4 ms·
>"Wouldn't it be super weird if you jiggled the Jell-O and found that somehow it responded at a different period?" Yao said. "But that is the essence of the tim
by DINKDINK 10y ago
>"Wouldn't it be super weird if you jiggled the Jell-O and found that somehow it responded at a different period?" Yao said. "But that is the essence of the time crystal. You have some periodic driver that has a period 'T', but the system somehow synchronizes so that you observe the system oscillating with a period that is larger than 'T'."
I don't have anywhere close the knowledge and background that these physicists have but no that wouldn't be very odd if you observed oscillations that were something other than T. In music, this is called a harmonic. If you push and pull on a garage door with a period of T or a frequency of 1/T the door will product oscillations at frequencies other than 1/T
- Groxx 10y agoHarmonics only increase the frequency though, right? Not decrease? You can't get an octave lower note from plucking a guitar string in a certain way.
- ithkuil 10y agoHarmonics (overtones) are already there. By definition the fundamental tone is just the lowest frequency. You can isolate harmonics either by amplifying the desired frequency or by muting a longer wave length e.g. by placing a finger on a string in a place that is a node of the higher frequency harmonics but not a node in the lower frequency. Thus by definition you cannot create subharmonics, well unless you cheat :-) http://www.marikimura.com/subharmonics.html http://www.marikimura.com/subharmonics.html
- DINKDINK 10y agoHarmonics are caused by the different modes that any entity vibrates at (physical, electrical, or magnetic). If you strike and object with an impulse a rich array of vibrations will occur (think of a gong, a snare, a garage door) all of those modes will be present if you repeatedly strike or oscillate the object.