Experimental Joint Quantum Measurements with Minimum Uncertainty

Martin Ringbauer, Devon N. Biggerstaff, Matthew A. Broome, Alessandro Fedrizzi, Cyril Branciard, Andrew G. White

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Abstract

Quantum physics constrains the accuracy of joint measurements of incompatible observables. Here we test tight measurement-uncertainty relations using single photons. We implement two independent, idealized uncertainty-estimation methods, the three-state method and the weak-measurement method, and adapt them to realistic experimental conditions. Exceptional quantum state fidelities of up to 0.999 98(6) allow us to verge upon the fundamental limits of measurement uncertainty.

Original languageEnglish
Article number020401
Number of pages5
JournalPhysical Review Letters
Volume112
Issue number2
DOIs
Publication statusPublished - 15 Jan 2014

Keywords

  • DISTURBANCE
  • REFORMULATION
  • OBSERVABLES

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