Test of the universality of free fall with atoms in different spin Orientations · HackerPapers discussionshttps://hackerpaper.kaipfister.de/p/1503.00433/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMTTest of the universality of free fall with atoms in different spin Orientations — mentioned by raattgifthttps://news.ycombinator.com/item?id=33488376urn:hackerpapers:mention:1503.00433:33488376Sun, 06 Nov 2022 02:55:44 GMT<p>Unfortunately, different quantum spin orientations don&#x27;t appear to evade the weak equivalence principle. Dropping Bose-Einstein condensates in vacuum drop towers is a popular experiment. An example, &quot;Tests of the Universality of Free Fall with Atoms in Different Spin Orientations&quot;, 2016, &lt;http://dx.doi.org/10.1103/PhysRevLett.117.023001&gt; which is the published version of &lt;https://arxiv.org/abs/1503.00433v1&gt;. Likewise, one would not expect a ferromagnet and a ferroic glass to fall differently in a drop tower. Quantum spin is relevant in post-Newtonian (GR-compatible) gravitation, though. Rough…</p><p><a href="https://hackerpaper.kaipfister.de/p/1503.00433/">Paper and discussion history</a>. A mention is not an endorsement.</p>physics.atom-ph