Fundamental gates for a strongly correlated two-electron quantum ring

L. Sælen, E. Waltersson, J. P. Hansen, and E. Lindroth
Phys. Rev. B 81, 033303 – Published 11 January 2010

Abstract

We demonstrate that conditional as well as unconditional basic operations which are necessary for universal quantum gates can be performed with almost 100% fidelity within a strongly interacting two-electron quantum ring. Both sets of operations are based on a quantum control algorithm that optimizes a driving electromagnetic pulse for a given quantum gate. The demonstrated transitions occur on a time scale much shorter than typical decoherence times of the system.

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  • Received 3 November 2009

DOI:https://doi.org/10.1103/PhysRevB.81.033303

©2010 American Physical Society

Authors & Affiliations

L. Sælen1, E. Waltersson2, J. P. Hansen1, and E. Lindroth2

  • 1Department of Physics and Technology, University of Bergen, N-5007 Bergen, Norway
  • 2Fysikum, Stockholm University, AlbaNova, S-106 91 Stockholm, Sweden

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Issue

Vol. 81, Iss. 3 — 15 January 2010

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