Operation of the qubit based on photon-assisted tunneling in a coupled quantum-dot system and the influence of dephasing

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	Operation of the qubit based on photon-assisted tunneling in a coupled quantum-dot system and the influence of dephasing
	Jiang ZT ; Peng J ; You JQ ; Zheng HZ
刊名	physical review b
	2002
卷号	65 期号:15 页码:art.no.153308
关键词	ARTIFICIAL MOLECULE RATE-EQUATIONS TRANSPORT SPECTROSCOPY DETECTOR INTRADOT STATES
ISSN号	1098-0121
通讯作者	jiang zt,chinese acad sci,inst semicond,natl lab superlattices & microstruct,pob 912,beijing 100083,peoples r china.
中文摘要	we derive the generalized rate equation for the coupled quantum-dot (qd) system irradiated by a microwave field in the presence of a quantum point contact. it is shown that when a microwave field is tuned in resonance with the energy difference between the ground states of two qd's, the photon-assisted tunneling occurs and, as a result, the coupled qd system may be used as the single qubit. furthermore, we show that the oscillating current through the detector decays drastically as the dephasing rate increases, indicating clearly the influence of the dephasing effect induced by the quantum point contact used as a detecting device.
学科主题	半导体物理
收录类别	SCI
语种	英语
公开日期	2010-08-12
内容类型	期刊论文
源URL	[http://ir.semi.ac.cn/handle/172111/11924]
专题	半导体研究所_中国科学院半导体研究所（2009年前）
推荐引用方式 GB/T 7714	Jiang ZT,Peng J,You JQ,et al. Operation of the qubit based on photon-assisted tunneling in a coupled quantum-dot system and the influence of dephasing[J]. physical review b,2002,65(15):art.no.153308.
APA	Jiang ZT,Peng J,You JQ,&Zheng HZ.(2002).Operation of the qubit based on photon-assisted tunneling in a coupled quantum-dot system and the influence of dephasing.physical review b,65(15),art.no.153308.
MLA	Jiang ZT,et al."Operation of the qubit based on photon-assisted tunneling in a coupled quantum-dot system and the influence of dephasing".physical review b 65.15(2002):art.no.153308.