Exchange coupling in silicon double quantum dots

Yoko Hada, Mikio Eto

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

An exchange coupling between localized electron spins is evaluated in silicon double quantum dots, taking account of electron-electron interaction exactly. A multivalley structure of conduction band is taken into account within the effective mass approximation. We show that the intervalley tunneling between the quantum dots plays an important role in the exchange coupling. The exchange coupling can be controlled by gating the central electrode of the double quantum dots, which is applicable to two-qubit gate operation for quantum computation using the electron spins.

Original languageEnglish
Pages (from-to)7329-7336
Number of pages8
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number10
DOIs
Publication statusPublished - 2004 Oct

Fingerprint

Exchange coupling
Semiconductor quantum dots
quantum dots
electron spin
Silicon
silicon
Electron-electron interactions
Quantum computers
Electrons
quantum computation
Conduction bands
conduction bands
electron scattering
Electrodes
electrodes
approximation
electrons

Keywords

  • Double quantum dot
  • Exchange coupling
  • Multivalley
  • Quantum computation
  • Silicon

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Exchange coupling in silicon double quantum dots. / Hada, Yoko; Eto, Mikio.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 43, No. 10, 10.2004, p. 7329-7336.

Research output: Contribution to journalArticle

@article{c8af92af6d6b4a2bb08d436ec3c0fe5d,
title = "Exchange coupling in silicon double quantum dots",
abstract = "An exchange coupling between localized electron spins is evaluated in silicon double quantum dots, taking account of electron-electron interaction exactly. A multivalley structure of conduction band is taken into account within the effective mass approximation. We show that the intervalley tunneling between the quantum dots plays an important role in the exchange coupling. The exchange coupling can be controlled by gating the central electrode of the double quantum dots, which is applicable to two-qubit gate operation for quantum computation using the electron spins.",
keywords = "Double quantum dot, Exchange coupling, Multivalley, Quantum computation, Silicon",
author = "Yoko Hada and Mikio Eto",
year = "2004",
month = "10",
doi = "10.1143/JJAP.43.7329",
language = "English",
volume = "43",
pages = "7329--7336",
journal = "Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes",
issn = "0021-4922",
publisher = "Japan Society of Applied Physics",
number = "10",

}

TY - JOUR

T1 - Exchange coupling in silicon double quantum dots

AU - Hada, Yoko

AU - Eto, Mikio

PY - 2004/10

Y1 - 2004/10

N2 - An exchange coupling between localized electron spins is evaluated in silicon double quantum dots, taking account of electron-electron interaction exactly. A multivalley structure of conduction band is taken into account within the effective mass approximation. We show that the intervalley tunneling between the quantum dots plays an important role in the exchange coupling. The exchange coupling can be controlled by gating the central electrode of the double quantum dots, which is applicable to two-qubit gate operation for quantum computation using the electron spins.

AB - An exchange coupling between localized electron spins is evaluated in silicon double quantum dots, taking account of electron-electron interaction exactly. A multivalley structure of conduction band is taken into account within the effective mass approximation. We show that the intervalley tunneling between the quantum dots plays an important role in the exchange coupling. The exchange coupling can be controlled by gating the central electrode of the double quantum dots, which is applicable to two-qubit gate operation for quantum computation using the electron spins.

KW - Double quantum dot

KW - Exchange coupling

KW - Multivalley

KW - Quantum computation

KW - Silicon

UR - http://www.scopus.com/inward/record.url?scp=10844220794&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=10844220794&partnerID=8YFLogxK

U2 - 10.1143/JJAP.43.7329

DO - 10.1143/JJAP.43.7329

M3 - Article

AN - SCOPUS:10844220794

VL - 43

SP - 7329

EP - 7336

JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

SN - 0021-4922

IS - 10

ER -