Wigner Friend scenarios with non-invasive weak measurements
Wigner Friend scenarios -- in which an external agent describes quantum mechanically a laboratory in which a Friend is making a measurement -- give rise to possible inconsistencies due to the ambiguous character of quantum measurements. In this work, we investigate Wigner Friend scenarios in which t...
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ftdatacite:10.48550/arxiv.2008.09003 2023-05-15T18:32:41+02:00 Wigner Friend scenarios with non-invasive weak measurements Matzkin, A. Sokolovski, D. 2020 https://dx.doi.org/10.48550/arxiv.2008.09003 https://arxiv.org/abs/2008.09003 unknown arXiv https://dx.doi.org/10.1103/physreva.102.062204 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Quantum Physics quant-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2020 ftdatacite https://doi.org/10.48550/arxiv.2008.09003 https://doi.org/10.1103/physreva.102.062204 2022-03-10T15:52:11Z Wigner Friend scenarios -- in which an external agent describes quantum mechanically a laboratory in which a Friend is making a measurement -- give rise to possible inconsistencies due to the ambiguous character of quantum measurements. In this work, we investigate Wigner Friend scenarios in which the external agents can probe in a non-invasive manner the dynamics inside the laboratories. We examine probes that can be very weakly coupled to the systems measured by the Friends, or to the pointers or environments inside the laboratories. These couplings, known as Weak Measurements, are asymptotically small and do not change the outcomes obtained by the Friends nor their probabilities. Within our scheme, we show that the weakly coupled probes indicate to the external agents how to obtain consistent predictions, irrespective of the possible inconsistencies of quantum measurement theory. These non-invasive couplings could be implemented with present-day technologies. : Slightly extended Discussion Section, as well as minor changes for improved readability. Similar to published version. To be published in PRA Article in Journal/Newspaper The Pointers DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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topic |
Quantum Physics quant-ph FOS Physical sciences |
spellingShingle |
Quantum Physics quant-ph FOS Physical sciences Matzkin, A. Sokolovski, D. Wigner Friend scenarios with non-invasive weak measurements |
topic_facet |
Quantum Physics quant-ph FOS Physical sciences |
description |
Wigner Friend scenarios -- in which an external agent describes quantum mechanically a laboratory in which a Friend is making a measurement -- give rise to possible inconsistencies due to the ambiguous character of quantum measurements. In this work, we investigate Wigner Friend scenarios in which the external agents can probe in a non-invasive manner the dynamics inside the laboratories. We examine probes that can be very weakly coupled to the systems measured by the Friends, or to the pointers or environments inside the laboratories. These couplings, known as Weak Measurements, are asymptotically small and do not change the outcomes obtained by the Friends nor their probabilities. Within our scheme, we show that the weakly coupled probes indicate to the external agents how to obtain consistent predictions, irrespective of the possible inconsistencies of quantum measurement theory. These non-invasive couplings could be implemented with present-day technologies. : Slightly extended Discussion Section, as well as minor changes for improved readability. Similar to published version. To be published in PRA |
format |
Article in Journal/Newspaper |
author |
Matzkin, A. Sokolovski, D. |
author_facet |
Matzkin, A. Sokolovski, D. |
author_sort |
Matzkin, A. |
title |
Wigner Friend scenarios with non-invasive weak measurements |
title_short |
Wigner Friend scenarios with non-invasive weak measurements |
title_full |
Wigner Friend scenarios with non-invasive weak measurements |
title_fullStr |
Wigner Friend scenarios with non-invasive weak measurements |
title_full_unstemmed |
Wigner Friend scenarios with non-invasive weak measurements |
title_sort |
wigner friend scenarios with non-invasive weak measurements |
publisher |
arXiv |
publishDate |
2020 |
url |
https://dx.doi.org/10.48550/arxiv.2008.09003 https://arxiv.org/abs/2008.09003 |
genre |
The Pointers |
genre_facet |
The Pointers |
op_relation |
https://dx.doi.org/10.1103/physreva.102.062204 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.2008.09003 https://doi.org/10.1103/physreva.102.062204 |
_version_ |
1766216872402878464 |