Hybridization of localized and density modes for the roton spectrum of superfluid ${^4}$He
| dc.creator | Gov, N. | |
| dc.creator | Akkermans, E. | |
| dc.date | 1998-05-28 | |
| dc.date | 1998-12-07 | |
| dc.date.accessioned | 2026-07-07T03:10:41Z | |
| dc.date.available | 2026-07-07T03:10:41Z | |
| dc.description | A new description is presented for the roton part of the energy spectrum of supe rfluid ${^4}$He. It is based on the assumption that in addition to the Feynman density excitations, there exist localized modes which describe vortex-core elements. The energy spectrum which results from the hybridization of these two kinds of excitations is compared to the experimental data namely the structure factor and the scattering cross-section for the single quasiparticle excitation. Another type of excitation interpreted as a vortex loop is obtained whose energy agrees both with Raman scattering and critical velocity experiments. | |
| dc.description | 4 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9805372 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9805372 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/28305 | |
| dc.subject | Statistical Mechanics | |
| dc.subject | Superconductivity | |
| dc.title | Hybridization of localized and density modes for the roton spectrum of superfluid ${^4}$He | |
| dc.type | text |