Thermal entanglement of a three-qubit Heisenberg chain with a nonuniform magnetic field

Guo Hui Yang; Ling Zhou

doi:10.1088/0253-6102/49/6/62

Thermal entanglement of a three-qubit Heisenberg chain with a nonuniform magnetic field

Guo Hui Yang^*
, Ling Zhou

^*Corresponding author for this work

Dalian University of Technology

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The thermal entanglement of a three-qubit Heisenberg chain under a nonuniform magnetic field is studied. It is very interesting to note that the next nearest neighbor entanglement (NNNE) could be larger than the nearest neighbor entanglement (NNE). We analyze the ground state entanglement, and give the conditions that NNNE is larger than NNE near zero temperature. Our results also show that the nonuniform field could induce the entanglement and improve the threshold temperature at certain parameter region.

Original language	English
Pages (from-to)	1635-1638
Number of pages	4
Journal	Communications in Theoretical Physics
Volume	49
Issue number	6
DOIs	https://doi.org/10.1088/0253-6102/49/6/62
State	Published - 15 Jun 2008
Externally published	Yes

Keywords

Entanglement
Heisenberg model
Nonuniform magnetic field

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10.1088/0253-6102/49/6/62

Cite this

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title = "Thermal entanglement of a three-qubit Heisenberg chain with a nonuniform magnetic field",

abstract = "The thermal entanglement of a three-qubit Heisenberg chain under a nonuniform magnetic field is studied. It is very interesting to note that the next nearest neighbor entanglement (NNNE) could be larger than the nearest neighbor entanglement (NNE). We analyze the ground state entanglement, and give the conditions that NNNE is larger than NNE near zero temperature. Our results also show that the nonuniform field could induce the entanglement and improve the threshold temperature at certain parameter region.",

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AU - Zhou, Ling

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N2 - The thermal entanglement of a three-qubit Heisenberg chain under a nonuniform magnetic field is studied. It is very interesting to note that the next nearest neighbor entanglement (NNNE) could be larger than the nearest neighbor entanglement (NNE). We analyze the ground state entanglement, and give the conditions that NNNE is larger than NNE near zero temperature. Our results also show that the nonuniform field could induce the entanglement and improve the threshold temperature at certain parameter region.

AB - The thermal entanglement of a three-qubit Heisenberg chain under a nonuniform magnetic field is studied. It is very interesting to note that the next nearest neighbor entanglement (NNNE) could be larger than the nearest neighbor entanglement (NNE). We analyze the ground state entanglement, and give the conditions that NNNE is larger than NNE near zero temperature. Our results also show that the nonuniform field could induce the entanglement and improve the threshold temperature at certain parameter region.

KW - Entanglement

KW - Heisenberg model

KW - Nonuniform magnetic field

UR - https://www.scopus.com/pages/publications/51349165402

U2 - 10.1088/0253-6102/49/6/62

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Thermal entanglement of a three-qubit Heisenberg chain with a nonuniform magnetic field

Abstract

Keywords

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