Time-dependent condensation of bosonic potassium

Abstract

We calculate the time-dependent formation of Bose--Einstein condensates (BECs) in potassium vapours based on a previously derived exactly solvable nonlinear boson diffusion equation (NBDE). Thermalization following a sudden energy quench from an initial temperature $T_{\mathrm{i}}$ to a final temperature $T_{\mathrm{f}}$ below the critical value and BEC formation are accounted for using closed-form analytical solutions of the NBDE. The time-dependent condensate fraction is compared with available ${}^{39}$K data for various scattering lengths.

arXiv comment8 pages, 3 figures

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