双极转子超冷碰撞中的一维屏蔽理论
Adimensional theory of shielding in ultracold collisions of dipolar rotors
摘要：
我们研究了双极转子超冷碰撞的电场屏蔽，最初在他们的第一个旋转激发态，使用一维方法。我们建立了一个地图的好的和坏的候选人有效的蒸发冷却的屏蔽机制的基础上，通过提出的弹性淬火过程的比例作为一个重新缩放的旋转常数$\tilde{B} = B/s_{E_3}$和重新缩放的电场$\tilde{F} = dF/B$的函数。$B, d, F, s_{E_3}$分别是分子的转动常数、全电偶极矩、外加电场和特征偶极-偶极能量。我们确定了两组双碱偶极分子。第一组，包括RbCs，NaK，KCs，LiK，NaRb，LiRb，NaCs和LiCs，是有利的，在碰撞能量等于（或甚至更高）它们的特征偶极能量时比率超过1000。第二组，包括LiNa和KRb，是不利的。更一般地说，对于Hund的情况b很好地描述的分子，我们的一维研究提供了有效蒸发冷却的条件。适当的重新标度的旋转常数和重新标度的场的范围近似为$\tilde{B} \ge 10^8$和$3.25 \le \tilde{F} \le 3.8$，对于给定的$\tilde{B}$，对于$\tilde{F} \simeq 3.4$达到最大比率。我们还讨论了电子范德华相互作用对我们研究的一维特征的重要性。
英文摘要：
We investigate the electric field shielding of ultracold collisions of dipolar rotors, initially in their first rotational excited state, using an adimensional approach. We establish a map of good and bad candidates for efficient evaporative cooling based on this shielding mechanism, by presenting the ratio of elastic over quenching processes as a function of a rescaled rotational constant $\tilde{B} = B/s_{E_3}$ and a rescaled electric field $\tilde{F} = dF/B$. $B, d, F, s_{E_3}$ are respectively the rotational constant, the full electric dipole moment of the molecules, the applied electric field and a characteristic dipole-dipole energy. We identify two groups of bi-alkali dipolar molecules. The first group, including RbCs, NaK, KCs, LiK, NaRb, LiRb, NaCs and LiCs, is favorable with a ratio over 1000 at collision energies equal (or even higher) to their characteristic dipolar energy. The second group, including LiNa and KRb, is not favorable. More generally, for molecules well described by Hund's case b, our adimensional study provides the conditions of efficient evaporative cooling. The range of appropriate rescaled rotational constant and rescaled field is approximately $\tilde{B} \ge 10^8$ and $3.25 \le \tilde{F} \le 3.8$, with a maximum ratio reached for $\tilde{F} \simeq 3.4$ for a given $\tilde{B}$. We also discuss the importance of the electronic van der Waals interaction on the adimensional character of our study.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
