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Total Pairwise Quantum Correlation and Entanglement in a Mixed-Three-Spin Ising-$XY$ Model with Added Dzyaloshinskii–Moriya Interaction under Decoherence |
| H. A. Zad** |
Young Researchers and Elite Club, Mashhad Branch, Islamic Azad University, Mashhad, Iran
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H. A. Zad 2016 Chin. Phys. Lett. 33 090302 |
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Abstract We investigate the behavior of geometric global quantum discord (GGQD) and concurrence (C) between half-spins of a mixed-three-spin (1/2, 1, 1/2) system with the Ising-$XY$ model for which spins (1, 1/2) have the Ising interaction and half-spins (1/2, 1/2) have both $XY$ and the Dzyaloshinskii–Moriya interactions together, under the decoherence action. A single-ion anisotropy property with coefficient $\zeta$ is assumed for the spin-integer. This system which includes an analytical Hamiltonian is considered at the front of an external homogeneous magnetic field $B$ in thermal equilibrium. Finally, we compare GGQD and C and express some interesting phase flip reactions of the total quantum correlation and pairwise entanglement between spins (1/2, 1/2). Generally, we conclude that the concurrence and GGQD have different behaviors under the phase flip channel.
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Received: 30 May 2016
Published: 30 September 2016
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| PACS: |
03.67.-a
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(Quantum information)
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03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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75.10.Pq
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(Spin chain models)
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