Explosion of electron bubbles attached to quantized vortices in liquid 4He.
Electron bubbles in superfluid (4)He have been recently observed in low-temperature cavitation measurements under experimental conditions where quantized vortices are also present in the liquid, and which might be attached to the bubbles. We have calculated, within density functional theory, the structure and energetics of electron bubbles pinned to linear vortices in liquid (4)He at low temperature, and the pressure at which such structures become mechanically unstable. Our results are in semiquantitative agreement with the experiments. We discuss dynamical effects not included in the theoretical model used in the present calculations, and which could explain some discrepancies between our results and the experimental data.
Pi
Martí
M
Departament ECM, Facultat de Física, Diagonal 647, 08028 Barcelona, Spain.
Mayol
Ricardo
R
Hernando
Alberto
A
Barranco
Manuel
M
Ancilotto
Francesco
F