According to Astrid Lambrecht(2002):"When one empties out a space of all matter and lowers the temperature to absolute zero, one produces in a Gedankenexperiment the quantum vacuum state.".
Despite their great promise, however, superconductors have limits, the primary one being that most superconduct at very low temperatures- indeed, near absolute zero(-273 ºC).
由此产生的结构,它看起来像一个微小的甜甜圈,是粘到敏感的硅悬臂,然后冷却到绝对零度以上0.4度。
The resulting structure, which looks like a microscopic donut, is glued onto the sensitive silicon cantilever and then cooled to 0.4 degrees above absolute zero.
In 1986, researchers uncovered ceramics that were superconductive at temperatures as high as 30 degrees above absolute zero, or minus 406 degrees Fahrenheit(minus 243 degrees Celsius).
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