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Physicists have filmed the oscillation of a time crystal

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Re: Physicists have filmed the oscillation of a time crystal

#12
post #11
post #4

Far out! Here is the 13 second video from the Max Planck Society in all its glory: https://youtu.be/kUY3TglEUCU

Honestly, the video just looks like someone re-inverted an image several times over using a fade. What am I missing?

> Time crystals should be stable and coherent over long time periods, because they - theoretically - oscillate at their lowest possible energy state. The team's research shows that driven magnonic time crystals can be easily manipulated, opening a new way to reconfigure time crystals. This could open up the state of matter for a range of practical applications.

> "Classical crystals have a very broad field of applications," said physicist Joachim Gräfe of the Max Planck Institute for Intelligent Systems.

> "Now, if crystals can interact not only in space but also in time, we add another dimension of possible applications. The potential for communication, radar or imaging technology is huge."

Re: Physicists have filmed the oscillation of a time crystal

#13

How do Time Crystals differ from the quartz crystals used for time keeping in electronics? Is the only difference that Time Crystals oscillate without needing an electric field?

I also wonder how a time crystal is different from a harmonic oscillator.

Re: Physicists have filmed the oscillation of a time crystal

#19

How do Time Crystals differ from the quartz crystals used for time keeping in electronics? Is the only difference that Time Crystals oscillate without needing an electric field?

Normally, a system (like a quartz) which is driven by an external frequency, oscillates at the same or a multiple of the driving frequency. This is because the external conditions are symmetric under a time translation (i.e. a delay) by the period duration. This symmetry is normally preserved by the system.

A time crystal, however, will oscillate with a fraction (or rational multiple) of the driving frequency. This breaks the original time translation symmetry.

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