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Thermal Entanglement in a Two-Qutrit Spin-1 Anisotropic Heisenberg Model |
| Erhan Albayrak
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Erciyes University, Department of Physics, 38039, Kayseri, Turkey
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Erhan Albayrak 2011 Chin. Phys. Lett. 28 020306 |
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Abstract The negativity (N) as a measure of thermal entanglement (TE) is studied for a two−qutrit spin-1 anisotropic Heisenberg XXZ chain with Dzyaloshinskii–Moriya (DM) interaction in an inhomogeneous magnetic field in detail. The effects of the DM interaction parameter Dz on the thermal variation of the N for given values of the external magnetic field B, a parameter b which controls the inhomogeneity of B and the bilinear interaction parameters Jx=Jy≠Jz are obtained. It is found that N persists to higher values and to higher temperatures for the higher values of ±Dz and for the higher positive values of Jz, i.e. in the antiferromagnetic (AFM) case. When Jz<0, the ferromagnetic (FM) case, and Dz is small, and if Jz is strong enough to compete with Dz, N decreases. In addition, N declines with the increasing values of B and b.
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| Keywords:
03.67.Mn
03.65.Ud
75.10.Jm
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Received: 10 November 2010
Published: 30 January 2011
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| PACS: |
03.67.Mn
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(Entanglement measures, witnesses, and other characterizations)
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03.65.Ud
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(Entanglement and quantum nonlocality)
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75.10.Jm
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(Quantized spin models, including quantum spin frustration)
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