509 citations · 3.2k across the 26 of their papers we have counts for
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quant-ph2006★ 221 cited
Mixed-state fidelity and quantum criticality at finite temperature
Paolo Zanardi, H. T. Quan, Xiaoguang Wang +1
We extend to finite temperature the fidelity approach to quantum phase transitions (QPTs). This is done by resorting to the notion of mixed-state fidelity that allows one to compar…
quant-ph2006★ 152 cited
Quantum phase transitions and quantum fidelity in free fermion graphs
M. Cozzini, P. Giorda, P. Zanardi
In this paper we analyze the ground state phase diagram of a class of fermionic Hamiltonians by looking at the fidelity of ground states corresponding to slightly different Hamilto…