Study of ultracold quantum dynamics using the controlled KRb inter-atomic interaction

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Ｗe studied the two-component dilute gas in a toroidal trap theoretically, thus predicting what phenomena would occur. Fixing the initial values of the angular momentum of each component of the dilute gas and varying the interaction strength, we found the occurrence of a nontrivial motion of the components caused by the exchange of angular momentum. At the same time, we advanced the construction of the toroidal trap. As for molecular formation rate, we applied SPSS and ChET methods to evaluate its temperature dependence. The molecular formation rate is strongly affected by the growth of the atomic BEC, pointing out the importance of experiments at temperatures below Tc.