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题名: Quantum-state transmission via a spin ladder as a robust data bus
作者: Li, Y ;  Shi, T ;  Chen, B ;  Song, Z ;  Sun, CP
刊名: PHYSICAL REVIEW A
出版日期: 2005
卷号: 71, 期号:2, 页码:-
关键词: COUPLED HEISENBERG-CHAINS ;  HUBBARD-MODEL ;  COMPUTATION ;  INFORMATION ;  SYSTEMS
学科分类: Physics
通讯作者: Li, Y , Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China.
部门归属: Nankai Univ, Dept Phys, Tianjin 300071, Peoples R China; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: We explore the physical mechanism to coherently transfer the quantum information of spin by connecting two spins to an isotropic antiferromagnetic spin ladder system as data bus. Due to a large spin gap existing in such a perfect medium, the effective Hamiltonian of the two connected spins can be archived as that of Heisenberg type, which possesses a ground state with maximal entanglement. We show that the effective coupling strength is inversely proportional to the distance of the two spins and thus the quantum information can be transferred between the two spins separated by a longer distance, i.e., the characteristic time of quantum-state transferring linearly depends on the distance.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000227483900025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13886
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Li, Y,Shi, T,Chen, B,et al. Quantum-state transmission via a spin ladder as a robust data bus[J]. PHYSICAL REVIEW A,2005,71(2):-.
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