![]() ![]() The Weird Superfluids You See Near Absolute Zero.But recently, scientists at the Massachusetts Institute of Technology (MIT) were finally able to capture this movement of pure heat by developing a new method of thermography (a.k.a. Although this phenomenon has been observed before, it’s never been imaged. Scientists call this behavior a material’s “second sound” (the first being ordinary sound via a density wave). Instead of spreading out as one would expect, these superfluid quantum gasses “slosh” heat side to side-it essentially propagates as a wave. But the world is full of rare, exotic materials that don’t exactly play by these thermal rules. Drop a burning coal into a pot of water, and that liquid will slowly rise in temperature before its heat eventually dissipates. ![]() In the world of average, everyday materials, heat tends to spread out from a localized source. Understanding this dynamic could help answer questions about high-temperature superconductors and neutron stars.For the first time, MIT scientists have successfully imaged how heat actually travels in a wave, known as a “second sound,” through this exotic fluid.But things are a little different in the world of superfluid quantum gas. Usually, when something gets warmed up, heat tends to spread outward before eventually dissipating. ![]()
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