Annotation
An analysis is made of the effect of the phonon-phonon interaction at T = 0°K on the intrinsic energy of the phonon in the cubic approximation. The renormalized spectrum of ("dressed") phonons is found to be stable, as Landau and Khalatnikov concluded from a calculation of the viscosity of liquid helium.
© 2016 Publisher M.V.Lomonosov Moscow State University
Authors
V.A. Zagrebnov
Department of Theoretical Physics
Department of Theoretical Physics
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