Damping of second sound in superfluid helium by order-parameter relaxation

Journal Article · Fri Feb 01 04:00:00 EST 1985 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.31.1661· OSTI ID:6212459

Ferrell, R A; Bhattacharjee, J K

The local temperature oscillations that occur in both first and second sound require a corresponding variation in the local superfluid density, which takes place by order-parameter relaxation. Therefore, the corresponding contribution to the damping rate of both first and second sound is proportional to the order-parameter relaxation time. But in second sound, part of the required variation in superfluid density is produced instantaneously by convection, thereby greatly reducing the relaxational damping of second sound. The full unmodified effect of order-parameter relaxation only sets in asymptotically very close to the lambda point.

• Research Organization: Center for Theoretical Physics, Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742
• OSTI ID: 6212459
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 31:3; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

640450* -- Fluid Physics-- Superfluidity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DAMPING
EVEN-EVEN NUCLEI
FLUIDS
HELIUM 4
HELIUM II
HELIUM ISOTOPES
ISOTOPES
LANDAU LIQUID HELIUM THEORY
LIGHT NUCLEI
NUCLEI
ORDER PARAMETERS
QUANTUM FLUIDS
RELAXATION TIME
SECOND SOUND
STABLE ISOTOPES
SUPERFLUIDITY
THERMODYNAMICS