Quantum Manipulation of Two-Electron Spin States in Isolated Double Quantum Dots

Benoit Bertrand, Hanno Flentje, Shintaro Takada, Michihisa Yamamoto, Seigo Tarucha, Arne Ludwig, Andreas D. Wieck, Christopher Bäuerle, and Tristan Meunier
Phys. Rev. Lett. 115, 096801 – Published 28 August 2015
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Abstract

We studied experimentally the dynamics of the exchange interaction between two antiparallel electron spins in an isolated double quantum dot where coupling to the electron reservoirs can be ignored. We demonstrate that the level of control of such a double dot is higher than in conventional double dots. In particular, it allows us to couple coherently two electron spins in an efficient manner following a scheme initially proposed by Loss and DiVincenzo [Phys. Rev. A 57, 120 (1998)]. The present study demonstrates that isolated quantum dots are a possible route to increase the number of coherently coupled quantum dots.

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  • Received 2 December 2014

DOI:https://doi.org/10.1103/PhysRevLett.115.096801

© 2015 American Physical Society

Authors & Affiliations

Benoit Bertrand1,2, Hanno Flentje1,2, Shintaro Takada1,2,3, Michihisa Yamamoto3,4, Seigo Tarucha3,5, Arne Ludwig6, Andreas D. Wieck6, Christopher Bäuerle1,2, and Tristan Meunier1,2,*

  • 1Université Grenoble Alpes, Institut NEEL, F-38042 Grenoble, France
  • 2CNRS, Institut NEEL, F-38042 Grenoble, France
  • 3Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
  • 4PRESTO-JST, Kawaguchi-shi, Saitama 331-0012, Japan
  • 5RIKEN Center for Emergent Matter Science (CEMS), 2-1 Hirosawa, Wako-Shi, Saitama 31-0198, Japan
  • 6Lehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, Universitätsstrasse 150, 44780 Bochum, Germany

  • *Corresponding author. tristan.meunier@neel.cnrs.fr

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Issue

Vol. 115, Iss. 9 — 28 August 2015

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