A Study of Elementary Excitations of Liquid Helium-4 Using Macro-orbital Microscopic Theory
| dc.creator | Jain, Yatendra S. | |
| dc.date | 2006-09-18 | |
| dc.date.accessioned | 2026-07-07T09:49:09Z | |
| dc.date.available | 2026-07-07T09:49:09Z | |
| dc.description | Energy of elementary excitations and the anomalous nature of small Q phonons in He-II are studied by using our macro-orbital microscopic theory of a system of interacting bosons (cond-mat/0606571). It is observed that : (i) the experimental E(Q) of He-II not only agrees with our theoretical relation $E(Q) = \hbar^2Q^2/4mS(Q)$ but also supports an important conclusion of Price that S(0) should have zero value for quantum fluids, and (ii) Feynman's energy of excitations $E(Q)_{Fyn} = \hbar^2Q^2/2mS(Q)$ equals approximately to $2E(Q)_{exp}$ even at low Q. Three problems with the Feynman's inference that $E(Q)_{Fyn}$ has good agreement with $E(Q)_{exp}$ at low Q are identified. It is argued that the theory can also be used to understand similar spectrum of the BEC state of a dilute gas reported by O'Dell et al. | |
| dc.description | 13 pages with 4 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0609418 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0609418 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/164480 | |
| dc.subject | Soft Condensed Matter | |
| dc.title | A Study of Elementary Excitations of Liquid Helium-4 Using Macro-orbital Microscopic Theory | |
| dc.type | text |