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Quasiperiodicity hinders ergodic Floquet eigenstates
CeFEMA-LaPMET, Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal, Avenida Rovisco Pais; Centro de Física das Universidades do Minho e Porto, Departamento de Física e Astronomia, Faculdade de Ciências, Universidade do Porto, 4169-007 Porto, Portugal.
CeFEMA-LaPMET, Departamento de Física, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal, Avenida Rovisco Pais; Beijing Computational Science Research Center, Beijing 100193, China.
Nordita SU; Institute for Physics of Microstructures, Russian Academy of Sciences, 603950 Nizhny Novgorod, GSP-105, Russia.
2023 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, Vol. 108, no 10, article id 104201Article in journal (Refereed) Published
Abstract [en]

Quasiperiodic systems in one dimension can host nonergodic states, e.g., states localized in position or momentum. Periodic quenches within localized phases yield Floquet eigenstates of the same nature, i.e., spatially localized or ballistic. However, periodic quenches across these two nonergodic phases were thought to produce ergodic diffusivelike states even for noninteracting particles. We show that this expectation is not met at the thermodynamic limit where the system always attains a nonergodic state. We find that ergodicity may be recovered by scaling the Floquet quenching period with system size and determine the corresponding scaling function. Our results suggest that, while the fraction of spatially localized or ballistic states depends on the model's details, all Floquet eigenstates belong to one of these nonergodic categories. Our findings demonstrate that quasiperiodicity hinders ergodicity and thermalization, even in driven systems where these phenomena are commonly expected.

Place, publisher, year, edition, pages
American Physical Society (APS) , 2023. Vol. 108, no 10, article id 104201
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-338400DOI: 10.1103/PhysRevB.108.104201Scopus ID: 2-s2.0-85172410630OAI: oai:DiVA.org:kth-338400DiVA, id: diva2:1806705
Note

QC 20231023

Available from: 2023-10-23 Created: 2023-10-23 Last updated: 2023-10-23Bibliographically approved

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