Physics NotePublished
-Dimensional Ideal Quantum q-Gas: Bose-Einstein Condensation and -Point Transition
M.R-Monteiro; I. Roditi; Lígia Maria Coelho de Souza Rodrigues
1994
Publication details
- Authors
- M.R-Monteiro; I. Roditi; Lígia Maria Coelho de Souza Rodrigues
- Type
- Physics Note
- Status
- Published
- Publication date
- 1994
- Description
- We consider an ideal quantum q-gas in <math>\nu\,\!</math> spatial dimensions and energy spectrum <math>\omega_i\ \alpha \ p^{\alpha}\,\!</math>. Departing from the Hamiltonian <math>H=\omega [N]\,\!</math>, we study the effect of the deformation on thermodynamic functions and equation of state of that system. The virial expansion is obtained for the high temperature (or low density) regime. The critical temperature is higher than in non-deformed ideal gases. We show that Bose-Einstein condensation always exists <math>(unless\,\!</math> <math>when\,\!</math> <math> \nu / \alpha = 1) \,\!</math> for finite q but not for <math>q=\infty\,\!</math>. Employing numerical calculations and selecting for <math>\nu /\alpha\,\!</math> the values <math>3/2, 2\,\!</math> and <math>3\,\!</math>, we show the critical temperature as a function of <math>q\,\!</math>, the specific heat <math>C_V\,\!</math> and the chemical potential <math>\mu\,\!</math> as functions of <math>T/T_c^q\,\!</math> for <math>q=1.05\,\!</math> and <math>q=4.5\,\!</math>. <math>C_V\,\!</math> exhibits a <math>\lambda\,\!</math>-point discontinuity in all cases,instead of the cusp singularity found in the usual ideal gas. Our results indicate that physical systems which have quantum symmetries can exhibit Bose-Einstein condensation phenomenon, the critical temperature being favoured by the deformation parameter.
- Year
- 1994
- Number
- CBPF-NF-020/94
- Linked to a thesis
- No
- Linked to a grant
- No