Electric activity of vortices in superfluid He4

Abstract

The vortical motion of atoms in a quantum liquid is accompanied by their weak polarization under the action of centrifugal forces. Theoretical estimates of the effect give an electric field close to the axis of the vortex of about 300 V⋅cm−1 and a linear density of the bound charge in the core of about (3e)cm−1 (e is the charge of an electron).

On the effect of superfluid flows on the interaction of microwaves with He II

“…Moreover, they point out a special role, which the quasi-particles (i.e., phonons, rotons) should play in explaining these experiments. In [6][7][8][9][10][11][12], some attempts were made to theoretically explain these features. In the above works, a possible mechanism of microwave interaction with superfluid helium is proposed.…”

On the electric activity of superfluid systems

“…where L is the capillary length. The electric potential outside the fluid can be obtained by substituting (9) into (8). However, integration cannot be performed for arbitrary coordinates of the observation point x 0 and y 0 .…”

Two approaches to the description of dilute superfluid Bose systems

“…One possible way to describe microscopically the observed effects is the application of Zubarev's method to these systems (phenomenological approaches to the problem can be found in the theoretical studies Refs. [7][8][9][10][11][12][13][14][15][16]. For dilute Bose systems, for which a consistent microscopic theory can only be built, the main result can be obtained by replacing the field operators in the i-th excited state with C-numbers.…”