Quantum Critical Dynamics of A Qubit Coupled to An Isotropic Lipkin-Meshkov-Glick Bath

Simple item page
dc.creatorQuan, H. T.
dc.creatorWang, Z. D.
dc.creatorSun, C. P.
dc.date2007-02-28
dc.date.accessioned2026-07-07T08:31:36Z
dc.date.available2026-07-07T08:31:36Z
dc.descriptionWe explore a dynamic signature of quantum phase transition (QPT) in an isotropic Lipkin-Meshkov-Glick (LMG) model by studying the time evolution of a central qubit coupled to it. We evaluate exactly the time-dependent purity, which can be used to measure quantum coherence, of the central qubit. It is found that distinctly different behaviors of the purity as a function of the parameter reveal clearly the QPT point in the system. It is also clarified that the present model is equivalent to an anti Jaynes-Cummings model under certain conditions.
dc.description8 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0702268
dc.identifierhttp://arxiv.org/abs/quant-ph/0702268
dc.identifierPhys. Rev. A 76, 012104 (2007)
dc.identifierdoi:10.1103/PhysRevA.76.012104
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/138548
dc.subjectQuantum Physics
dc.titleQuantum Critical Dynamics of A Qubit Coupled to An Isotropic Lipkin-Meshkov-Glick Bath
dc.typetext

Files

Collections

arXiv