Hybrid double-dot qubit measurement with a quantum point contact

doi:10.1088/1674-1056/23/10/100303

中国物理B ›› 2014, Vol. 23 ›› Issue (10): 100303-100303.doi: 10.1088/1674-1056/23/10/100303

Hybrid double-dot qubit measurement with a quantum point contact

严蕾, 殷雯, 王芳卫

Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

收稿日期:2014-04-30 修回日期:2014-05-19 出版日期:2014-10-15 发布日期:2014-10-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11174358) and the National Basic Research Program of China (Grant No. 2010CB833102).

Hybrid double-dot qubit measurement with a quantum point contact

Yan Lei (严蕾), Yin Wen (殷雯), Wang Fang-Wei (王芳卫)

Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2014-04-30 Revised:2014-05-19 Online:2014-10-15 Published:2014-10-15
Contact: Yin Wen E-mail:wenyin@aphy.iphy.ac.cn
About author:03.65.Yz; 03.67.Lx; 73.63.Kv
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11174358) and the National Basic Research Program of China (Grant No. 2010CB833102).

摘要/Abstract

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.

关键词: measurement, dynamics, dephasing

Abstract: 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.

Key words: measurement, dynamics, dephasing

中图分类号: (Decoherence; open systems; quantum statistical methods)

03.65.Yz

03.67.Lx (Quantum computation architectures and implementations) 73.63.Kv (Quantum dots)

严蕾, 殷雯, 王芳卫. Hybrid double-dot qubit measurement with a quantum point contact[J]. 中国物理B, 2014, 23(10): 100303-100303.

Yan Lei (严蕾), Yin Wen (殷雯), Wang Fang-Wei (王芳卫). Hybrid double-dot qubit measurement with a quantum point contact[J]. Chin. Phys. B, 2014, 23(10): 100303-100303.

参考文献 0


[1]	Kane B E 1998 Nature 393 133 doi: 10.1038/30156

[2]	Loss D and DiVincenzo D P 1998 Phys. Rev. A 57 120 doi: 10.1103/PhysRevA.57.120

[3]	ClarkeEur M L 2014 J. Phys. 35 015021

[4]	DiVincenzo D P 2000 Fortschr. Phys. 48 771 doi: 10.1002/1521-3978(200009)48:9/11<771::AID-PROP771>3.0.CO;2-E

[5]	Mozyrsky D and Martin I 2002 Phys. Rev. Lett. 89 018301 doi: 10.1103/PhysRevLett.89.018301

[6]	Goan H S, Milburn G J, Wiseman H M and Sun H B 2001 Phys. Rev. B 63 125326 doi: 10.1103/PhysRevB.63.125326

[7]	Gurvitz S A 2005 Phys. Rev. B 72 073303 doi: 10.1103/PhysRevB.72.073303

[8]	Gilad T and Gurvitz S A 2006 Phys. Rev. Lett. 97 116806 doi: 10.1103/PhysRevLett.97.116806

[9]	Goan H S and Milburn G J 2001 Phys. Rev. B 64 235307 doi: 10.1103/PhysRevB.64.235307

[10]	Elzerman J M, Hanson R, van Willems, Beveren L H, Witkamp B, Vandersypen L M K and Kouwenhoven L P 2004 Nature 430 431 doi: 10.1038/nature02693

[11]	Johnson A C, Petta J R, Taylor J M, Yacoby A, Lukin M D, Marcus C M, Hanson M P and Gossard A C 2005 Nature 435 925 doi: 10.1038/nature03815

[12]	Petersson K D, Smith C G, Anderson D, Atkinson P, Jones G A C and Ritchie D A 2010 Nano Lett. 10 2789 doi: 10.1021/nl100663w

[13]	Shi Z, Simmons C B, Prance J R, Gamble J K, Koh T S, Shim Y P, Hu X, Savage D E, Lagally M G, Eriksson M A, Friesen M and Coppersmith S N 2012 Phys. Rev. Lett. 108 140503 doi: 10.1103/PhysRevLett.108.140503

[14]	Dial O E, Shulman M D, Harvey S P, Bluhm H, Umansky V and Yacoby A 2013 Phys. Rev. Lett. 110 146804 doi: 10.1103/PhysRevLett.110.146804

[15]	DiVincenzo D P, Bacon D, Kempe J, Burkard G and Whaley K B 2000 Nature 408 339 doi: 10.1038/35042541

