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Entanglement of the Thermal State of an Anisotropic XYZ Spin Chain in an Inhomogeneous Constant Magnetic Field |
| A. -S. F. Obada**, G. M. Abd Al-Kadar, F. K. Faramawy, A. A. Youssef |
Mathematics Department, Faculty of Science, Al-Azhar University, Nasr City 11884, Cairo, Egypt
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G. M. Abd Al-Kadar, F. K. Faramawy, A. -S. F. Obada et al 2012 Chin. Phys. Lett. 29 030301 |
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Abstract A system of a two-qubit Heisenberg anisotropic XYZ spin chain in an inhomogeneous constant magnetic field with the Dzyaloshinskii–Moriya interaction is studied. The energy eigenvalues, the corresponding eigenstates and the thermal states of the system are evaluated. The entanglement is investigated according to Wootter's concurrence. The concurrence is studied against temperature for different values of the parameters involved.
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Received: 16 May 2011
Published: 11 March 2012
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