A1 Refereed original research article in a scientific journal

Universality of sequential quantum measurements




AuthorsTeiko Heinosaari, Takayuki Miyadera

PublisherAMER PHYSICAL SOC

Publication year2015

JournalPhysical Review A

Journal name in sourcePHYSICAL REVIEW A

Journal acronymPHYS REV A

Article number022110

Volume91

Issue2

Number of pages6

ISSN1050-2947

DOIhttps://doi.org/10.1103/PhysRevA.91.022110


Abstract

We show that any jointly measurable pair of quantum observables can be obtained in a sequential measurement scheme, even if the second observable will be decided after the first measurement. This means that it is possible to perform a measurement of any quantum observable in a way that does not disturb the subsequent measurements more than is dictated by joint measurability. Only measurements with a specific structure have this universality feature. As a supplementing result, we provide a characterization of all possible joint measurements obtained from a sequential measurement lacking universality.




Last updated on 2024-26-11 at 18:08