Roton liquid theory

Journal Article · Wed Sep 01 00:00:00 EDT 1982 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00681852· OSTI ID:6715245

Bedell, K; Pines, D; Fomin, I

A mean field approach, analogous to the Landau theory of Fermi liquids, is developed and applied to the interacting roton liquid present in superfluid /sup 4/He at the temperatures below the lambda-point. We derive stability conditions for the parameters describing the effective roton-roton interaction and use one of these to place a bound on the variation with temperature of the roton energy. By fitting to experimental results on the specific heat and normal fluid density, we obtain the first two moments of the effective roton interaction.

• Research Organization: Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois
• OSTI ID: 6715245
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 48:5; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
EVEN-EVEN NUCLEI
FLUIDS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
NUCLEI
PHYSICAL PROPERTIES
QUANTUM FLUIDS
QUASI PARTICLES
ROTONS
SPECIFIC HEAT
STABILITY
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
ULTRALOW TEMPERATURE