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arXiv · 1202.5943

Fast preparation of single hole spin in InAs/GaAs quantum dot in Voigt geometry magnetic field

T. M. Godden·J. H. Quilter·A. J. Ramsay·Yanwen Wu·P. Brereton·I. J. Luxmoore·J. Puebla·A. M. Fox·M. S. Skolnick
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Abstract

The preparation of a coherent heavy-hole spin via ionization of a spin-polarized electron-hole pair in an InAs/GaAs quantum dot in a Voigt geometry magnetic field is investigated. For a dot with a 17 ueV bright-exciton fine-structure splitting, the fidelity of the spin preparation is limited to 0.75, with optimum preparation occurring when the effective fine-structure of the bright-exciton matches the in-plane hole Zeeman energy. In principle, higher fidelities can be achieved by minimizing the bright-exciton fine-structure splitting.

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T. M. Godden, J. H. Quilter, A. J. Ramsay, Yanwen Wu, P. Brereton, I. J. Luxmoore, J. Puebla, A. M. Fox, M. S. Skolnick. 2012-02-27. Fast preparation of single hole spin in InAs/GaAs quantum dot in Voigt geometry magnetic field. https://doi.org/10.1103/physrevb.85.155310 10.1103/physrevb.85.155310 10.1103/physrevb.85.155310 10.1103/physrevb.85.155310

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