2026-04-30T01:34:22Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/100022025-01-24T01:05:39Zcom_10259.4_2557com_10259_5086com_10259_2604col_10259.4_2558
Capizzi, Luca
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500
De Fazio, Cecilia
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500
Mazzoni, Michele
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500
Santamaría Sanz, Lucía
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Castro-Alvaredo, Olalla A.
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2025-01-23T07:28:28Z
2025-01-23T07:28:28Z
2022-12
http://hdl.handle.net/10259/10002
10.1007/JHEP12(2022)128
1029-8479
In 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.
application/pdf
eng
Springer
Journal of High Energy Physics. 2022, n. 12
https://doi.org/10.1007/JHEP12(2022)128
Atribución 4.0 Internacional
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
Field theories in lower dimensions
Global Symmetries
Integrable field theories
Física
Physics
Symmetry resolved entanglement of excited states in quantum field theory. Part II. Numerics, interacting theories and higher dimensions
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Journal of High Energy Physics
2022
12
THUMBNAIL
Capizzi-jhep_2_2022.pdf.jpg
Capizzi-jhep_2_2022.pdf.jpg
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Capizzi-jhep_2_2022.pdf
Capizzi-jhep_2_2022.pdf
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oai:riubu.ubu.es:10259/10002
2025-01-24 02:05:39.376
Repositorio Institucional de la Universidad de Burgos
bubrep@ubu.es
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