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Frontiers in Optics

Joint Quantum Measurements with Minimum Uncertainty

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

Published Jan 1, 2013• 1 citation
Publisher

Abstract

We experimentally test new tight measurement-uncertainty relations using joint measurements of incompatible polarization observables on single photons. Putting state of the art single-photon technology to the test, we compare two independent techniques for estimating inaccuracies.
DOI
10.1364/fio.2013.fw6c.6

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The uncertainty relation is a distinguishing feature of quantum theory, characterizing the incompatibility of noncommuting observables in the preparation of quantum states. Recently, many uncertainty relations were proposed with improved lower bounds and were deemed capable of incorporating multiple observables. Here we report an experimental verification of seven uncertainty relations of this type with single-photon measurements. The results, while confirming these uncertainty relations, show as well the relative stringency of various uncertainty lower bounds.
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