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Updated: Jul 1, 2025

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
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浮遊 結晶 は 白い 矮星 の 冷却 を 止める

Antoine Bédard1, Simon Blouin2, Sihao Cheng3

  • 1Department of Physics, University of Warwick, Coventry, UK. antoine.bedard@warwick.ac.uk.

Nature
|March 6, 2024
PubMed
まとめ

凍った白矮星は 固体-液体の蒸留プロセスにより 数十億年もの間 輝きを維持できます この重力エネルギー放出は 恒星の異常な冷却の遅れを説明し "死んだ星"の概念に挑戦します

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Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...
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The physical form of a substance changes on changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. Vaporization occurs when the thermal motion of the molecules overcome the intermolecular forces, and the molecules (at the surface) escape into the gaseous state. When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase...
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