Nature Communications (Nov 2018)

Experimental optical phase measurement approaching the exact Heisenberg limit

  • Shakib Daryanoosh,
  • Sergei Slussarenko,
  • Dominic W. Berry,
  • Howard M. Wiseman,
  • Geoff J. Pryde

DOI
https://doi.org/10.1038/s41467-018-06601-7
Journal volume & issue
Vol. 9, no. 1
pp. 1 – 6

Abstract

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Measurements of an unknown optical phase have not yet been performed with the ultimate precision, i.e. saturating the Heisenberg limit. Here, Daryanoosh et al. demonstrate this with a precision within 4% of the Heisenberg limit by combining photonic entanglement and multiple passes.