Quantum computation with quantum dots

Phys. Rev. A 57, 120 – Published 1 January 1998
Daniel Loss and David P. DiVincenzo


We propose an implementation of a universal set of one- and two-quantum-bit gates for quantum computation using the spin states of coupled single-electron quantum dots. Desired operations are effected by the gating of the tunneling barrier between neighboring dots. Several measures of the gate quality are computed within a recently derived spin master equation incorporating decoherence caused by a prototypical magnetic environment. Dot-array experiments that would provide an initial demonstration of the desired nonequilibrium spin dynamics are proposed.

DOI: http://dx.doi.org/10.1103/PhysRevA.57.120

  • Received 9 January 1997
  • Revised 22 July 1997
  • Published in the issue dated January 1998

© 1998 The American Physical Society

Authors & Affiliations

Daniel Loss1,2,* and David P. DiVincenzo1,3,†

  • 1Institute for Theoretical Physics, University of California, Santa Barbara, Santa Barbara, California 93106-4030
  • 2Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland
  • 3IBM Research Division, T.J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598

  • *Electronic address: loss@ubaclu.unibas.ch
  • Electronic address: divince@watson.ibm.com

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