Roton Viscosity and Roton-Roton Interactions in Superfluid Helium

スポンサーリンク

概要

• 論文の詳細を見る

• Assuming a δ-function type interaction between rotons as was done by Landau and Khalat-nikov, we treat the roton-roton scattering exactly taking into account the scattering processes to infinite order. The roton viscosity coefficient η_γ is calculated with use of the exactly calculated roton-roton scattering cross section. The calculated roton viscosity shows a behavior different from that which Landau and Khalatnikov predicted employing the Born approximation, that is: (1) η_γ is temperature dependent; (2) η_γ has a lower bound three times as large as the experimental value of the roton viscosity. Therefore, the calculated η_γ cannot be matched with experiment for any value of the coupling constant. It is emphasized that the angular dependence of the roton-roton interaction should be taken into account to obtain agreement with experiment.

• 理論物理学刊行会の論文
• 1972-02-25

著者

• Hatano Akira

  Faculty Of Pure And Applied Science College Of General Education University Of Tokyo

• NAGAI Katsuhiko

  Institute of Physics, College of General Education University of Tokyo

• NOJIMA Koichiro

  Institute of Physics, College of General Education University of Tokyo

• Nojima Koichiro

  Institute Of Materials Science University Of Tsukuba

• Nojima Koichiro

  Institute Of Physics College Of General Education University Of Tokyo : Department Of Physics Tokyo

• Nagai Katsuhiko

  Institute Of Physics College Of General Education University Of Tokyo

• HATANO Akira

  Faculty of Pure and Applied Science, College of General Education University of Tokyo

関連論文

• Roton Viscosity and Roton-Roton Interactions in Superfluid Helium
• Ground-State Energy and Phonon Spectra of bcc Solid Helium
• Notes on the Ising Model
• Non-Linear Sigma Model in Semi-Infinite Geometry
• Surface Critical Phenomena in Nonlinear Sigma Model
• Reply to Ohno and Okabe's Comment
• The Statistical Dynamics of Turbulence
• The Stochastic Method in Fermion Many-Body Problem : Condensed Matter and Statistical Physics

スポンサーリンク