[16]	Gurvitz S A and Prager Ya S 1996 Phys. Rev. B 53 15932 doi: 10.1103/PhysRevB.53.15932

[17]	Gurvitz S A 1997 Phys. Rev. B 56 15215 doi: 10.1103/PhysRevB.56.15215

[18]	Blanter Ya M and Büttiker M 2000 Phys. Rep. 336 1 doi: 10.1016/S0370-1573(99)00123-4

[19]	MacDonald D K C 1948 Rep. Prog. Phys. 12 56

[20]	Mozyrsky D, Fedichkin L, Gurvitz S A and Berman G P 2002 Phys. Rev. B 66 161313 doi: 10.1103/PhysRevB.66.161313

[21]	Hanson R, van Beveren L H W, Vink I T, Elzerman J M, Naber W J M, Koppens F H L, Kouwenhoven L P and Vandersypen L M K 2005 Phys. Rev. Lett. 94 196802 doi: 10.1103/PhysRevLett.94.196802

[22]	Luo J Y, Li X Q and Yan Y J 2007 Phys. Rev. B 76 085325 doi: 10.1103/PhysRevB.76.085325

[23]	Korotkov A N 2001 Phys. Rev. B 63 085312 doi: 10.1103/PhysRevB.63.085312

[24]	Lambert N and Nori F 2008 Phys. Rev. B 78 214302 doi: 10.1103/PhysRevB.78.214302

[25]	Elattari B and Gurvitz S A 2002 Phys. Lett. A 292 289 doi: 10.1016/S0375-9601(01)00802-7

[26]	Bennett C H 1995 Phys. Today 48 24

[27]	Korotkov A N and Averin D V 2001 Phys. Rev. B 64 165310 doi: 10.1103/PhysRevB.64.165310

[28]	Elattari B and Gurvitz S A 2000 Phys. Rev. A 62 032102 doi: 10.1103/PhysRevA.62.032102

[29]	Lundeen J S and Bamber C 2012 Phys. Rev. Lett. 108 070402 doi: 10.1103/PhysRevLett.108.070402

[30]	Gustavsson S, Studer M, Leturcq R, Ihn T, Ensslin K, Driscoll D C and Gossard A C 2007 Phys. Rev. Lett. 99 206804 doi: 10.1103/PhysRevLett.99.206804

[31]	Gamble J K, Friesen M, Coppersmith S N and Hu X 2012 Phys. Rev. B 86 035302

[32]	Petersson K D, Petta J R, Lu H and Gossard A C 2010 Phys. Rev. Lett. 105 246804 doi: 10.1103/PhysRevLett.105.246804

[33]	Yan L, Wang H X, Yin W and Wang F W 2014 Chin. Phys. B 23 020305

[34]	Cassidy M C, Dzurak A S, Clark R G, Petersson K D, Farrer I, Ritchie D A and Smith C G 2007 Appl. Phys. Lett. 91 222104 doi: 10.1063/1.2809370

