Voltage-controlled coded qubit based on electron spin

被引：54
作者：
Hawrylak, P [1 ]
Korkusinski, M [1 ]
机构：
[1] Natl Res Council Canada, Inst Microstruct Sci, Quantum Theory Grp, Ottawa, ON K1A 0R6, Canada
来源：
SOLID STATE COMMUNICATIONS | 2005年 / 136卷 / 9-10期
基金：
加拿大自然科学与工程研究理事会;
关键词：
quantum dots; quantum computation; solid-state qubit;
D O I：
10.1016/j.ssc.2005.09.026
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We design and analyze a solid-state qubit based on the electron spin and controlled by electrical means. The coded qubit is composed of a three-electron complex in three tunable gated quantum dots. The two logical states of a qubit, vertical bar 0L > and vertical bar 1L >, reside in a degenerate subspace of total spin S = 1/2 states. We demonstrate how applying voltages to specific gates changes the one-electron properties of the structure, and show how electron-electron interaction translates these changes into the manipulation of the two lowest energy states of the three-electron complex. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：508 / 512
页数：5
相关论文
共 36 条
  • [1] Electrons in artificial atoms
    Ashoori, RC
    [J]. NATURE, 1996, 379 (6564) : 413 - 419
  • [2] Electron spin and optical coherence in semiconductors
    Awschalom, DD
    Kikkawa, JM
    [J]. PHYSICS TODAY, 1999, 52 (06) : 33 - 38
  • [3] Universal fault-tolerant quantum computation on decoherence-free subspaces
    Bacon, D
    Kempe, J
    Lidar, DA
    Whaley, KB
    [J]. PHYSICAL REVIEW LETTERS, 2000, 85 (08) : 1758 - 1761
  • [4] Switching in a reversible spin logic gate
    Bandyopadhyay, S
    Roychowdhury, VP
    [J]. SUPERLATTICES AND MICROSTRUCTURES, 1997, 22 (03) : 411 - 416
  • [5] SUPERCOMPUTING WITH SPIN-POLARIZED SINGLE ELECTRONS IN A QUANTUM COUPLED ARCHITECTURE
    BANDYOPADHYAY, S
    DAS, B
    MILLER, AE
    [J]. NANOTECHNOLOGY, 1994, 5 (02) : 113 - 133
  • [6] Coupling and entangling of quantum states in quantum dot molecules
    Bayer, M
    Hawrylak, P
    Hinzer, K
    Fafard, S
    Korkusinski, M
    Wasilewski, ZR
    Stern, O
    Forchel, A
    [J]. SCIENCE, 2001, 291 (5503) : 451 - 453
  • [7] Quantum information and computation
    Bennett, CH
    DiVincenzo, DP
    [J]. NATURE, 2000, 404 (6775) : 247 - 255
  • [8] Coupled quantum dots as quantum exclusive-OR gate
    Brum, JA
    Hawrylak, P
    [J]. SUPERLATTICES AND MICROSTRUCTURES, 1997, 22 (03) : 431 - 436
  • [9] Single-electron computing without dissipation
    Bychkov, AM
    Openov, LA
    Semenihin, IA
    [J]. JETP LETTERS, 1997, 66 (04) : 298 - 303
  • [10] Readout of a single electron spin based quantum bit by current detection
    Ciorga, M
    Sachrajda, AS
    Hawrylak, P
    Gould, C
    Zawadzki, P
    Feng, Y
    Wasilewski, Z
    [J]. PHYSICA E, 2001, 11 (01): : 35 - 40
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