Nature Communications (Aug 2021)

Measuring dimensionality and purity of high-dimensional entangled states

  • Isaac Nape,
  • Valeria Rodríguez-Fajardo,
  • Feng Zhu,
  • Hsiao-Chih Huang,
  • Jonathan Leach,
  • Andrew Forbes

DOI
https://doi.org/10.1038/s41467-021-25447-0
Journal volume & issue
Vol. 12, no. 1
pp. 1 – 8

Abstract

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Quantifying dimensionality of high-dimensional entangled states is challenging, especially in the presence of mixedness and noise. Here, the authors propose and demonstrate a method to quantify the dimensionality and purity of a bi-photon HD entangled state, scaling linearly with entanglement dimension.