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Trapped Ion Quantum Computing

Energy-Tunable Quantum Dot with Minimal Fine Structure Created by Using Simultaneous Electric and Magnetic Fields

arXiv
Authors: M. A. Pooley, A. J. Bennett, R. M. Stevenson, A. J. Shields, I. Farrer, D. A. Ritchie

Year

2015

Paper ID

27904

Status

Preprint

Abstract Read

~2 min

Abstract Words

113

Citations

N/A

Abstract

The neutral biexciton cascade of single quantum dots is a promising source of entangled photon pairs. The character of the entangled state is determined by the energy difference between the excitonic eigenstates known as fine-structure splitting (FSS). Here we reduce the magnitude of the FSS by simultaneously using two independent tuning mechanisms: in-plane magnetic field and vertical electric field. We observe that there exists a minimum possible FSS in each quantum dot which is independent of these tuning mechanisms. However, with simultaneous application of electric and magnetic fields, we show the FSS can be reduced to its minimum value as the energy of emission is tuned over several meV with a 5-T magnet.

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  • This paper contributes to the Trapped-Ion Quantum Computing research area in the Quantum Articles archive.
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  • The neutral biexciton cascade of single quantum dots is a promising source of entangled photon pairs.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1507.07702 [2] arXiv https://arxiv.org/abs/1507.07702 [3] Publisher https://arxiv.org/abs/1507.07702

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