Superfluid Analog of the Davies-Unruh Effect
arXiv:gr-qc/0505005
Abstract
We produce an analog of the Davies-Unruh effect for superfluid helium four. There are two temperatures which result--one is associated with ordinary, or first, sound and the other with second sound.
The work presented here is unpublished, and not otherwise available. The original preprint is of some historic interest: it was one of the earliest articles in the modern, post-1990 revival of ``analog models'' for curved spacetime