Intrinsic relation between ground-state fidelity and the characterization of a quantum phase transition

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dc.creatorChen, Shu
dc.creatorWang, Li
dc.creatorHao, Yajiang
dc.creatorWang, Yupeng
dc.date2007-12-29
dc.date2008-03-25
dc.date.accessioned2026-07-07T09:27:59Z
dc.date.available2026-07-07T09:27:59Z
dc.descriptionThe 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 they play equivalent role in identifying the quantum phase transition. The general connection between the two approaches enables us to understand the different singularity and scaling behaviors of fidelity exhibited in various systems on general grounds. Our general conclusions are illustrated via several quantum spin models which exhibit different kinds of QPTs.
dc.description5 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0801.0020
dc.identifierhttp://arxiv.org/abs/0801.0020
dc.identifierPhys. Rev. A 77, 032111 (2008)
dc.identifierdoi:10.1103/PhysRevA.77.032111
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/157299
dc.subjectOther Condensed Matter
dc.subjectStatistical Mechanics
dc.titleIntrinsic relation between ground-state fidelity and the characterization of a quantum phase transition
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