Sounds in One-Dimensional Superfluid Helium

The temperature variations of first-, second- and third-sound velocity and attenuation coefficients in one-dimensional superfluid helium are evaluated explicitly for very low temperatures and frequencies (omega s tau 1, where omega s is the sound frequency and tau the characteristic time), by using...

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Bibliographic Details
Main Authors: Um, C I, Kahng, W H, Whang, M H, Hong, S K, Oh, H G
Format: Report
Language:English
Subjects:
ATTENUATION
COEFFICIENTS
DISSIPATION
ENERGY
EQUATIONS
FREQUENCY
HELIUM
HYDRODYNAMICS
Inorganic Chemistry
LOW TEMPERATURE
ONE DIMENSIONAL
Physical Chemistry
RATIOS
SOUND
SUPERFLUIDITY
TEMPERATURE
VARIATIONS
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Summary:The temperature variations of first-, second- and third-sound velocity and attenuation coefficients in one-dimensional superfluid helium are evaluated explicitly for very low temperatures and frequencies (omega s tau 1, where omega s is the sound frequency and tau the characteristic time), by using the collisionless kinetic equation and superfluid hydrodynamic equations with the energy dissipation effect. The leading terms for these sounds vary as T2, and the ratio of second-sound to first-sound becomes unity as the temperature decreases to absolute zero. Superfluid helium, One dimensional, Sounds, Temperature variations, Hydrodynamics, Theory.