Quantum state transfer in arrays of flux qubits

被引:51
作者
Lyakhov, A [1 ]
Bruder, C [1 ]
机构
[1] Univ Basel, Dept Phys & Astron, CH-4056 Basel, Switzerland
来源
NEW JOURNAL OF PHYSICS | 2005年 / 7卷
关键词
D O I
10.1088/1367-2630/7/1/181
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In this paper, we describe a possible experimental realization of Bose's idea to use spin chains for short-distance quantum communication (Bose 2003 Phys. Rev. Lett. 91 207901). Josephson arrays have been proposed and analysed as transmission channels for systems of superconducting charge qubits. Here, we consider a chain of persistent-current qubits, that is appropriate for state transfer with high fidelity in systems containing flux qubits. We calculate the fidelity of state transfer for this system. In general, the Hamiltonian of this system is not of XXZ-type, and we analyse the magnitude and the effect of the terms that do not conserve the z-component of the total spin.
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页数:10
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