Quantum measurements constrained by symmetries

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We revisit the theorem of Wigner, Araki and Yanase (WAY) describing limitations to repeatable quantum measurements that arise from the presence of conservation laws. We will review a strengthening of this theorem by exhibiting and discussing a condition that has hitherto not been identified as a relevant factor. We will also show that an extension of the theorem to continuous variables such as position and momentum can be obtained if the degree of repeatability is suitably quantified.
Original languageEnglish
Title of host publicationSymmetries and groups in contemporary physics
Subtitle of host publicationProceedings of the XXIX International Colloquium on Group-Theoretical Methods in Physics
EditorsChengming Bai, Jean-Pierre Gazeau, Mo-Lin Ge
Place of PublicationSingapore
PublisherWorld Scientific Publishing
Pages587-592
Number of pages6
Volume11
ISBN (Electronic)978-981-4518-56-7
ISBN (Print)978-981-4518-54-3
DOIs
Publication statusPublished - Sep 2013
EventThe XXIX International Colloquium on Group-Theoretical Methods in Physics - Chern Institute of Mathematics, Tianjin, China
Duration: 20 Aug 201226 Aug 2012

Publication series

NameNankai Series in Pure, Applied Mathematics and Theoretical Physics
PublisherWorld Scientific Publishing
Volume11

Conference

ConferenceThe XXIX International Colloquium on Group-Theoretical Methods in Physics
Country/TerritoryChina
CityTianjin
Period20/08/1226/08/12

Keywords

  • quant-ph
  • 81P15

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