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#Phonons

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rexi<p><a href="https://phys.org/news/2018-08-phonons-mass-negative-gravity.html" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">phys.org/news/2018-08-phonons-</span><span class="invisible">mass-negative-gravity.html</span></a></p><p>[dying to know what the consensus ended up being on this radical theory (pub 23 Jul 2018). guess I'l do some hunting; tips appreciated]<br>trio of <a href="https://mastodon.social/tags/ColumbiaUni" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ColumbiaUni</span></a> physicists is making waves with a new theory about <a href="https://mastodon.social/tags/phonons" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>phonons</span></a>—they suggest they might have negative mass, and because of that, have negative gravity. Angelo Esposito, Rafael Krichevsky and Alberto Nicolis have written a paper to support their theory, including the math, and uploaded it to the xrXiv preprint server.</p>
Scientific Frontline<p><a href="https://mastodon.social/tags/Materials" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Materials</span></a> with enhanced <a href="https://mastodon.social/tags/thermal" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>thermal</span></a> <a href="https://mastodon.social/tags/conductivity" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>conductivity</span></a> are critical for the development of advanced devices to support applications in <a href="https://mastodon.social/tags/communications" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>communications</span></a>, clean energy and <a href="https://mastodon.social/tags/aerospace" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>aerospace</span></a>. But in order to <a href="https://mastodon.social/tags/engineer" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>engineer</span></a> materials with this property, scientists need to understand how <a href="https://mastodon.social/tags/phonons" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>phonons</span></a>, or <a href="https://mastodon.social/tags/quantum" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>quantum</span></a> units of the vibration of atoms, behave in a particular substance.<br><a href="https://mastodon.social/tags/Physics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Physics</span></a> <a href="https://mastodon.social/tags/QuantumScience" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>QuantumScience</span></a> <a href="https://mastodon.social/tags/MaterialScience" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MaterialScience</span></a> <a href="https://mastodon.social/tags/sflorg" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>sflorg</span></a><br><a href="https://www.sflorg.com/2023/12/phy12152301.html" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">sflorg.com/2023/12/phy12152301</span><span class="invisible">.html</span></a></p>
Soh Kam Yung<p>Cool.</p><p>"You can’t divide the indivisible, unless you use quantum mechanics. Physicists have now turned to quantum effects to split phonons, the smallest bits of sound, researchers report in the June 9 Science."</p><p><a href="https://www.sciencenews.org/article/quantum-mechanics-sound-split-phonon" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">sciencenews.org/article/quantu</span><span class="invisible">m-mechanics-sound-split-phonon</span></a></p><p><a href="https://mstdn.io/tags/QuantumMechanics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>QuantumMechanics</span></a> <a href="https://mstdn.io/tags/Sound" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Sound</span></a> <a href="https://mstdn.io/tags/Phonons" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Phonons</span></a> </p><p><span class="h-card"><a href="https://mathstodon.xyz/@johncarlosbaez" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>johncarlosbaez</span></a></span></p>
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