Comparison of finite-temperature topological indicators based on Uhlmann connection
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DOI: 10.1103/physrevb.104.165417
Abstract: Two indicators of finite-temperature topological properties based on the Uhlmann connection, one generalizing the Wilson loop to the Uhlmann-Wilson loop and the other generalizing the Berry phase to the Uhlmann phase, are constructed explicitly for… read more here.
Keywords: temperature topological; finite temperature; temperature; uhlmann connection ... See more keywords
Fidelity and Uhlmann connection analysis of topological phase transitions in two dimensions
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DOI: 10.1103/physrevb.98.245141
Abstract: We study the behavior of the fidelity and the Uhlmann connection in two-dimensional systems of free fermions that exhibit nontrivial topological behavior. In particular, we use the fidelity and a quantity closely related to the… read more here.
Keywords: phase; fidelity; temperature; phase transitions ... See more keywords