A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Quantum measurements on finite dimensional systems: relabeling and mixing
Tekijät: Haapasalo E, Heinosaari T, Pellonpaa JP
Kustantaja: SPRINGER
Julkaisuvuosi: 2012
Journal: Quantum Information Processing
Tietokannassa oleva lehden nimi: QUANTUM INFORMATION PROCESSING
Lehden akronyymi: QUANTUM INF PROCESS
Numero sarjassa: 6
Vuosikerta: 11
Numero: 6
Aloitussivu: 1751
Lopetussivu: 1763
Sivujen määrä: 13
ISSN: 1570-0755
DOI: https://doi.org/10.1007/s11128-011-0330-2
Rinnakkaistallenteen osoite: https://research.utu.fi/converis/portal/detail/Publication/2781628
Quantum measurements are mathematically described by positive operator valued measures (POVMs). Concentrating on finite dimensional systems, we show that one can limit to extremal rank-1 POVMs if two simple procedures of mixing and relabeling are permitted. We demonstrate that any finite outcome POVM can be obtained from extremal rank-1 POVMs with these two procedures. In particular, extremal POVMs with higher rank are just relabelings of extremal rank-1 POVMs and their structure is therefore clarified.
Ladattava julkaisu This is an electronic reprint of the original article. |  |
