Experimental Joint Quantum Measurements with Minimum Uncertainty

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

doi:10.1103/PhysRevLett.112.020401

Experimental Joint Quantum Measurements with Minimum Uncertainty

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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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 language	English
Article number	020401
Number of pages	5
Journal	Physical Review Letters
Volume	112
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.112.020401
Publication status	Published - 15 Jan 2014

Keywords

DISTURBANCE
REFORMULATION
OBSERVABLES

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10.1103/PhysRevLett.112.020401

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© 2014 American Physical Society. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Physical Society. The following article appeared in Phys. Rev. Lett. 112, 020401 (2014) and may be found at http://dx.doi.org/10.1103/PhysRevLett.112.020401
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Alessandro Fedrizzi
- A.Fedrizzihw.acuk
- School of Engineering & Physical Sciences - Professor
- School of Engineering & Physical Sciences, Institute of Photonics and Quantum Sciences - Professor
Person: Academic (Research & Teaching)

Cite this

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Experimental Joint Quantum Measurements with Minimum Uncertainty

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Alessandro Fedrizzi

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