Coherent Collective Excitations in a Superfluid: Spontaneously Broken Symmetries and Fluctuations-Dissipation
| dc.creator | Han, S. J. | |
| dc.date | 2006-07-18 | |
| dc.date | 2009-03-29 | |
| dc.date.accessioned | 2026-07-07T12:57:19Z | |
| dc.date.available | 2026-07-07T12:57:19Z | |
| dc.description | This paper presents an elementary theory of the phase-coherent collective excitations in both He II in the gravitational field and atomic Bose-Einstein condensation in a trap. The theory is based on the concept of off-diagonal long-range order by Penrose and Onsager and the quantum theory of Bohm, with emphasis on the broken symmetry in a Bose-Einstein gas with repulsive interactions. It is shown that a spontaneously broken symmetry that accompanies a phonon (Nambu-Goldstone mode) takes place at the surface layer of an inhomogeneous Bose system in the presence of an external field. The spontaneously broken symmetry in a Bose system is described and is shown to manifest itself in both He II and the Bose-Einstein condensation - a shell-like structure of Bose-Einstein condensation in a trap. The broken symmetry gives a coherent explanation for a number of long standing puzzles in He II. | |
| dc.description | 84 pages, 1 figure, (1) The Bose-Einstein condensation is discussed in both a degenerate Bose gas and an imperfect Bose gas to show how the pair-interaction affects the nature of phase-transition, (2) The Onsager-Feynman quantization of circulation in He II is discussed with the identifiable cause with Planck's quantum condition | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0607433 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0607433 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/224889 | |
| dc.subject | Other Condensed Matter | |
| dc.title | Coherent Collective Excitations in a Superfluid: Spontaneously Broken Symmetries and Fluctuations-Dissipation | |
| dc.type | text |