Intrinsic relation between ground-state fidelity and the characterization of a quantum phase transition
Intrinsic relation between ground-state fidelity and the characterization of a quantum phase transition
The notion of fidelity in quantum information science has been recently applied to analyze quantum phase transitions from the viewpoint of the ground-state (GS) overlap for various many-body systems. In this work, we unveil the intrinsic relation between the GS fidelity and the derivatives of GS energy and find that …