Given that one of the basic properties of time crystals is that they move without any energy being applied, does that not mean that it's producing more energy than it's receiving? How does that not violate the first law of thermodynamics? Energy can't be created! So obviously I'm missing something: where is this movement coming from, and how does it not contradict everything we know and love about physics?

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    $\begingroup$ A planet moves in a periodic orbit and energy is not created. Plus in the experiment "to keep the ions out of equilibrium, the researchers alternately hit them with one laser to create an effective magnetic field and a second laser to partially flip the spins of the atoms" $\endgroup$
    – user126422
    Jan 29, 2017 at 20:17
  • $\begingroup$ @Albert But something had to put the energy into the planets for them to begin moving, and there's just nothing to stop them. Your second point is a valid one, though. $\endgroup$
    – DonielF
    Jan 29, 2017 at 20:43
  • $\begingroup$ It does not matter how you made or if there is nothing to stop it. The point is that an isolated system can be oscillating forever without consuming any energy. Internal motion does not violate the first law. $\endgroup$
    – user126422
    Jan 29, 2017 at 20:54
  • $\begingroup$ @Albert I didn't mean that it continued moving. My point was that, unlike the time crystals, planets had initial energy to push them. But I had forgotten about the lasers, which means that the crystals do also. $\endgroup$
    – DonielF
    Jan 29, 2017 at 22:12
  • $\begingroup$ Ok , I got it! . $\endgroup$
    – user126422
    Jan 30, 2017 at 0:24


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