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<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Cooling neutron star in the Cassiopeia~A supernova remnant: Evidence for superfluidity in the core · HackerPapers discussions</title><link>https://hackerpaper.kaipfister.de/p/1012.0045/</link><description>Collected HN comments and submissions linking this paper.</description><language>en</language><lastBuildDate>Mon, 02 Nov 2026 11:16:22 GMT</lastBuildDate><atom:link href="https://hackerpaper.kaipfister.de/p/1012.0045/feed.xml" rel="self" type="application/rss+xml" /><item><title>Cooling neutron star in the Cassiopeia~A supernova remnant: Evidence for superfluidity in the core — mentioned by biswaroop</title><link>https://news.ycombinator.com/item?id=10360536</link><guid isPermaLink="false">urn:hackerpapers:mention:1012.0045:10360536</guid><pubDate>Fri, 09 Oct 2015 15:11:46 GMT</pubDate><description>&lt;p&gt;Superfluidity is briefly mentioned in the article, but it&amp;#x27;s a quantum effect that&amp;#x27;s visible in very large systems. A system exhibits zero viscosity when its particles condense into a single quantum mechanical state. Superconductivity is an instance of this, where electrons pair up and flow without resistance. Buckets of liquid helium show superfluidity. [1] Labs cool blobs of alkali gas to superfluidity. [2] Entire cores of neutron stars are superfluid. [3] There&amp;#x27;s even a theory of quantum gravity where physical vacuum is a superfluid. [4] [1] https://www.youtube.com/watch?v=2Z6UJbwxBZI [2]…&lt;/p&gt;&lt;p&gt;&lt;a href="https://hackerpaper.kaipfister.de/p/1012.0045/"&gt;Paper and discussion history&lt;/a&gt;. A mention is not an endorsement.&lt;/p&gt;</description><category>astro-ph.SR</category></item></channel></rss>
