Maximally incompatible quantum observables

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Authors

HEINOSAARI Teiko SCHULTZ Jussi TOIGO Alessandro ZIMAN Mário

Year of publication 2014
Type Article in Periodical
Magazine / Source Physics Letters A
MU Faculty or unit

Faculty of Informatics

Citation
Web http://dx.doi.org/10.1016/j.physleta.2014.04.026
Doi http://dx.doi.org/10.1016/j.physleta.2014.04.026
Field Theoretical physics
Keywords quantum incompatibility - quantum cloning - quantum measurements
Description The existence of maximally incompatible quantum observables in the sense of a minimal joint measurability region is investigated. Employing the universal quantum cloning device it is argued that only infinite dimensional quantum systems can accommodate maximal incompatibility. It is then shown that two of the most common pairs of complementary observables (position and momentum; number and phase) are maximally incompatible.
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