The central principle of superconductivity is that electrons form pairs. But can they also condense into foursomes? Recent findings have suggested they can, and a physicist at KTH Royal Institute of Technology, Sweden published the first experimental evidence of this quadrupling effect and the mechanism by which this state of matter occurs.<br /><br />Credit: Vadim Grinenko, Federico Caglieris<br /><br />Research Paper: State with spontaneously broken time-reversal symmetry above the superconducting phase transition <a href="https://www.nature.com/articles/s41567-021-01350-9" target="_blank" rel="nofollow">https://www.nature.com/articles/s41567-021-01350-9</a><br /><br />News Source: <a href="https://www.eurekalert.org/news-releases/931832" target="_blank" rel="nofollow">https://www.eurekalert.org/news-releases/931832</a><br />...<br /><a href="https://www.youtube.com/watch?v=Kc0c5wut8pg" target="_blank" rel="nofollow">https://www.youtube.com/watch?v=Kc0c5wut8pg</a>