Juan (mcclintock) wrote,

Phonons - learn something new every day

Interesting story on slashdot: First Acoustic Black Hole Created

From article
"One of the many curious properties of Bose Einstein Condensates (BECs) is that the flow of sound through them is governed by the same equations that describe how light is bent by a gravitational field. Now, a group of Israeli physicists have exploited this idea to create an acoustic black hole in a BEC."

Apparently there are these things called Phonon's which are the sound equivalent of photons and have dual wave particle properties as well. I did not know that.

The Wikipedia entry on Phonos is beyone my layman's understanding, but apparently these 'particles' can be measured in crystals and they may be able to find some kind of 'sonic hawking radiation' in their mock sound black hole using them.

Here's the layman's explanation on the wikipedia

"Phonons are the tiniest particles of sound. Phonons are to sound as photons are to light. It takes billions of phonons to make up a sound. Phonons oscillate, echo, reverberate etc. at the sub atomic level in the quantum soup." -Pauline Oliveros

"Phonons are quantized modes of atomic vibration that propagate throughout the lattice of a solid."[3] -Jarrett Cohen, National Centre for Supercomputing Applications, University of Illinois

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