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Foundations of Physics

, Volume 44, Issue 1, pp 71–90 | Cite as

Complete Measurements of Quantum Observables

  • Juha-Pekka Pellonpää
Article

Abstract

We define a complete measurement of a quantum observable (POVM) as a measurement of the maximally refined (rank-1) version of the POVM. Complete measurements give information on the multiplicities of the measurement outcomes and can be viewed as state preparation procedures. We show that any POVM can be measured completely by using sequential measurements or maximally refinable instruments. Moreover, the ancillary space of a complete measurement can be chosen to be minimal.

Keywords

Quantum observable Positive operator valued measure Instrument Measurement model Rank-1 observable Maximally refined observable Sequential measurement 

Notes

Acknowledgements

This work was supported by the Academy of Finland grant No. 138135.

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Turku Centre for Quantum Physics, Department of Physics and AstronomyUniversity of TurkuTurkuFinland

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