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dc.contributor.author
Bertok, E.
dc.contributor.author
Heidrich Meisner, F.
dc.contributor.author
Aligia, Armando Ángel
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dc.date.available
2023-08-18T16:05:34Z
dc.date.issued
2022-07
dc.identifier.citation
Bertok, E.; Heidrich Meisner, F.; Aligia, Armando Ángel; Splitting of topological charge pumping in an interacting two-component fermionic Rice-Mele Hubbard model; American Physical Society; Physical Review B; 106; 4; 7-2022; 1-10
dc.identifier.issn
2469-9950
dc.identifier.uri
http://hdl.handle.net/11336/208745
dc.description.abstract
A Thouless pump transports an integer amount of charge when pumping adiabatically around a singularity. We study the splitting of such a critical point into two separate critical points by adding a Hubbard interaction. Furthermore, we consider extensions to a spinful Rice-Mele model, namely, a staggered magnetic field or an Ising-type spin coupling, further reducing the spin symmetry. The resulting models additionally allow for the transport of a single charge in a two-component system of spinful fermions, whereas in the absence of interactions, zero or two charges are pumped. In the SU(2)-symmetric case, the ionic Hubbard model is visited once along pump cycles that enclose a single singularity. Adding a staggered magnetic field additionally transports an integer amount of spin while the Ising term realizes a pure charge pump. We employ real-time simulations in finite and infinite systems to calculate the adiabatic charge and spin transport, complemented by the analysis of gaps and the many-body polarization to confirm the adiabatic nature of the pump. The resulting charge pumps are expected to be measurable in finite-pumping speed experiments in ultracold atomic gases for which the SU(2) invariant version is the most promising path. We discuss the implications of our results for a related quantum-gas experiment by Walter et al.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
American Physical Society
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Thouless pump
dc.subject
Rice-Mele model
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ionic Hubbard model
dc.subject
charge and spin transport
dc.subject.classification
Física de los Materiales Condensados
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Splitting of topological charge pumping in an interacting two-component fermionic Rice-Mele Hubbard model
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-07-10T11:16:46Z
dc.identifier.eissn
2469-9969
dc.journal.volume
106
dc.journal.number
4
dc.journal.pagination
1-10
dc.journal.pais
Estados Unidos
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dc.description.fil
Fil: Bertok, E.. Universität Göttingen; Alemania
dc.description.fil
Fil: Heidrich Meisner, F.. Universität Göttingen; Alemania
dc.description.fil
Fil: Aligia, Armando Ángel. Universität Göttingen; Alemania. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche | Comisión Nacional de Energía Atómica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología. Unidad Ejecutora Instituto de Nanociencia y Nanotecnología - Nodo Bariloche; Argentina
dc.journal.title
Physical Review B
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevB.106.045141
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