Control of Exciton Dynamics in Nanodots for Quantum Operations

Phys. Rev. Lett. 87, 067401 – Published 18 July 2001
Pochung Chen, C. Piermarocchi, and L. J. Sham

Abstract

We present a theory to further a new perspective of proactive control of exciton dynamics in the quantum limit. Circularly polarized optical pulses in a semiconductor nanodot are used to control the dynamics of two interacting excitons of opposite polarizations. Shaping of femtosecond laser pulses keeps the quantum operation within the decoherence time. Computation of the fidelity of the operations and application to the complete solution of a minimal quantum computing algorithm demonstrate in theory the feasibility of quantum control.

DOI: http://dx.doi.org/10.1103/PhysRevLett.87.067401

  • Received 28 February 2001
  • Published 18 July 2001

© 2001 The American Physical Society

Authors & Affiliations

Pochung Chen, C. Piermarocchi, and L. J. Sham

  • Department of Physics, University of California–San Diego, La Jolla, California 92093-0319

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