(physics) A quantum of rotational motion in a liquid, such as superfluid helium.
Roton
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(′rō′tän)
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For other uses, see Roton (disambiguation).
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A roton is an elementary excitation, or quasiparticle, in superfluid Helium-4. The dispersion relation of elementary excitations in this superfluid shows a linear increase from the origin, but exhibits first a maximum and then a minimum in energy as the momentum increases. Excitations with momenta in the linear region are called phonons; those with momenta close to the minimum are called rotons. Excitations with momenta near the maximum are sometimes called maxons.
See also
References
Feynman, RP, Superfluidity and Superconductivity, Rev.Mod.Phys.29, 205 (1957)
External links
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 | Lev Davidovich Landau (Azerbaijani theoretical physicist) |
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