Thermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field

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dc.creatorZhang, Guo-Feng
dc.date2005-09-01
dc.date2005-09-02
dc.date.accessioned2026-07-07T06:13:26Z
dc.date.available2026-07-07T06:13:26Z
dc.descriptionThe thermal entanglement in a two-qubit Heisenberg \emph{XXZ} spin chain is investigated under an inhomogeneous magnetic field \emph{b}. We show that the ground-state entanglement is independent of the interaction of \emph{z}-component $J_{z}$. The thermal entanglement at the fixed temperature can be enhanced when $J_{z}$ increases. We strictly show that for any temperature \emph{T} and $J_{z}$ the entanglement is symmetric with respect to zero inhomogeneous magnetic field, and the critical inhomogeneous magnetic field $b_{c}$ is independent of $J_{z}$. The critical magnetic field $B_{c}$ increases with the increasing $|b|$ but the maximum entanglement value that the system can arrive becomes smaller.
dc.description5 EPS figures
dc.identifierhttps://arxiv.org/abs/quant-ph/0509009
dc.identifierhttp://arxiv.org/abs/quant-ph/0509009
dc.identifierPhys. Rev. A 72, 034302 (2005)
dc.identifierdoi:10.1103/PhysRevA.72.034302
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/93107
dc.subjectQuantum Physics
dc.titleThermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field
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