Experimental Joint Quantum Measurements with Minimum Uncertainty
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.
- Publication:
-
Physical Review Letters
- Pub Date:
- January 2014
- DOI:
- 10.1103/PhysRevLett.112.020401
- arXiv:
- arXiv:1308.5688
- Bibcode:
- 2014PhRvL.112b0401R
- Keywords:
-
- 03.65.Ta;
- 03.67.-a;
- 42.50.Ex;
- 42.50.Xa;
- Foundations of quantum mechanics;
- measurement theory;
- Quantum information;
- Optical implementations of quantum information processing and transfer;
- Optical tests of quantum theory;
- Quantum Physics
- E-Print:
- 13 pages, 12 figures