{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,28]],"date-time":"2025-05-28T12:49:44Z","timestamp":1748436584434},"reference-count":48,"publisher":"Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften","license":[{"start":{"date-parts":[[2022,8,24]],"date-time":"2022-08-24T00:00:00Z","timestamp":1661299200000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000925","name":"The John Templeton Foundation","doi-asserted-by":"crossref","award":["Q-CAUSAL\/61084"],"award-info":[{"award-number":["Q-CAUSAL\/61084"]}],"id":[{"id":"10.13039\/100000925","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/501100013275","name":"Serrapilheira Institute","doi-asserted-by":"crossref","award":["Serra-1708-15763"],"award-info":[{"award-number":["Serra-1708-15763"]}],"id":[{"id":"10.13039\/501100013275","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/100000893","name":"Simons Foundation","doi-asserted-by":"crossref","award":["884966, AF"],"award-info":[{"award-number":["884966, AF"]}],"id":[{"id":"10.13039\/100000893","id-type":"DOI","asserted-by":"crossref"}]},{"name":"Brazilian National Council for Scien- tific and Technological Development (CNPq) via the National Institute for Science and Technol- ogy on Quantum Information","award":["406574\/2018-9"],"award-info":[{"award-number":["406574\/2018-9"]}]},{"name":"Brazilian National Council for Scien- tific and Technological Development (CNPq) via the National Institute for Science and Technol- ogy on Quantum Information","award":["307295\/20206"],"award-info":[{"award-number":["307295\/20206"]}]},{"name":"Foundational Questions Insti- tute and Fetzer Franklin Fund","award":["FQXi-RFP- IPW-1905"],"award-info":[{"award-number":["FQXi-RFP- IPW-1905"]}]}],"content-domain":{"domain":["quantum-journal.org"],"crossmark-restriction":false},"short-container-title":["Quantum"],"abstract":"<jats:p>The notorious quantum measurement problem brings out the difficulty to reconcile two quantum postulates: the unitary evolution of closed quantum systems and the wave-function collapse after a measurement. This problematics is particularly highlighted in the Wigner&amp;apos;s friend thought experiment, where the mismatch between unitary evolution and measurement collapse leads to conflicting quantum descriptions for different observers. A recent no-go theorem has established that the (quantum) statistics arising from an extended Wigner&amp;apos;s friend scenario is incompatible when one try to hold together three innocuous assumptions, namely no-superdeterminism, parameter independence and absoluteness of observed events. Building on this extended scenario, we introduce two novel measures of non-absoluteness of events. The first is based on the EPR2 decomposition, and the second involves the relaxation of the absoluteness hypothesis assumed in the aforementioned no-go theorem. To prove that quantum correlations can be maximally non-absolute according to both quantifiers, we show that chained Bell inequalities (and relaxations thereof) are also valid constraints for Wigner&amp;apos;s experiment.<\/jats:p>","DOI":"10.22331\/q-2022-08-24-785","type":"journal-article","created":{"date-parts":[[2022,8,24]],"date-time":"2022-08-24T10:07:23Z","timestamp":1661335643000},"page":"785","update-policy":"http:\/\/dx.doi.org\/10.22331\/q-crossmark-policy-page","source":"Crossref","is-referenced-by-count":8,"title":["Events in quantum mechanics are maximally non-absolute"],"prefix":"10.22331","volume":"6","author":[{"given":"George","family":"Moreno","sequence":"first","affiliation":[{"name":"International Institute of Physics, Federal University of Rio Grande do Norte, 59078-970, Natal, Brazil"},{"name":"Departamento de Computa\u00e7\u00e3o, Universidade Federal Rural de Pernambuco, 52171-900, Recife, Pernambuco, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ranieri","family":"Nery","sequence":"additional","affiliation":[{"name":"International Institute of Physics, Federal University of Rio Grande do Norte, 59078-970, Natal, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cristhiano","family":"Duarte","sequence":"additional","affiliation":[{"name":"International Institute of Physics, Federal University of Rio Grande do Norte, 59078-970, Natal, Brazil"},{"name":"School of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rafael","family":"Chaves","sequence":"additional","affiliation":[{"name":"International Institute of Physics, Federal University of Rio Grande do Norte, 59078-970, Natal, Brazil"},{"name":"School of Science and Technology, Federal University of Rio Grande do Norte, Natal, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"9598","published-online":{"date-parts":[[2022,8,24]]},"reference":[{"key":"0","doi-asserted-by":"publisher","unstructured":"E. 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