Spin-selective electron transfer in a quantum dot array

Shumpei Masuda, Kuan Yen Tan, and Mikio Nakahara
Phys. Rev. B 97, 045418 – Published 17 January 2018

Abstract

We propose a spin-selective coherent electron transfer in a silicon quantum dot array. Oscillating magnetic fields and temporally controlled gate voltages are utilized to separate the electron wave function into different quantum dots depending on the spin state. We introduce a nonadiabatic protocol based on π pulses and an adiabatic protocol which offer fast electron transfer and robustness against the error in the control-field pulse area, respectively. We also study a shortcut-to-adiabaticity protocol which compromises these two protocols. We show that this scheme can be extended to multielectron systems straightforwardly and used for nonlocal manipulations of electrons.

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  • Received 4 October 2017

DOI:https://doi.org/10.1103/PhysRevB.97.045418

©2018 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyCondensed Matter, Materials & Applied Physics

Authors & Affiliations

Shumpei Masuda1,2,*, Kuan Yen Tan1, and Mikio Nakahara3,4

  • 1QCD Labs, Department of Applied Physics, Aalto University, Aalto 00076, Finland
  • 2College of Liberal Arts and Sciences, Tokyo Medical and Dental University, Ichikawa, 272-0827, Japan
  • 3Department of Mathematics, Shanghai University, 99 Shangda Road, Shangai, 200444, China
  • 4Research Center for Quantum Computing and Department of Physics, Kindai University, Higashi-Osaka, 577-8502, Japan

  • *masulas@tmd.ac.jp

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Issue

Vol. 97, Iss. 4 — 15 January 2018

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