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Fundamental gates for a strongly correlated two-electron quantum ring

Source: Phys. Rev. B 81, 033303 (2010); doi:10.1103/PhysRevB.81.033303

Published 11 January 2010

PACS
  • 78.67.-n
    Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures
  • 03.67.Lx
    Quantum computation architectures and implementations
  • 85.35.Be
    Quantum well devices
  • YEAR: 2010
PUBLICATION DATA
ISSN:
1553-9601 (online)
Publisher:
AIP is a member of CrossRef APS
L. Sælen,1 E. Waltersson,2 J. P. Hansen,1 and E. Lindroth2
1Department of Physics and Technology, University of Bergen, N-5007 Bergen, Norway
2Fysikum, Stockholm University, AlbaNova, S-106 91 Stockholm, Sweden
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. ©2010 The American Physical Society
History: Received 3 November 2009; published 11 January 2010
Permalink: http://link.aps.org/abstract/PRB/v81/e033303
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