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Universality of sequential quantum measurements




TekijätTeiko Heinosaari, Takayuki Miyadera

KustantajaAMER PHYSICAL SOC

Julkaisuvuosi2015

JournalPhysical Review A

Tietokannassa oleva lehden nimiPHYSICAL REVIEW A

Lehden akronyymiPHYS REV A

Artikkelin numero022110

Vuosikerta91

Numero2

Sivujen määrä6

ISSN1050-2947

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


Tiivistelmä

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