Comments by "Kevin Street" (@Kevin_Street) on "Impossible Time Crystal Breakthrough - Explained" video.

I think it's impossible for anything to change without some change in the energy of the system. That's why he said time crystals get close to (but are not) perpetual motion machines. The oscillation is powered by the laser, but when the input is constant it shows that the oscillation isn't caused by the laser. It's an inherent property of the crystal itself, using some of the beam energy to oscillate in time. Reducing the temperature is setting the stage for the experiment. It happens before the experiment begins and so long as that temperature is held constant, isn't a factor in what's occurring.
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