{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T13:43:24Z","timestamp":1770817404539,"version":"3.50.1"},"reference-count":60,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2012,10,8]],"date-time":"2012-10-08T00:00:00Z","timestamp":1349654400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>After more than a century since its birth, Quantum Theory still eludes our understanding. If asked to describe it, we have to resort to abstract and ad hoc principles about complex Hilbert spaces. How is it possible that a fundamental physical theory cannot be described using the ordinary language of Physics? Here we offer a contribution to the problem from the angle of Quantum Information, providing a short non-technical presentation of a recent derivation of Quantum Theory from information-theoretic principles. The broad picture emerging from the principles is that Quantum Theory is the only standard theory of information that is compatible with the purity and reversibility of physical processes.<\/jats:p>","DOI":"10.3390\/e14101877","type":"journal-article","created":{"date-parts":[[2012,10,8]],"date-time":"2012-10-08T11:03:30Z","timestamp":1349694210000},"page":"1877-1893","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":36,"title":["Quantum Theory, Namely the Pure and Reversible Theory of Information"],"prefix":"10.3390","volume":"14","author":[{"given":"Giulio","family":"Chiribella","sequence":"first","affiliation":[{"name":"Center for Quantum Information, Institute for Interdisciplinary Information Sciences, Tsinghua University, Beijing 100084, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0602-5519","authenticated-orcid":false,"given":"Giacomo Mauro","family":"D\u2019Ariano","sequence":"additional","affiliation":[{"name":"QUIT Group, Dipartimento di Fisica, via Bassi 6, I-27100 Pavia, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paolo","family":"Perinotti","sequence":"additional","affiliation":[{"name":"QUIT Group, Dipartimento di Fisica, via Bassi 6, I-27100 Pavia, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2012,10,8]]},"reference":[{"key":"ref_1","unstructured":"Wheeler, J.A. \u2018A Practical Tool\u2019, but puzzling too. 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