Re:Physicists have filmed the oscillation of a time crystal
by centimeter on Tuesday March 02, 2021 @05:40PM
(#26322117)
How does this compare to the behavior of nonlinear optical crystals like lithium triborate? They are also pumped at a lower frequency (e.g. 1064nm photons) but lase at twice that (532nm).
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Re:Physicists have filmed the oscillation of a time crystal
by yccs27 on Tuesday March 02, 2021 @05:45PM
(#26322171)
In some way, it's the inverse: a nonlinear optical system can multiply frequencies, while a time crystal divides a frequency. That's not as easy as multiplying, due to the symmetry concerns I mentioned.
It's basically a frequency divider, but as a system of cold atoms instead of an electronic circuit, and in a different frequency regime.