Physics NotePublished
"q-Deformation and Energy Deficit in Liquid Helium Phonon Spectrum"
Lígia Maria Coelho de Souza Rodrigues; Stenio Wulck
1996
Publication details
- Authors
- Lígia Maria Coelho de Souza Rodrigues; Stenio Wulck
- Type
- Physics Note
- Status
- Published
- Publication date
- 1996
- Description
- The instability of the phonon spectrum in liquid Helium for <math>T<1\ K\,\!</math> is a well established experimental fact. We discuss the role of q-deformation as a possible mechanism to supply the energy deficit that forbiddens one-phonon decay into two phonons when the constant <math>\gamma\,\!</math> in the phonon anomalous dispersion relation <math>(\omega^{ph}=c_0p(1-\gamma p^2))\,\!</math> is positive, through the analysis of three-phonon processes in a q-phonons gas.
- Year
- 1996
- Number
- CBPF-NF-048/96
- Linked to a thesis
- No
- Linked to a grant
- No