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jandan.net
2 年
制造出二维光子时间晶体 - 煎蛋
时间晶体是一种非平衡态的物质,能够在没有外界驱动的情况下,保持周期性的运动。这似乎违反了热力学第二定律,即孤立系统的熵只会增加,不会减少。但实际上,时间晶体并不是真正的孤立系统,它们需要一个周期性的激励来维持其运动状态。这个激励可以是电场、磁场或者光场等。 时间 ...
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