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Trapped Ion Quantum Computing

Voltage Induced Hidden Symmetry and Photon Entanglement Generation in a Single, Site-Selected Quantum Dot

arXiv

Authors: Michael E. Reimer, Marek Korkusinski, Jacques Lefebvre, Jean Lapointe, Philip J. Poole, Geof C. Aers, Dan Dalacu, W. Ross McKinnon, Simon Frederick, Pawel Hawrylak, Robin L. Williams

Year

2007

Paper ID

50036

Status

Preprint

Abstract Read

~2 min

Abstract Words

100

Citations

N/A

Abstract

Present proposals for the realisation of entangled photon pair sources using the radiative decay of the biexciton in semiconductor quantum dots are limited by the need to enforce degeneracy of the two intermediate, single exciton states. We show how this requirement is lifted if the biexciton binding energy can be tuned to zero and we demonstrate this unbinding of the biexciton in a single, pre-positioned InAs quantum dot subject to a lateral electric field. Full Configuration-Interaction calculations are presented that reveal how the biexciton is unbound through manipulation of the electron-hole Coulomb interaction and the consequent introduction of Hidden Symmetry.

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Present proposals for the realisation of entangled photon pair sources using the radiative decay of the biexciton in semiconductor quantum dots are limited by the need to...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:0706.1075 [2] arXiv https://arxiv.org/abs/0706.1075 [3] Publisher https://arxiv.org/abs/0706.1075

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