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Abstracts
P3.32
Cavitation bubbles in liquid
4
He close to the
λ
-transition
Duda Daniel, ˇSvanˇcara Patrik, La Mantia Marco, Rotter Miloˇs, Schmoranzer
David, Skrbek Ladislav
Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16
Prague, Czech Republic
We report direct optical observation of cavitation bubbles in liquid helium,
both in classical viscous He I and in superfluid He II close to the
λ
-transition.
Heterogenous cavitation occurs due to the fast flowing liquid past the oscillating
body – a quartz tuning fork of resonant frequency of 4 kHz. A cluster of small
bubbles is observed and it changes rapidly size and position with time. At first
look, there is no difference between He I and He II, but a few differences were
observed: i) achieving cavitation is easier in He I; ii) the bubbles can last longer
than one camera frame in He I. We acknowledge the support of Charles University
Grant Agency under grant GAUK 1968214.
P3.33
Emergence of Non-Axisymmetric Vortex in Chiral P-Wave
Superconductor
Kurosawa Noriyuki, Kato Yusuke
The University of Tokyo, Graduate School of Arts and Sciences, Department of
Basic Science, Komaba 3-8-1, Meguro Tokyo 153-8902, Japan
We study strong-coupling effect upon an isolated vortex in the two-dimensional
chiral p-wave superconductor. We solved the Eilenberger equation for the
quasiclassical Green’s functions and the ´Eliashberg equation with single mode
Einstein boson self-consistently. We calculate the free-energy of the obtained
vortices, and found that there is a non-axisymmetric vortex, which is possibly
more stable than the axisymmetric circular vortex.
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