dorsal/arxiv
View SchemaThermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field
| Authors | Guo-Feng Zhang |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0509009 |
| URL | https://arxiv.org/abs/quant-ph/0509009 |
| DOI | 10.1103/PhysRevA.72.034302 |
| Journal | Phys. Rev. A 72, 034302 (2005) |
Abstract
The 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.
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"abstract": "The thermal entanglement in a two-qubit Heisenberg \\emph{XXZ} spin chain is\ninvestigated under an inhomogeneous magnetic field \\emph{b}. We show that the\nground-state entanglement is independent of the interaction of\n\\emph{z}-component $J_{z}$. The thermal entanglement at the fixed temperature\ncan be enhanced when $J_{z}$ increases. We strictly show that for any\ntemperature \\emph{T} and $J_{z}$ the entanglement is symmetric with respect to\nzero inhomogeneous magnetic field, and the critical inhomogeneous magnetic\nfield $b_{c}$ is independent of $J_{z}$. The critical magnetic field $B_{c}$\nincreases with the increasing $|b|$ but the maximum entanglement value that the\nsystem can arrive becomes smaller.",
"arxiv_id": "quant-ph/0509009",
"authors": [
"Guo-Feng Zhang"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.72.034302",
"journal_ref": "Phys. Rev. A 72, 034302 (2005)",
"title": "Thermal entanglement in a two-qubit Heisenberg XXZ spin chain under an inhomogeneous magnetic field",
"url": "https://arxiv.org/abs/quant-ph/0509009"
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