Dynamics of ultracold molecules in confined geometry and electric field
Dynamics of ultracold molecules in confined geometry and electric field
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受限几何和电场中超冷分子的动力学
DOI：
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发表时间：
2010
期刊：
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通讯作者：
J. Bohn
中科院分区：
文献类型：
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作者：
G. Qu'em'ener;J. Bohn
我们提出了一个与时间无关的量子形式来描述具有永久电偶极矩的分子在二维受限几何（如一维光学晶格）中在电场存在下的动力学。玻色与费米统计和选择规则在动力学中起着至关重要的作用。作为例子，我们比较了约束费米子和玻色子极性KRb分子在不同约束和电场下的动力学。我们展示了化学反应是如何被抑制的，或者通过“统计抑制”（适用于小电场和束缚下的费米子），或者通过“势能抑制”（适用于高电场和束缚下的费米子和玻色子）。我们还探索了将分子从一个限制势态转移到另一个限制势态的碰撞。虽然这些碰撞可能很重要，但我们表明它们在气体中分子总数的损失中不起作用。
We present a time-independent quantum formalism to describe the dynamics of molecules with permanent electric dipole moments in a two-dimensional confined geometry such as a one-dimensional optical lattice, in the presence of an electric field. Bose versus Fermi statistics and selection rules play a crucial role in the dynamics. As examples, we compare the dynamics of confined fermionic and bosonic polar KRb molecules under different confinements and electric fields. We show how chemical reactions can be suppressed, either by a 'statistical suppression' which applies for fermions at small electric fields and confinements, or by a 'potential energy suppression', which applies for both fermions and bosons at high electric fields and confinements. We also explore collisions that transfer molecules from one state of the confining potential to another. Although these collisions can be significant, we show that they do not play a role in the loss of the total number of molecules in the gas.