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Quantum Information Processing in a Spin-Bus System of Coupled Chains
Hao Xiang #,Zhu Shiqun *
School of Physical Science and Technology, Suzhou
*Correspondence author
#Submitted by
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Funding: 国家自然科学基金,教育部博士点基金（No.10774108,20050285002）
Opened online:21 November 2008
Accepted by: none
Citation: Hao Xiang ,Zhu Shiqun .Quantum Information Processing in a Spin-Bus System of Coupled Chains[OL]. [21 November 2008] http://en.paper.edu.cn/en_releasepaper/content/25962
 
 
The effective Heisenberg interaction of long distance is evaluated in spin qubits that are connected to a bus of two strongly coupled chains. Universal quantum computation can be realized in the bus that is kept frozen at the ground state. The effective interaction is primarily determined by the energy spectra of the bus. By varying the distance between two connecting nodes, the interaction alternately occurs between antiferromagnetic and ferromagnetic ones. The long range interaction can also be attained in coupled infinite chains. The quantum gate operations with high precision can be realized even when the fluctuations are included in the system.
Keywords:Quantum Information Processing coupled spin chains
 
 
 

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