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  Quasiparticles as detector of topological quantum phase transitions

Manna, S., Srivatsa, N., Wildeboer, J., & Nielsen, A. E. B. (2020). Quasiparticles as detector of topological quantum phase transitions. Physical Review Research, 2(4): 043443. doi:10.1103/PhysRevResearch.2.043443.

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 Urheber:
Manna, Sourav1, Autor           
Srivatsa, N.S.1, Autor           
Wildeboer, Julia1, Autor           
Nielsen, Anne E. B.1, Autor           
Affiliations:
1Max Planck Institute for the Physics of Complex Systems, Max Planck Society, ou_2117288              

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 MPIPKS: Phase transitions and critical phenomena
 Zusammenfassung: A number of tools have been developed to detect topological phase transitions in strongly correlated quantum systems. They apply under different conditions, but do not cover the full range of many-body models. It is hence desirable to further expand the toolbox. Here, we propose to use quasiparticle properties to detect quantum phase transitions. The approach is independent from the choice of boundary conditions, and it does not assume a particular lattice structure. The probe is hence suitable for, e.g., fractals and quasicrystals. The method requires that one can reliably create quasiparticles in the considered systems. In the simplest cases, this can be done by a pinning potential, while it is less straightforward in more complicated systems. We apply the method to several rather different examples, including one that cannot be handled by the commonly used probes, and in all the cases we find that the numerical costs are low. This is so, because a simple property, such as the charge of the anyons, is sufficient to detect the phase transition point. For some of the examples, this allows us to study larger systems and/or further parameter values compared to previous studies.

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 Datum: 2020-12-312020-12-01
 Publikationsstatus: Erschienen
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 Identifikatoren: ISI: 000605522900004
DOI: 10.1103/PhysRevResearch.2.043443
arXiv: 1909.02046
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Titel: Physical Review Research
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: College Park, Maryland, United States : American Physical Society (APS)
Seiten: - Band / Heft: 2 (4) Artikelnummer: 043443 Start- / Endseite: - Identifikator: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564