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
Quantum Correlation Based on Uhlmann Fidelity for Gaussian States
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DOI: 10.3390/e21010006
Abstract: A quantum correlation NFG,A for (n+m)-mode continuous-variable systems is introduced in terms of local Gaussian unitary operations performed on Subsystem A based on Uhlmann fidelity F. This quantity is a remedy for the local ancilla… read more here.
Keywords: quantum correlation; based uhlmann; uhlmann fidelity; gaussian states ... See more keywords