• Jai Carol Cruz

Articles written in Pramana – Journal of Physics

• Density excitations of a harmonically trapped ideal gas

The dynamic structure factor $S(\mathbf{q}, \omega)$ of a harmonically trapped Bose gas has been calculated well above the Bose–Einstein condensation temperature by treating the gas cloud as a canonical ensemble of non-interacting classical particles. The static structure factor is found to vanish $\varpropto q^{2}$ in the long-wavelength limit. We also incorporate a relaxation mechanism phenomenologically by including a stochastic friction force to study $S(\mathbf{q}, \omega).$ A significant temperature dependence of the density fluctuation spectra is found. The Debye–Waller factor has been calculated for the trapped thermal cloud as a function of q and the number $\mathcal{N}$ of atoms. A substantial difference is found for small- and large-$\mathcal{N}$ clouds.

• # Pramana – Journal of Physics

Volume 94, 2020
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019