Coherent Transport in a Linear Triple Quantum Dot Made from a Pure-Phase   InAs Nanowire

doi:10.1021/acs.nanolett.7b00927

CORC > 北京大学 > 信息科学技术学院

	Coherent Transport in a Linear Triple Quantum Dot Made from a Pure-Phase InAs Nanowire
	Wang, Ji-Yin ; Huang, Shaoyun ; Huang, Guang-Yao ; Pan, Dong ; Zhao, Jianhua ; Xu, H. Q.
刊名	NANO LETTERS
	2017
关键词	Triple quantum dot InAs nanowire cotunneling coherent transport SINGLE-ELECTRON SPIN COMPUTATION EXCHANGE GIANT
DOI	10.1021/acs.nanolett.7b00927
英文摘要	A highly tunable linear triple quantum dot (TQD) device is realized in a single-crystalline pure-phase InAs nanowire using a local finger gate technique. The electrical measurements show that the charge stability diagram of the TQD can be represented by three kinds of current lines of different slopes and a simulation performed based on a capacitance matrix model confirms the experiment. We show that each current line observable in the charge stability diagram is associated with a case where a QD is on resonance with the Fermi level of the source and drain reservoirs. At a triple point where two current lines of different slopes move together but show anticrossing, two QDs are on resonance with the Fermi level of the reservoirs. We demonstrate that an energetically degenerated quadruple point at which all three QDs are on resonance with the Fermi level of the reservoirs can be built by moving two separated triple points together via sophistically tuning of energy levels in the three QDs. We also demonstrate the achievement of direct coherent electron transfer between the two remote QDs in the TQD, realizing a long-distance coherent quantum bus operation. Such a long-distance coherent coupling could be used to investigate coherent spin teleportation and superexchange effects and to construct a spin qubit with an improved long coherent time and with spin state detection solely by sensing the charge states.; Ministry of Science and Technology of China through the National Key Research and Development Program of China [2016YFA0300601, 2016YFA0300800]; National Natural Science Foundation of China [91221202, 91421303, 11274021, 61504133]; Swedish Research Council (VR); SCI(E); ARTICLE; 7; 4158-4164; 17
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/472377]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Wang, Ji-Yin,Huang, Shaoyun,Huang, Guang-Yao,et al. Coherent Transport in a Linear Triple Quantum Dot Made from a Pure-Phase InAs Nanowire[J]. NANO LETTERS,2017.
APA	Wang, Ji-Yin,Huang, Shaoyun,Huang, Guang-Yao,Pan, Dong,Zhao, Jianhua,&Xu, H. Q..(2017).Coherent Transport in a Linear Triple Quantum Dot Made from a Pure-Phase InAs Nanowire.NANO LETTERS.
MLA	Wang, Ji-Yin,et al."Coherent Transport in a Linear Triple Quantum Dot Made from a Pure-Phase InAs Nanowire".NANO LETTERS (2017).