Testing the reality of Wigner's friend's experience

Kok Wei Bong, Aníbal Utreras-Alarcón, Farzad Ghafari, Yeong Cherng Liang, Nora Tischler, Eric G. Cavalcanti, Geoff J. Pryde, Howard M. Wiseman

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

1 Citation (Scopus)

Abstract

Quantum mechanics is a robust theory which pro duces highly accurate predictions. Despite its successes, it is still plagued with controversies like the measure-ment problem. In short, the measurement problem is the conflict between the evolution of the wavefunction described by Schrödinger's equation and the apparent collapse of the wavefunction after a measurement is done. The Wigner's friend paradox illustrates the conflict be-tween the two rules. In the thought experiment, we consider an observer (Wigner's friend) who is able to per-form measurement on the quantum system and assign a quantum state. Wigner is a super-observer who is able to measure the laboratory his friend is in and also as-sign a quantum state. This process, however, leads to a quantum state that does not ascribe a well-defined value to the outcome of the friend's observation, in apparent contradiction with the friend's perspective.

Original languageEnglish
Title of host publicationAOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019
EditorsArnan Mitchell, Halina Rubinsztein-Dunlop
PublisherSPIE
ISBN (Electronic)9781510631403
DOIs
Publication statusPublished - 2019 Jan 1
EventAOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019 - Melbourne, Australia
Duration: 2019 Dec 92019 Dec 12

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11200
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceAOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019
CountryAustralia
CityMelbourne
Period19-12-0919-12-12

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Bong, K. W., Utreras-Alarcón, A., Ghafari, F., Liang, Y. C., Tischler, N., Cavalcanti, E. G., Pryde, G. J., & Wiseman, H. M. (2019). Testing the reality of Wigner's friend's experience. In A. Mitchell, & H. Rubinsztein-Dunlop (Eds.), AOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019 [112001C] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11200). SPIE. https://doi.org/10.1117/12.2540002