| Influence of magnetic current on the ground state entanglement in an isotropic transverse XY chain |
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| 引用本文： | Liu Dan,Zhang Yong and Long Guilu. Influence of magnetic current on the ground state entanglement in an isotropic transverse XY chain[J]. 自然科学进展(英文版), 2007, 17(10): 1147-1151 |
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| 作者姓名： | Liu Dan Zhang Yong and Long Guilu |
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| 摘 要： | We study the ground state entanglement in a three-qubit XY chain under the influence of a magnetization current. It is found that the ground state changes from a W state to a disentangled state as the magnetic field varies. When the Lagrange multiplier λ> , namely under a strong magnetic current, the ground state holds onto a W state for a large range of the magnetic field strength. A phase transition to the magnetization-current phase occurs under a certain condition.
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Influence of magnetic current on the ground state entanglement in an isotropic transverse XY chain |
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| Liu Dan,Zhang Yong and Long Guilu. Influence of magnetic current on the ground state entanglement in an isotropic transverse XY chain[J]. Progress in Natural Science, 2007, 17(10): 1147-1151 |
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| Authors: | Liu Dan Zhang Yong Long Guilu |
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| Affiliation: | 1. Key Laboratory for Atomic and Molecular NanoSciences, and Department of Physics, Tsinghua University, Beijing 100084, China; 2. Center of Quantum Information Science and Technology, Tsinghua National Laboratory for information Science and Technology, Beijing 100084, China; 3. Institute of Physics, School of Sciences, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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| Abstract: | |
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| Keywords: | Heisenberg-XY chain magnetic-current phase transition. |
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