Weak-value amplification: state of play Journal Article uri icon



  • AbstractWeak values arise in quantum theory when the result of a weak measurement is conditioned on a subsequent strong measurement. The majority of the trials are discarded, leaving only very few successful events. Intriguingly those can display a substantial signal amplification. This raises the question of whether weak values carry potential to improve the performance of quantum sensors, and indeed a number of impressive experimental results suggested this may be the case. By contrast, recent theoretical studies have found the opposite: using weak-values to obtain an amplification generally worsens metrological performance. This survey summarises the implications of those studies, which call for a reappraisal of weak values’ utility and for further work to reconcile theory and experiment.

publication date

  • January 1, 2016

has restriction

  • gold

Date in CU Experts

  • May 13, 2020 9:54 AM

Full Author List

  • Knee GC; Combes J; Ferrie C; Gauger EM

author count

  • 4

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 2299-114X

Additional Document Info


  • 3


  • 1