Average number is an insufficient metric for interferometry

Dominic Branford*, Jesús Rubio

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
1 Downloads (Pure)


We argue that analysing schemes for metrology solely in terms of the average particle number can obscure the number of particles effectively used in informative events. For a number of states we demonstrate that, in both frequentist and Bayesian frameworks, the average number of a state can essentially be decoupled from the aspects of the total number distribution associated with any metrological advantage.

Original languageEnglish
Article number123041
JournalNew Journal of Physics
Publication statusPublished - 22 Dec 2021

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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