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Uhlmann number in translational invariant systems

We define the Uhlmann number as an extension of the Chern number, and we use this quantity to describe the topology of 2D translational invariant Fermionic systems at finite temperature. We consider two paradigmatic systems and we study the changes in their topology through the Uhlmann number. Throu...

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Detalles Bibliográficos
Autores principales: Leonforte, Luca, Valenti, Davide, Spagnolo, Bernardo, Carollo, Angelo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6591291/
https://www.ncbi.nlm.nih.gov/pubmed/31235825
http://dx.doi.org/10.1038/s41598-019-45546-9