Proof of Heisenberg's ErrorDisturbance Relation
Abstract
While the slogan “no measurement without disturbance” has established itself under the name of the Heisenberg effect in the consciousness of the scientifically interested public, a precise statement of this fundamental feature of the quantum world has remained elusive, and serious attempts at rigorous formulations of it as a consequence of quantum theory have led to seemingly conflicting preliminary results. Here we show that despite recent claims to the contrary [L. Rozema et al, Phys. Rev. Lett. 109, 100404 (2012)], Heisenbergtype inequalities can be proven that describe a tradeoff between the precision of a position measurement and the necessary resulting disturbance of momentum (and vice versa). More generally, these inequalities are instances of an uncertainty relation for the imprecisions of any joint measurement of position and momentum. Measures of error and disturbance are here defined as figures of merit characteristic of measuring devices. As such they are state independent, each giving worstcase estimates across all states, in contrast to previous work that is concerned with the relationship between error and disturbance in an individual state.
 Publication:

Physical Review Letters
 Pub Date:
 October 2013
 DOI:
 10.1103/PhysRevLett.111.160405
 arXiv:
 arXiv:1306.1565
 Bibcode:
 2013PhRvL.111p0405B
 Keywords:

 03.65.Ta;
 03.65.Db;
 03.67.a;
 Foundations of quantum mechanics;
 measurement theory;
 Functional analytical methods;
 Quantum information;
 Quantum Physics
 EPrint:
 Version 2 contains a more explicit description of the significance of the errordisturbance relation, formulated here for figures of merit of measuring devices, and its contrast with approaches that use statedependent measures of error and disturbance