Entanglement spectrum of the degenerative ground state of Heisenberg ladders in a time-dependent magnetic field

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dc.citation.issue5
dc.citation.rankM21
dc.citation.spage57003
dc.citation.volume119
dc.contributor.authorPredin, Sonja
dc.date.accessioned2024-07-05T13:07:24Z
dc.date.available2024-07-05T13:07:24Z
dc.date.issued2017-11-14
dc.description.abstractWe investigate the relationship between the entanglement and subsystem Hamiltonians in the perturbative regime of strong coupling between subsystems. One of the two conditions that guarantees the proportionality between these Hamiltonians obtained by using the nondegenerate perturbation theory within the first order is that the unperturbed ground state has a trivial entanglement Hamiltonian. Furthermore, we study the entanglement Hamiltonian of the Heisenberg ladders in a time-dependent magnetic field using the degenerate perturbation theory, where couplings between legs are considered as a perturbation. In this case, when the ground state is twofold degenerate, and the entanglement Hamiltonian is proportional to the Hamiltonian of a chain within first-order perturbation theory, even then also the unperturbed ground state has a nontrivial entanglement spectrum.
dc.identifier.doi10.1209/0295-5075/119/57003
dc.identifier.issn0295-5075
dc.identifier.issn1286-4854
dc.identifier.scopus2-s2.0-85040125468
dc.identifier.urihttps://pub.ipb.ac.rs/handle/123456789/182
dc.identifier.wos000415827100011
dc.language.isoen
dc.publisherInstitute of Physics Publishing
dc.relation.ispartofEPL (Europhysics Letters)
dc.relation.ispartofabbrEPL
dc.rightsopenAccess
dc.titleEntanglement spectrum of the degenerative ground state of Heisenberg ladders in a time-dependent magnetic field
dc.typeArticle
dc.type.versionpublishedVersion
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