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Dynamics of spin-flip photon-assisted tunneling

F. R. Braakman, J. Danon, L. R. Schreiber, W. Wegscheider, and L. M. K. Vandersypen
Phys. Rev. B 89, 075417 – Published 18 February 2014

Abstract

We present time-resolved measurements of spin-flip photon-assisted tunneling and spin-flip relaxation in a doubly occupied double quantum dot. The photon-assisted excitation rate as a function of magnetic field indicates that spin-orbit coupling is the dominant mechanism behind the spin-flip under the present conditions. We are able to extract the resulting effective “spin-flip tunneling” energy, which is found to be three orders of magnitude smaller than the regular spin-conserving tunneling energy. We also measure the relaxation and dephasing times of a qubit formed out of two two-electron states with different spin and charge configurations.

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  • Received 26 December 2013
  • Revised 2 February 2014

DOI:https://doi.org/10.1103/PhysRevB.89.075417

©2014 American Physical Society

Authors & Affiliations

F. R. Braakman1,2, J. Danon3,4, L. R. Schreiber1,5, W. Wegscheider6, and L. M. K. Vandersypen1

  • 1Kavli Institute of Nanoscience, TU Delft, 2600 GA Delft, The Netherlands
  • 2Department of Physics, University of Basel, 4056 Basel, Switzerland
  • 3Dahlem Center for Complex Quantum Systems, Freie Universität Berlin, Germany
  • 4Niels Bohr International Academy, Niels Bohr Institute, University of Copenhagen, Denmark
  • 5II. Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany
  • 6Solid State Physics Laboratory, ETH Zürich, 8093 Zürich, Switzerland

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Issue

Vol. 89, Iss. 7 — 15 February 2014

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