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Old Jun 27th 2019, 04:24 AM   #1
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A harmonic crystals

when a harmonic crystals occurs or rathar what does it mean this expression?
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Old Jun 27th 2019, 07:46 AM   #2
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Note that I am extrapolating from vague memories, and scattered references found via Google...
However my thoughts are:

Under certain (experimental) conditions the interactions of sound pressure waves can be made to behave in a very similar way to the interactions of atoms.

From what I can gather (amongst the other dross dragged up in my Google search) a harmonic crystal is an acoustic standing wave, which may be used to model an atomic crystal lattice.

The nodes of the standing wave represent the positions of atoms in the crystal being modelled.
Various disturbances can then be applied to this acoustic standing wave,
and the responses of the nodes can be matched to responses of atoms in a crystal lattice.
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