Porosity dependence of sound propagation in liquid-4He-filled aerogel
K Matsumoto, Y Matsuyama, DA Tayurskii… - Journal of Experimental …, 2004 - Springer
Longitudinal sound-wave propagation has been studied in an aerogel-liquid 4 He system for
various porosities of aerogel. The superfluid transition was identified as the absorption peak …
various porosities of aerogel. The superfluid transition was identified as the absorption peak …
Hydrodynamic equations and collective modes in a system comprising a porous medium and a He3–He4 superfluid mixture
SE Kekutia, ND Chkhaidze - Low Temperature Physics, 2006 - pubs.aip.org
The dynamical equations are obtained for a system comprising a porous material and a He
3–He 4 superfluid mixture. The elastic coefficients that appear in the equations are …
3–He 4 superfluid mixture. The elastic coefficients that appear in the equations are …
Collective modes in aerogels of different porosity filled with helium II
The velocities of fast and slow collective modes of superfluid He II in 90%, 94% and 98%
porosity aerogels were measured by means of low-frequency resonant technique using …
porosity aerogels were measured by means of low-frequency resonant technique using …
Equations of motions for superfluid 3He–4He solution filled porous media
SE Kekutia, ND Chkhaidze - Journal of Statistical Mechanics …, 2005 - iopscience.iop.org
A theory of the propagation of acoustic waves in a porous medium filled with superfluid 3 He–
4 He solution is developed. The elastic coefficients in the system of equations are expressed …
4 He solution is developed. The elastic coefficients in the system of equations are expressed …
The features of the collective modes in aerogels filled with superfluid helium
The velocity of fast and slow collective modes of 90, 94, and 98% porosity aerogels filled
with superfluid helium are measured by a low-frequency resonant technique at temperatures …
with superfluid helium are measured by a low-frequency resonant technique at temperatures …
Equations of motion and velocities of longitudinal waves for superfluid He‐A3 filled aerogel in the presence of finite magnetic field
SE Kekutia, ND Chkhaidze - Low Temperature Physics, 2008 - pubs.aip.org
The dynamical equations for superfluid He–A 3 filled aerogel in finite magnetic fields are
determined. The speeds of propagating longitudinal modes in the A 1 and A phases of this …
determined. The speeds of propagating longitudinal modes in the A 1 and A phases of this …
Acoustical Properties of Superfluid Helium in Confined Geometry
SE Kekutia, ND Chkhaidze - arxiv preprint cond-mat/0604193, 2006 - arxiv.org
The problem studied in this paper is to obtain the equations describing sound propagation in
a consolidated porous medium filled with superfluid, determine the elastic coefficients …
a consolidated porous medium filled with superfluid, determine the elastic coefficients …
Theory of Sound Propagation in Superfluid Solutions Filled Porous Media
SE Kekutia, ND Chkhaidze - arxiv preprint cond-mat/0502259, 2005 - arxiv.org
A theory of the propagation of acoustic waves in a porous medium filled with superfluid
solution is developed. The elastic coefficients in the system of equations are expressed in …
solution is developed. The elastic coefficients in the system of equations are expressed in …
Nonlinear wave interactions in porous media filled with a quantum fluid
NI Pushkina - Acoustical Physics, 2004 - Springer
The problem of the nonlinear interaction between the fourth sound and an acoustic wave
propagating in a porous medium filled with superfluid helium is solved. Based on the …
propagating in a porous medium filled with superfluid helium is solved. Based on the …