Journal of Low Temperature Physics

, Volume 89, Issue 3–4, pp 429–432

Depression of the superfluid transition in4He

  • R. Haussmann
  • V. Dohm
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Abstract

We study superfluid4He near Tλ in a homogeneous metastable state where a finite superfluid velocity vs is present. Neglecting vortices we perform a renormalization-group calculation of the critical velocity vsc(T) at which the superfluid state becomes unstable. We apply this result to the situation where the superfluid velocity is induced by a finite heat current Q. A critical heat current Qc(T) corresponding to vsc(T) is found which implies a transition temperature Tλ (Q)=Tλ[1−AoQx]. We determine the exact exponent x=[(d−1)v]−1 ≈0.744 in d=3 dimensions and calculate Ao in one-loop order. Our results for Ao and x are compared with recent experimental data.

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Copyright information

© Plenum Publishing Corporation 1992

Authors and Affiliations

  • R. Haussmann
    • 1
  • V. Dohm
    • 1
  1. 1.Institut für Theoretische PhysikTechnische Hochschule AachenAachenGermany

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