Singlet-triplet filtering and entanglement in a quantum dot structure

被引：14
|
作者：
Giavaras, G. [1 ]
Jefferson, J. H.
Fearn, M.
Lambert, C. J.
机构：
[1] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England
[2] QinetiQ, Malvern WR14 3PS, Worcs, England
来源：
PHYSICAL REVIEW B | 2007年 / 75卷 / 08期
关键词：
D O I：
10.1103/PhysRevB.75.085302
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We consider two interacting electrons in a semiconductor quantum dot structure, which consists of a small dot within a larger dot, and demonstrate a singlet-triplet filtering mechanism which involves spin-dependent resonances and can generate entanglement. By studying the exact time evolution of singlet and triplet states we show how the degree of both filtering and spin entanglement can be tuned using a time-dependent gate voltage.
引用
收藏
页数：6
相关论文
共 50 条
  • [31] Tunable singlet-triplet splitting in a few-electron Si/SiGe quantum dot
    Shi, Zhan
    Simmons, C. B.
    Prance, J. R.
    Gamble, John King
    Friesen, Mark
    Savage, D. E.
    Lagally, M. G.
    Coppersmith, S. N.
    Eriksson, M. A.
    APPLIED PHYSICS LETTERS, 2011, 99 (23)
  • [32] Low-noise conditional operation of singlet-triplet coupled quantum dot qubits
    Yang, Shuo
    Das Sarma, S.
    PHYSICAL REVIEW B, 2011, 84 (12):
  • [33] The singlet-triplet transition of two interacting electrons in a Frost-Musulin quantum dot
    Khordad, R.
    OPTICAL AND QUANTUM ELECTRONICS, 2024, 56 (04)
  • [34] Inverted singlet-triplet qubit coded on a two-electron double quantum dot
    Mehl, Sebastian
    DiVincenzo, David P.
    PHYSICAL REVIEW B, 2014, 90 (19):
  • [35] Electrical pump-and-probe study of spin singlet-triplet relaxation in a quantum dot
    Sasaki, S
    Fujisawa, T
    Hayashi, T
    Hirayama, Y
    PHYSICAL REVIEW LETTERS, 2005, 95 (05)
  • [36] Application of Tietz Potential to Study Singlet-Triplet Transition of a Two-Electron Quantum Dot
    R.Khordad
    B.Mirhosseini
    Communications in Theoretical Physics, 2014, 62 (07) : 77 - 80
  • [37] Singlet-triplet spin blockade and charge sensing in a few-electron double quantum dot
    Johnson, AC
    Petta, JR
    Marcus, CM
    Hanson, MP
    Gossard, AC
    PHYSICAL REVIEW B, 2005, 72 (16)
  • [38] Application of Tietz Potential to Study Singlet-Triplet Transition of a Two-Electron Quantum Dot
    Khordad, R.
    Mirhosseini, B.
    COMMUNICATIONS IN THEORETICAL PHYSICS, 2014, 62 (01) : 77 - 80
  • [39] Tunneling through a quantum dot in local spin singlet-triplet crossover region with Kondo effect
    Izumida, W
    Sakai, O
    Tarucha, S
    PHYSICAL REVIEW LETTERS, 2001, 87 (21) : 216803 - 1
  • [40] Didehydrophenanthrenes:: Structure, singlet-triplet splitting, and aromaticity
    Poater, Jordi
    Bickelhaupt, F. Matthias
    Sola, Miquel
    JOURNAL OF PHYSICAL CHEMISTRY A, 2007, 111 (23): : 5063 - 5070
12345