78 citations · 93 across the 2 of their papers we have counts for
2 papers
quant-ph2007★ 78 cited
Fidelity Between Partial States as Signature of Quantum Phase Transitions
N. Paunkovic, P. D. Sacramento, P. Nogueira +2
We introduce a partial state fidelity approach to quantum phase transitions. We consider a superconducting lattice with a magnetic impurity inserted at its centre, and look at the…
cond-mat.supr-con2007★ 15 cited
Entanglement signatures of the quantum phase transition induced by a magnetic impurity in a superconductor
P. D. Sacramento, P. Nogueira, V. R. Vieira +1
The insertion of a magnetic impurity in a superconductor induces a first order quantum phase transition as the coupling to the electronic spin density increases. As the transition…