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Ultrafast single electron spin manipulation in 2D semiconductor quantum dots with optimally controlled time-dependent electric fields through spin-orbit coupling

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Abstract

We have studied theoretically the possibility of ultra-fast manipulation of a single electron spin in 2D semiconductor quantum dots, by means of high-frequency time-dependent electric fields. The electron spin degree of freedom is excited through spin-orbit coupling, and the procedure may be enhanced by the presence of a static magnetic field. We use quantum optimal control theory to tailor the temporal profile of the electric field in order to achieve the most effective manipulation. The scheme predicts significant control over spin operations in times of the order of picoseconds – an ultrafast time scale that permits to avoid the effects of decoherence if this scheme is to be used as a tool for quantum information processing.

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Authors and Affiliations

  1. Institute for Biocomputation and Physics of Complex Systems, University of Zaragoza, Mariano Esquillor s/n, 50018, Zaragoza, Spain

    Jorge A. Budagosky Marcilla & Alberto Castro

  2. ARAID Foundation, Edificion CEEI, María Luna 11, 50018, Zaragoza, Spain

    Alberto Castro

Authors
  1. Jorge A. Budagosky Marcilla
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  2. Alberto Castro
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Correspondence to Jorge A. Budagosky Marcilla.

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Budagosky Marcilla, J.A., Castro, A. Ultrafast single electron spin manipulation in 2D semiconductor quantum dots with optimally controlled time-dependent electric fields through spin-orbit coupling. Eur. Phys. J. B 88, 15 (2015). https://doi.org/10.1140/epjb/e2014-50700-5

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  • DOI: https://doi.org/10.1140/epjb/e2014-50700-5

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