Breaking Lorentz reciprocity with frequency conversion and delay · HackerPapers discussionshttps://hackerpaper.kaipfister.de/p/1705.09548/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMTBreaking Lorentz reciprocity with frequency conversion and delay — mentioned by rrmmhttps://news.ycombinator.com/item?id=14615200urn:hackerpapers:mention:1705.09548:14615200Thu, 22 Jun 2017 20:43:13 GMT<p>There are lots of systems that break the reciprocity: https://arxiv.org/pdf/1705.09548.pdf from a few months ago has some descriptions. I think (not having read the Science paper) the issue would be that the underlying fundamental physics has reciprocity as a basic feature by way of Hermitian operators.</p><p><a href="https://hackerpaper.kaipfister.de/p/1705.09548/">Paper and discussion history</a>. A mention is not an endorsement.</p>physics.class-ph