arXiv:2104.11909 [quant-ph]AbstractReferencesReviewsResources
Quantum Disturbance without State Change: Defense of State-Dependent Error-Disturbance Relations
Published 2021-04-24Version 1
The uncertainty principle states that a measurement inevitably disturbs the system, while it is often supposed that a quantum system is not disturbed without state change. Korzekwa, Jennings, and Rudolph [Phys. Rev. A 89, 052108 (2014)] pointed out a conflict between those two views, and concluded that state-dependent formulations of error-disturbance relations are untenable. Here, we reconcile the conflict by showing that a quantum system is disturbed without state change, in favor of the recently obtained universally valid state-dependent error-disturbance relations.
Comments: 6 pages, 1 figure
Categories: quant-ph
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