Experimental realization of the Bruschweiler

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	Experimental realization of the Bruschweiler
	Long, GL; Xiao, L; Yan, HY; Sun, Y; Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.
刊名	JOURNAL OF CHEMICAL PHYSICS
	2002
卷号	117 期号:7 页码:3310-3315
关键词	Nuclear-magnetic-resonance Spin Liouville Space Quantum Computation Nmr-spectroscopy Logic Gates
ISSN号	0021-9606
英文摘要	Compared with classical search algorithms, Grover quantum algorithm [L. K. Grover, Phys. Rev. Lett. 79, 325 (1997)] achieves quadratic speedup and Bruschweiler hybrid quantum algorithm [R. Bruschweiler, Phys. Rev. Lett. 85, 4815 (2000)] achieves an exponential speedup. In this paper, we report the experimental realization of the Bruschweiler algorithm in a three-qubit nuclear magnetic resonance ensemble system. The pulse sequences are used for the algorithms and the measurement method used here is improved on that used by Bruschweiler, namely, instead of quantitatively measuring the spin projection of the ancilla bit, we utilize the shape of the ancilla bit spectrum. By simply judging the downwardness or upwardness of the corresponding peaks in an ancilla bit spectrum, the bit value of the marked state can be read out, especially the geometric nature of this read-out can make the results more robust against errors. (C) 2002 American Institute of Physics.
学科主题	Physics
URL标识	查看原文
公开日期	2012-08-29
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/13462]
专题	理论物理研究所_理论物理所1978-2010年知识产出
通讯作者	Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China.
推荐引用方式 GB/T 7714	Long, GL,Xiao, L,Yan, HY,et al. Experimental realization of the Bruschweiler[J]. JOURNAL OF CHEMICAL PHYSICS,2002,117(7):3310-3315.
APA	Long, GL,Xiao, L,Yan, HY,Sun, Y,&Long, GL , Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China..(2002).Experimental realization of the Bruschweiler.JOURNAL OF CHEMICAL PHYSICS,117(7),3310-3315.
MLA	Long, GL,et al."Experimental realization of the Bruschweiler".JOURNAL OF CHEMICAL PHYSICS 117.7(2002):3310-3315.