A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Generalized coherent states and extremal positive operator valued measures
Tekijät: Heinosaari T, Pellonpaa JP
Kustantaja: IOP PUBLISHING LTD
Julkaisuvuosi: 2012
Journal: Journal of Physics A: Mathematical and Theoretical
Tietokannassa oleva lehden nimi: JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
Lehden akronyymi: J PHYS A-MATH THEOR
Artikkelin numero: ARTN 244019
Numero sarjassa: 24
Vuosikerta: 45
Numero: 24
Sivujen määrä: 12
ISSN: 1751-8113
DOI: https://doi.org/10.1088/1751-8113/45/24/244019
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/3147664
We present a correspondence between positive operator valued measures (POVMs) and sets of generalized coherent states. POVMs describe quantum observables and, similar to quantum states, quantum observables can also be mixed. We show how the formalism of generalized coherent states leads to a useful characterization of extremal POVMs. We prove that covariant phase-space observables related to squeezed states are extremal, while those related to number states are not extremal.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