Hybrid double-dot qubit measurement with a quantum point contact

Hybrid double-dot qubit measurement with a quantum point contact

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

参考文献 0

相关文章 15

Metrics

本文评价

推荐阅读 0

[1]	Liping Zhang(张丽萍), Zuyu Xu(徐祖雨), Xiaojie Li(黎晓杰), Xu Zhang(张旭), Mingyang Qin(秦明阳), Ruozhou Zhang(张若舟), Juan Xu(徐娟), Wenxin Cheng(程文欣), Jie Yuan(袁洁), Huabing Wang(王华兵), Alejandro V. Silhanek, Beiyi Zhu(朱北沂), Jun Miao(苗君), and Kui Jin(金魁). Cascade excitation of vortex motion and reentrant superconductivity in flexible Nb thin films[J]. 中国物理B, 2023, 32(4): 47302-047302.
[2]	Z W Liang(梁正伟), P Wu(吴平), L C Wang(王利晨), B G Shen(沈保根), and Zhi-Hong Wang(王志宏). Conductive path and local oxygen-vacancy dynamics: Case study of crosshatched oxides[J]. 中国物理B, 2023, 32(4): 47303-047303.
[3]	Jintao Zheng(郑锦韬), Yang Zhang(张洋), Zaiyang Yu(鱼在洋), Zhiqiang Xiong(熊志强), Hui Luo(罗晖), and Zhiguo Wang(汪之国). Precision measurement and suppression of low-frequency noise in a current source with double-resonance alignment magnetometers[J]. 中国物理B, 2023, 32(4): 40601-040601.
[4]	Junqi Lai(赖君奇), Bowen Chen(陈博文), Zhiwei Xing(邢志伟), Xuefei Li(李雪飞), Shulong Lu(陆书龙), Qi Chen(陈琪), and Liwei Chen(陈立桅). Quantitative measurement of the charge carrier concentration using dielectric force microscopy[J]. 中国物理B, 2023, 32(3): 37202-037202.
[5]	Tianqi Feng(冯天琦), Chengyong Yu(余承勇), En Li(李恩), and Yu Shi(石玉). Application of the body of revolution finite-element method in a re-entrant cavity for fast and accurate dielectric parameter measurements[J]. 中国物理B, 2023, 32(3): 30101-030101.
[6]	Bao Feng(冯宝), Hai-Dong Huang(黄海东), Yu-Xiang Bian(卞宇翔), Wei Jia(贾玮), Xing-Yu Zhou(周星宇), and Qin Wang(王琴). Security of the traditional quantum key distribution protocolswith finite-key lengths[J]. 中国物理B, 2023, 32(3): 30307-030307.
[7]	Lu Yu(于露), Li Cao(曹俐), Ziqian Yue(岳子骞), Lin Li(李林), and Yueyang Zhai(翟跃阳). In situ temperature measurement of vapor based on atomic speed selection[J]. 中国物理B, 2023, 32(2): 20602-020602.
[8]	Cong-Min Ji(祭聪敏), Yusong Tu(涂育松), and Yuan-Yan Wu(吴园燕). Heterogeneous hydration patterns of G-quadruplex DNA[J]. 中国物理B, 2023, 32(2): 28702-028702.
[9]	Tao-Wen Xiong(熊涛文), Xiao-Ping Chen(陈小平), Ye-Ping Lin(林也平), Xin-Fu He(贺新福), Wen Yang(杨文), Wang-Yu Hu(胡望宇), Fei Gao(高飞), and Hui-Qiu Deng(邓辉球). Molecular dynamics study of interactions between edge dislocation and irradiation-induced defects in Fe–10Ni–20Cr alloy[J]. 中国物理B, 2023, 32(2): 20206-020206.
[10]	Peng Xu(许鹏), Ran Zhang(张然), and Sheng-Mei Zhao(赵生妹). Realization of the iSWAP-like gate among the superconducting qutrits[J]. 中国物理B, 2023, 32(2): 20306-020306.
[11]	Zilin Wang(王梓霖), Liang Yang(杨亮), Changsheng Liu(刘长生), and Shiwei Lin(林仕伟). Formation of nanobubbles generated by hydrate decomposition: A molecular dynamics study[J]. 中国物理B, 2023, 32(2): 23101-023101.
[12]	Yan-Ling Li(李艳玲), Yi-Bo Zeng(曾艺博), Lin Yao(姚林), and Xing Xiao(肖兴). Improving the teleportation of quantum Fisher information under non-Markovian environment[J]. 中国物理B, 2023, 32(1): 10303-010303.
[13]	Dao-Xin Liu(刘道信), Jian Cao(曹健), Jin-Bo Yuan(袁金波), Kai-Feng Cui(崔凯枫), Yi Yuan(袁易),Ping Zhang(张平), Si-Jia Chao(晁思嘉), Hua-Lin Shu(舒华林), and Xue-Ren Huang(黄学人). Laboratory demonstration of geopotential measurement using transportable optical clocks[J]. 中国物理B, 2023, 32(1): 10601-010601.
[14]	Qing-Qin Zou(邹青钦), Shuang Lei(雷双), Zhang-Yong Li(李章勇), and Dui Qin(秦对). Effects of adjacent bubble on spatiotemporal evolutions of mechanical stresses surrounding bubbles oscillating in tissues[J]. 中国物理B, 2023, 32(1): 14302-014302.
[15]	Ding-Zong Zhang(张定宗), Xu-Ming Feng(冯旭铭), Jun Ma(马骏), Wen-Feng Guo(郭文峰), Yan-Qing Huang(黄艳清), and Hong-Bo Liu(刘洪波). Linear analysis of plasma pressure-driven mode in reversed shear cylindrical tokamak plasmas[J]. 中国物理B, 2023, 32(1): 15201-015201.