[time-nuts] Yale physicists find signs of a time crystal

Brooke Clarke brooke at pacific.net
Thu May 3 15:09:29 EDT 2018


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 
atomic ions.

Have Fun,

Brooke Clarke

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