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formulation, namely the theoretical, the experimental, and the ontological ones. These features correspond to the three parts of the paper. In any empirical science, the first two features are obviously connected but, as is well known, among the different formulations and interpretations of non-relativistic quantum mechanics, only collapse models, as the paper well illustrates with a richness of details, have experimental consequences. Finally, we show that a clarification of the ontological intimations of collapse models is needed for at least three reasons: (1) to respond to the indispensable task of answering the question \u2019what are collapse models (and in general any physical theory) about?\u2019; (2) to achieve a deeper understanding of their different formulations; (3) to enlarge the panorama of possible readings of a theory, which historically has often played a fundamental heuristic role.<\/jats:p>","DOI":"10.3390\/e25040645","type":"journal-article","created":{"date-parts":[[2023,4,13]],"date-time":"2023-04-13T02:29:15Z","timestamp":1681352955000},"page":"645","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":29,"title":["Collapse Models: A Theoretical, Experimental and Philosophical Review"],"prefix":"10.3390","volume":"25","author":[{"given":"Angelo","family":"Bassi","sequence":"first","affiliation":[{"name":"Department of Physics, University of Trieste, Strada Costiera 11, 34151 Trieste, Italy"},{"name":"Istituto Nazionale di Fisica Nucleare, Trieste Section, Via Valerio 2, 34127 Trieste, Italy"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8313-6362","authenticated-orcid":false,"given":"Mauro","family":"Dorato","sequence":"additional","affiliation":[{"name":"Department of Philosophy, Communication and Media Studies, Universit\u00e0 degli Studi Roma Tre, Via Ostiense 234, 00146 Rome, Italy"}]},{"given":"Hendrik","family":"Ulbricht","sequence":"additional","affiliation":[{"name":"School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, UK"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,12]]},"reference":[{"key":"ref_1","unstructured":"Herzt, H. 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