Control of Exciton Dynamics in Nanodots for Quantum Operations (original) (raw)

Abstract

This work presents a step furthering a new perspective of proactive control of the spin-exciton dynamics in the quantum limit. Laser manipulation of spin-polarized optical excitations in a semiconductor nanodot is used to control the spin dynamics of two interacting excitons. 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 basic quantum computing algorithm demonstrate in theory the feasibility of quantum control.

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References (33)

  1. J.A. Gupta, D.D. Awschalom, X. Peng, and A.P. Alivisatos, Phys. Rev. B 59, 10421 (1999).
  2. N.H. Bonadeo et al., Science 282, 1473 (1998).
  3. G. Chen et al., Science 289, 1906 (2000).
  4. W. S. Warren, H. Rabitz, M. Dahleh, Science 259, 1581 (1993).
  5. M.A. Nielsen and I. Chuang, Quantum Computation and Quantum Information (Cambridge University Press, Cambridge, 2000).
  6. A. Imamoglu et al. Phys. Rev. Lett. 83, 4204 (1999).
  7. T. A. Brun, H. Wang, Phys. Rev. A 61, 032307 (2000).
  8. F. Troiani, U. Hohenester, E. Molinari, Phys. Rev. B 62, R2263 (2000).
  9. E. Biolatti, R. C. Iotti, P. Zanardi, F. Rossi, Phys. Rev. Lett. 85, 5647 (2000).
  10. P. Chen, C. Piermarocchi, and L.J. Sham, Physica E, to be published, preprint in cond-mat/0009307.
  11. A. Barenco, D. Deutsch, A. Ekert, R. Jozsa, Phys. Rev. Lett. 74, 4083 (1995).
  12. G. D. Sanders, K. W. Kim, W. C. Holton, Phys. Rev. B 61, 7526(2000).
  13. M.S. Sherwin, A. Imamoglu and T. Montroy, Phys. Rev. A 60, 3508 (1999).
  14. A.M. Weiner, Prog. Quant. Electr. 19, 161 (1995).
  15. H. K. Cummins, J. A. Jones, New J. of Phys. 2, 6.1-6.12 (2000).
  16. G. P. Berman, D.K. Campbell, V.I. Tsifrinovich, Phys. Rev. B 55, 5929 (1997).
  17. G. Burkard, D. Loss, D. P. Di Vincenzo, J. A. Smolin, Phys. Rev. B 60, 11 404 (1999).
  18. L. Tian, S. Lloyd, Phys. Rev. A 62, 050301 (2000).
  19. G. D. Sanders, K. W. Kim, W. C. Holton, Phys. Rev. B 59, 1098(1999).
  20. D.P. DiVincenzo, Phys. Rev A 51, 1015 (1995).
  21. D. Deutsch, R. Jozsa, Proc. Roy. Soc. London A 439, 553 (1992).
  22. A. Barenco, M. A. Dupertuis, Phys. Rev. B 52, 2766 (1995).
  23. N. H. Bonadeo et al. Phys. Rev. Lett. 81, 2759 (1998).
  24. A. Schülzgen et al., Phys. Rev. Lett. 82, 2346 (1999);
  25. F. Quochi et al., ibidem 80, 4733 (1998).
  26. S. Lloyd, Science 261, 1569 (1993).
  27. P. Chen, C. Piermarocchi, and L. J. Sham, to be pub- lished.
  28. J.F. Poyatos, J.I. Cirac, and P. Zoller, Phys. Rev. Lett. 78, 390 (1997).
  29. K. Mølmer, Y. Castin, J. Dalibard, J. Opt. Soc. Am B 10, 524 (1993);
  30. R. Schack and T. A. Brun, Comp. Phys. Commun. 102, 210 (1997).
  31. I. L. Chuang, L. M. K. Vandersypen, X. Zhou, D. W. Leung, S. Lloyd, Nature 393, 143 (1998);
  32. J. A. Jones, M. Mosca, J. Chem. Phys. 109, 1648 (1998).
  33. Details of pulse sequences are given in the Appendix.