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quant-ph2018
Vanishing k-space fidelity and phase diagram's bulk-edge-bulk correspondence
P. D. Sacramento, B. Mera, N. Paunkovic
The fidelity between two infinitesimally close states or the fidelity susceptibility of a system are known to detect quantum phase transitions. Here we show that the k-space fideli…
cond-mat.str-el2018
Fidelity and Uhlmann connection analysis of topological phase transitions in two dimensions
S. T. Amin, B. Mera, C. Vlachou +2
We study the behaviour of the fidelity and the Uhlmann connection in two-dimensional systems of free fermions that exhibit non-trivial topological behavior. In particular, we use t…