The effect of spin-orbit interaction on entanglement of two-qubit Heisenberg XYZ systems in an inhomogeneous magnetic field
| Autor: | Kheirandish, Fardin, Akhtarshenas, S. Javad, Mohammadi, Hamidreza |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Phys. Rev. A 042309 (2008) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevA.77.042309 |
| Popis: | The role of spin-orbit interaction on the ground state and thermal entanglement of a Heisenberg XYZ two-qubit system in the presence of an inhomogeneous magnetic field is investigated. For a certain value of spin-orbit parameter $D$, the ground state entanglement tends to vanish suddenly and when $D$ crosses its critical value $D_c$, the entanglement undergoes a revival. The maximum value of the entanglement occurs in the revival region. In finite temperatures there are revival regions in $D-T$ plane. In these regions, entanglement first increases with increasing temperature and then decreases and ultimately vanishes for temperatures above a critical value. This critical temperature is an increasing function of $D$, thus the nonzero entanglement can exist for larger temperatures. In addition, the amount of entanglement in the revival region depends on the spin-orbit parameter. Also, the entanglement teleportation via the quantum channel constructed by the above system is investigated and finally the influence of the spin-orbit interaction on the fidelity of teleportation and entanglement of replica state is studied. Comment: Two columns, 9 pages, 8 Figs |
| Databáze: | arXiv |
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