Dynamical effects in superfluid helium 4 |
| |
Authors: | Mubarak Ahmad |
| |
Institution: | 1. Department of Physics, Kashmir University, Srinagar-6, India
|
| |
Abstract: | The close structural similarity between the commutation relations of harmonic oscillator operators and the operators for Bose fields is exploited to study the excitation spectrum in superfluid helium 4. By applying ‘broken symmetry’ condition it is shown how the creation of phonon gives rise to superfluid behaviour of liquid He 4. The energy gap needed for roton excitation is derived. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|