标题： 在四极磁场所中对射频涂层原子的捕获和冷却 显示英文标题

标题： Trapping and cooling of rf-dressed atoms in a quadrupole magnetic field

摘要： 我们观察到被泡状射频修饰陷阱（Zobay和Garraway，2001）束缚的原子的自发蒸发。 原子被束缚在四极磁 trap 中，并被线性偏振的射频场修饰。 蒸发与陷阱中由于射频耦合消失的位置处的孔洞有关，这是由于其矢量特性。 最终温度是剩余加热与蒸发效率之间竞争的结果，这通过孔洞相对于陷阱底部的高度来控制。 实验数据由蒙特卡罗模拟建模，该模拟预测相空间密度的小幅增加受到加热率的限制。 这种增加在实验的相空间密度确定不确定范围内。 显示英文摘要

摘要： We observe the spontaneous evaporation of atoms confined in a bubble-like rf-dressed trap (Zobay and Garraway, 2001). The atoms are confined in a quadrupole magnetic trap and are dressed by a linearly polarized rf field. The evaporation is related to the presence of holes in the trap, at the positions where the rf coupling vanishes, due to its vectorial character. The final temperature results from a competition between residual heating and evaporation efficiency, which is controlled via the height of the holes with respect to the bottom of the trap. The experimental data are modeled by a Monte-Carlo simulation predicting a small increase in phase space density limited by the heating rate. This increase was within the phase space density determination uncertainty of the experiment.