Maximally entangled and GHz-clocked on-demand photon pair source

Caspar Hopfmann; Weijie Nie; Nand Lal Sharma; Carmen Weigelt; Fei Ding; Oliver G. Schmidt

doi:10.1103/PhysRevB.103.075413

Maximally entangled and GHz-clocked on-demand photon pair source

Quantum Physics 2021-06-29 v1 Mesoscale and Nanoscale Physics

Authors: Caspar Hopfmann , Weijie Nie , Nand Lal Sharma , Carmen Weigelt , Fei Ding , Oliver G. Schmidt

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Abstract

We present a 1 GHz-clocked, maximally entangled and on-demand photon pair source based on droplet etched GaAs quantum dots using two-photon excitation. By employing these GaP microlensenhanced devices in conjunction with their substantial brightness, raw entanglement fidelities of up to $0.95 \pm 0.01$ and post-selected photon indistinguishabilities of up to $0.93 \pm 0.01$ , the suitability for quantum repeater based long range quantum entanglement distribution schemes is shown. Comprehensive investigations of a complete set of polarization selective two-photon correlations as well as time resolved Hong-Ou-Mandel interferences facilitate innovative methods that determine quantities such as photon extraction and excitation efficiencies as well as pure dephasing directly - opposed to commonly employed indirect techniques.

Keywords

photon pair generation single-photon sources quantum entanglement

Cite

@article{arxiv.2010.11817,
  title  = {Maximally entangled and GHz-clocked on-demand photon pair source},
  author = {Caspar Hopfmann and Weijie Nie and Nand Lal Sharma and Carmen Weigelt and Fei Ding and Oliver G. Schmidt},
  journal= {arXiv preprint arXiv:2010.11817},
  year   = {2021}
}

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9 pages, 10 figures

Maximally entangled and GHz-clocked on-demand photon pair source

Abstract

Keywords

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