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dc.contributor.authorCapizzi, Luca
dc.contributor.authorDe Fazio, Cecilia
dc.contributor.authorMazzoni, Michele
dc.contributor.authorSantamaría Sanz, Lucía 
dc.contributor.authorCastro-Alvaredo, Olalla A.
dc.date.accessioned2025-01-23T07:28:28Z
dc.date.available2025-01-23T07:28:28Z
dc.date.issued2022-12
dc.identifier.urihttp://hdl.handle.net/10259/10002
dc.description.abstractIn a recent paper we studied the entanglement content of zero-density excited states in complex free quantum field theories, focusing on the symmetry resolved entanglement entropy (SREE). By zero-density states we mean states consisting of a fixed, finite number of excitations above the ground state in an infinite-volume system. The SREE is defined for theories that possess an internal symmetry and provides a measure of the contribution to the total entanglement of each symmetry sector. In our work, we showed that the ratio of Fourier-transforms of the SREEs (i.e. the ratio of charged moments) takes a very simple and universal form for these states, which depends only on the number, statistics and symmetry charge of the excitations as well as the relative size of the entanglement region with respect to the whole system’s size. In this paper we provide numerical evidence for our formulae by computing functions of the charged moments in two free lattice theories: a 1D Fermi gas and a complex harmonic chain. We also extend our results in two directions: by showing that they apply also to excited states of interacting theories (i.e. magnon states) and by developing a higher dimensional generalisation of the branch point twist field picture, leading to results in (interacting) higher-dimensional models.es
dc.format.mimetypeapplication/pdf
dc.language.isoenges
dc.publisherSpringeres
dc.relation.ispartofJournal of High Energy Physics. 2022, n. 12es
dc.rightsAtribución 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectField theories in lower dimensionses
dc.subjectGlobal Symmetrieses
dc.subjectIntegrable field theorieses
dc.subject.otherFísicaes
dc.subject.otherPhysicses
dc.titleSymmetry resolved entanglement of excited states in quantum field theory. Part II. Numerics, interacting theories and higher dimensionses
dc.typeinfo:eu-repo/semantics/articlees
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.relation.publisherversionhttps://doi.org/10.1007/JHEP12(2022)128es
dc.identifier.doi10.1007/JHEP12(2022)128
dc.identifier.essn1029-8479
dc.journal.titleJournal of High Energy Physicses
dc.volume.number2022es
dc.issue.number12es
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersiones


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