Optimal input states and feedback for interferometric phase estimation

D. W. Berry*, H. M. Wiseman, J. K. Breslin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)


Optimal N-photon two-mode input states for interferometric phase measurements were derived. The derivation proved that realization of canonical measurement by counting photons in the outputs of the interferometer was not possible. A feedback algorithm was introduced based on Bayesian inference to control auxiliary phase shift.

Original languageEnglish
Article number053804
Pages (from-to)1-11
Number of pages11
JournalPhysical Review A. Atomic, Molecular, and Optical Physics
Issue number5
Publication statusPublished - 2001
Externally publishedYes


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