2018-05-03 19:09:29 UTC
The actual Yale papers are behind a paywall.
"Time crystals, first identified in 2016, are different. Their atoms spin periodically, first in one direction and then
in another, as a pulsating force is used to flip them. That’s the “ticking.” In addition, the ticking in a time crystal
is locked at a particular frequency, even when the pulse flips are imperfect."
But here is some public stuff:
Observation of a Discrete Time Crystal
"However, nonequilibrium Floquet systems subject to a periodic drive can exhibit persistent time-correlations at an
emergent sub-harmonic frequency7–10. This new phase of matter has been dubbed a “discrete time crystal” (DTC)10,11.
Here, we present the first experimental observation of a discrete time crystal, in an interacting spin chain of trapped
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