https://hackerpaper.kaipfister.de/p/hep-th_0405231/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMThttps://news.ycombinator.com/item?id=48420744urn:hackerpapers:mention:hep-th_0405231:48420744Sat, 06 Jun 2026 02:15:24 GMT<p>Not a physicist, but I think this paper used holographic principles to predict the minimum ratio of shear viscosity to volume density of entropy in fluids https://arxiv.org/pdf/hep-th/0405231</p><p><a href="https://hackerpaper.kaipfister.de/p/hep-th_0405231/">Paper and discussion history</a>. A mention is not an endorsement.</p>hep-thhttps://news.ycombinator.com/item?id=24743742urn:hackerpapers:mention:hep-th_0405231:24743742Sun, 11 Oct 2020 04:33:28 GMT<p>Here&#x27;s the arxiv link, for those who want to read the original article paywall-free: https://arxiv.org/abs/2004.04818. To be clear, this isn&#x27;t an unconditional speed limit. It appears to be something like &quot;the maximum speed of sound in matter which consists of atoms&quot; (maybe I&#x27;ve missed a few conditions). In particular, this speed limit is known to be violated inside of neutron stars (where the speed of sound is near 1/sqrt(3) times the speed of light, and may even exceed that). The paper also mentions a proposed lower bound on viscosity. This is the KSS bound…</p><p><a href="https://hackerpaper.kaipfister.de/p/hep-th_0405231/">Paper and discussion history</a>. A mention is not an endorsement.</p>hep-th