
Publicado en la Revista The European Physical Journal D. Atomic, Molecular, Optical and Plasma Physics, 72, 203 (2018)
Idioma eng
Versión de la publicación publishedVersion
Tipo de recurso Article
Derechos de acceso y licencia info:eu-repo/semantics/embargoedAccess
Tipo de acceso Acceso embargado
Notas adicionales The registered version of this article, first published in The European Physical Journal D , is available online at the publisher's website:Springer, https://doi.org/10.1140/epjd/e2018-90453-7

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Creado: Wed, 31 Jan 2024, 23:27:55 CET