https://hackerpaper.kaipfister.de/p/0912.5394/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=25202742urn:hackerpapers:mention:0912.5394:25202742Tue, 24 Nov 2020 20:35:27 GMT<p>The following papers make the argument that, at least for systems with a low initial entropy, &quot;within a quantum mechanical framework, all phenomena which leave a trail of information behind (and hence can be studied by physics) are those where entropy necessarily increases or remains constant. All phenomena where the entropy decreases must not leave any information of their having happened. This situation is completely indistinguishable from their not having happened at all.&quot; ---- Quantum Solution to the Arrow-of-Time Dilemma Lorenzo Maccone Phys. Rev. Lett. 103, 080401 – Published 17 August…</p><p><a href="https://hackerpaper.kaipfister.de/p/0912.5394/">Paper and discussion history</a>. A mention is not an endorsement.</p>quant-ph