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The hottest and coldest temperatures in our universe are rarely witnessed, but in these rare spots, our understanding of physics is challenged. Weird things happen at extreme hot and absolute cold.
Clark, J. B., Lecocq, F., Simmonds, R. W., Aumentado, J., & Teufel, J. D. (2017). Sideband cooling beyond the quantum backaction limit with squeezed light. Nature, 541(7636), 191.
An Introduction to Modern Astrophysics, 2nd ed, Bradley W Carroll and Dale A Ostlie, 2006.
An Introduction to Thermal Physics, Daniel Schroeder, 1999.
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