The Effective Interaction Between 3He Quasi-Particles on the Surface of Liquid 4He

  • D. O. Edwards
  • J. D. Feder
  • V. S. Nayak


Measurements of surface tension and of the velocity of surface sound1 have shown that less than a monolayer of 3He adsorbed on the surface of superfluid 4He behaves like a two-dimensional gas or 3He ‘quasiparticles’ with an effective mass M about 1.3 times the real mass m3. The interaction potential between the surface quasiparticles has been found to be quite weak. When interpreted in terms of an ‘effective interaction’ Vs(q), the analog of the BBP2 interaction V(q) between 3He dissolved in bulk 4He, the data give1
$$ {V^S}\left( {q = 0} \right) = + \left( {0.5 + 2.0} \right)\; \times \;{10^{ - 31}}erg\;c{m^2} $$
The sign and magnitude of Vs (q) are important because they determine whether the adsorbed 3He will become a two-dimensional BCS superfluid at a sufficiently low temperature. In this paper we use some naive theoretical arguments to augment our information about Vs(q) and the possibility of superfluidity.


Effective Interaction Schrodinger Equation Real Mass Bulk Helium Approximate Wavefunction 


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Copyright information

© Plenum Press, New York 1977

Authors and Affiliations

  • D. O. Edwards
    • 1
  • J. D. Feder
    • 1
  • V. S. Nayak
    • 1
  1. 1.The Ohio State UniversityColumbusUSA

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