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Advances in High Energy Physics
Volume 2014, Article ID 735398, 6 pages
http://dx.doi.org/10.1155/2014/735398
Research Article

Error-Disturbance Uncertainty Relations in Neutron-Spin Measurements

Atominstitut, Vienna University of Technology, Stadionallee 2, 1020 Vienna, Austria

Received 2 June 2014; Accepted 28 July 2014; Published 8 September 2014

Academic Editor: Guillaume Pignol

Copyright © 2014 Stephan Sponar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The publication of this article was funded by SCOAP3.

Abstract

In his seminal paper, which was published in 1927, Heisenberg originally introduced a relation between the precision of a measurement and the disturbance it induces onto another measurement. Here, we report a neutron-optical experiment that records the error of a spin-component measurement as well as the disturbance caused on a measurement of another spin-component to test error-disturbance uncertainty relations (EDRs). We demonstrate that Heisenberg’s original EDR is violated and the Ozawa and Branciard EDRs are valid in a wide range of experimental parameters.