| 均匀磁场对海森堡XX链中两体热纠缠的影响 |
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| 引用本文： | 郭克涛,符力平. 均匀磁场对海森堡XX链中两体热纠缠的影响[J]. 量子光学学报, 2008, 14(1): 1-6 |
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| 作者姓名： | 郭克涛 符力平 |
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| 作者单位： | 中南大学物理学院,湖南,长沙,410083;中南大学物理学院,湖南,长沙,410083 |
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| 摘 要： | 通过计算比特数n不大于6海森堡XX链中的两体纠缠,发现只有当n为奇数时,最近邻纠缠在磁场为零时才出现下凹现象.当n为4或6时,非最近邻纠缠在磁场两边对称;当n为5时,非最近邻纠缠在磁场两边则不对称.
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| 关 键 词： | 热纠缠 海森堡链 均匀磁场 |
| 文章编号： | 1007-6654（2008）01-0001-06 |
| 收稿时间： | 2006-12-21 |
| 修稿时间： | 2006-12-21 |
An Uniform Magnetic Effects on the Pairwise Thermal Entanglement in N-qubit Heisenberg XX Chain |
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| GUO Ke-tao,FU Li-ping. An Uniform Magnetic Effects on the Pairwise Thermal Entanglement in N-qubit Heisenberg XX Chain[J]. Acta Sinica Quantum Optica, 2008, 14(1): 1-6 |
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| Authors: | GUO Ke-tao FU Li-ping |
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| Abstract: | Basing on the calculation of all the pairwise entanglement in the n. qubit(n≤6)Heisenberg XX chain with an uniform magnetic field, we find that the nearest-neighbour entanglement drops to a dip at the point of B=0as long as the number is odd. The non-nearest pairwise entanglement appears symmetrically at two sides of B when nequals 4(or 6), while it doesn't appear symmetrically when n equals 5. |
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| Keywords: | thermal entanglement Heisenberg chain uniform magnetic field |
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