An anonymous reader quotes a report from Popular Mechanics: For the first time, scientists have observed an interaction of a rare and baffling form of matter called time crystals. The crystals look at a glance like "regular" crystals, but they have a relationship to time that both intrigues and puzzles scientists because of its unpredictability. Now, experts say they could have applications in quantum computing. [...] Researchers say they've collided two time crystals to see what happens next. "Our results demonstrate that time crystals obey the general dynamics of quantum mechanics and offer a basis to further investigate the fundamental properties of these phases, opening pathways for possible applications in developing fields, such as quantum information processing," they explain in a new paper. In their experiments, they placed two time crystals in superfluid and mixed magnons between them. Magnons are a magnetic quasiparticle that, in this case, led to "opposite-phase oscillations," while the crystals themselves stayed phase stable. What's cool (and, literally, supercooled) is how the matter acts within predictable quantum mechanical ways despite the central quality of wild oscillation patterns over time. "Before this, nobody had observed two time crystals in the same system, let alone seen them interact," lead author Samuli Autti, of Lancaster University, said in a statement. "Controlled interactions are the number one item on the wish list of anyone looking to harness a time crystal for practical applications, such as quantum information processing."

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Michele Solis, writing for Scientific American: In a perfect world, we would learn from success and failure alike. Both hold instructive lessons and provide needed reality checks that may safeguard our decisions from bad information or biased advice. But, alas, our brain doesn't work this way. Unlike an impartial outcome-weighing machine an engineer might design, it learns more from some experiences than others. A few of these biases may already sound familiar: A positivity bias causes us to weigh rewards more heavily than punishments. And a confirmation bias makes us take to heart outcomes that confirm what we thought was true to begin with but discount those that show we were wrong. A new study, however, peels away these biases to find a role for choice at their core. A bias related to the choices we make explains all the others, says Stefano Palminteri of the French National Institute for Health and Medical Research (INSERM), who conducted a study published in Nature Human Behaviour in August that examines this tendency. "In a sense we have been perfecting our understanding of this bias," he says.

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