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1979•Physical Review LettersRequires access

Superfluid Two-Phase Sound

Seth Putterman, David Heckerman, Ralph Rosenbaum, Gary A. Williams

Open publisher page 15 citations

Abstract

The properties of the sound wave propagating in a superfluid two-phase system (liquid helium and its vapor) are investigated. At a frequency sufficiently low so that the superfluid helium and its vapor are in quasistatic equilibrium, there can propagate only one sound mode whose wave-guide-like velocity depends strongly on the vapor properties as well as the velocity of second sound. Near the $\ensuremath{\lambda}$ point, the mode probes the critical properties of the specific heat of the superfluid.

About this research paper

What this paper is about

The properties of the sound wave propagating in a superfluid two-phase system (liquid helium and its vapor) are investigated. At a frequency sufficiently low so that the superfluid helium and its vapor are in quasistatic equilibrium, there can propagate only one sound mode whose wave-guide-like velocity depends strongly on the vapor properties as well as the velocity of second sound. Near the $\ensuremath{\lambda}$ point, the mode probes the critical properties of the specific heat of the superfluid.

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OpenAlex reports 15 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

The properties of the sound wave propagating in a superfluid two-phase system (liquid helium and its vapor) are investigated. At a frequency sufficiently low so that the superfluid helium and its vapor are in quasistatic equilibrium, there can propagate only one sound mode whose wave-guide-like velocity depends strongly on the vapor properties as well as the velocity of second sound. Near the $\ensuremath{\lambda}$ point, the mode probes the critical properties of the specific heat of the superfluid.

Key concepts: Lambda point, Superfluidity, Second sound, Superfluid helium-4, Physics, Roton, Condensed matter physics, Helium-4

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