Hybrid double-dot qubit measurement with a quantum point contact

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	Hybrid double-dot qubit measurement with a quantum point contact
	Yan, L ; Yin, W ; Wang, FW
刊名	CHINESE PHYSICS B
	2014
卷号	23 期号:10
关键词	measurement dynamics dephasing
ISSN号	1674-1056
通讯作者	Yin, W (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
中文摘要	We present the measurement of a hybrid double-dot qubit using a quantum point contact (QPC). To study the dynamics, we derive the rate equations of the entire system. Numerical results show that QPC current can directly reflect the evolution of the qubit. By adjusting Coulomb interaction, energy mismatch, and QPC tunneling rate, the efficiency and dephasing time can be improved. In addition, the initial state with a hybrid triplet state is superior to that with the purely triplet states on the efficiency. Moreover, the decoherence time is estimated on the magnitude of a microsecond, long enough to implement quantum operations.
资助信息	National Natural Science Foundation of China [11174358]; National Basic Research Program of China [2010CB833102]
语种	英语
公开日期	2015-04-14
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/58974]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Yan, L,Yin, W,Wang, FW. Hybrid double-dot qubit measurement with a quantum point contact[J]. CHINESE PHYSICS B,2014,23(10).
APA	Yan, L,Yin, W,&Wang, FW.(2014).Hybrid double-dot qubit measurement with a quantum point contact.CHINESE PHYSICS B,23(10).
MLA	Yan, L,et al."Hybrid double-dot qubit measurement with a quantum point contact".CHINESE PHYSICS B 23.10(2014).