Collective Excitations in Superfluid Helium
- 19 February 1973
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 30 (8) , 312-315
- https://doi.org/10.1103/physrevlett.30.312
Abstract
Collective excitations of the phonon gas in liquid helium-4 are considered. It is proposed that below 0.5°K there are other propagating collective excitations in addition to second sound.Keywords
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