Some mechanisms of "spontaneous" polarization of superfluid He-4

Details Some mechanisms of "spontaneous" polarization of superfluid He-4 Some mechanisms of "spontaneous" polarization of superfluid He-4

2009-03-26

arxiv.org/abs/0903.4538v4

J. Low Temp. Phys., v. 158, p. 854 (2010)

Physics

Condensed Matter

Other Condensed Matter

13 pages; the calculation is extended and refined; v4: reconstruction

Scientific paper

10.1007/s10909-009-0057-y

Previously, a quantum "tidal" mechanism of polarization of the atoms of He-II was proposed, according to which, as a result of interatomic interaction, each atom of He-II acquires small fluctuating dipole and multipole moments, oriented chaotically on the average. In this work, we show that, in the presence of a temperature or density gradient in He-II, the originally chaotically oriented tidal dipole moments of the atoms become partially ordered, which results in volume polarization of He-II. It is found that the gravitational field of the Earth induces electric induction U =10(-7)V in He-II (for vessel dimensions of the order of 10 cm). We study also the connection of polarization and acceleration, and discuss a possible nature of the electric signal dU = kdT/2e observed by A.S. Rybalko in experiments with second sound.

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