论文标题
量子退化气体中的多体化学反应
Many-body Chemical Reactions in a Quantum Degenerate Gas
论文作者
论文摘要
通过混合Matterwave场来描述量子退化状态中的化学反应。量子相干性和骨骼增强是涉及玻色剂反应物和产物的多体反应的两个独特特征。这种化学物质的集体反应被称为“超级化学”，是量子化学研究中难以捉摸的目标。在这里，我们报告了在Feshbach共振附近凝结原子和分子之间的相干和集体反应性耦合的观察。从原子冷凝物开始，反应从分子的快速形成开始，然后在平衡过程中振荡其种群的振荡。在较高密度的样品中观察到更快的振荡，表明骨增强。我们提出了一个量子场模型，该模型很好地描述了动力学，并将三体重组鉴定为主要反应过程。我们的发现体现了高度渴望的量子多体化学，并为控制量子化学反应的控制提供了新的范式。
Chemical reactions in the quantum degenerate regime are described by mixing of matterwave fields. Quantum coherence and bosonic enhancement are two unique features of many-body reactions involving bosonic reactants and products. Such collective reactions of chemicals, dubbed "super-chemistry", is an elusive goal in quantum chemistry research. Here we report the observation of coherent and collective reactive coupling between Bose condensed atoms and molecules near a Feshbach resonance. Starting from an atomic condensate, the reaction begins with a rapid formation of molecules, followed by oscillations of their populations in the equilibration process. Faster oscillations are observed in samples with higher densities, indicating bosonic enhancement. We present a quantum field model which describes the dynamics well and identifies three-body recombination as the dominant reaction process. Our findings exemplify the highly sought-after quantum many-body chemistry and offer a new paradigm for the control of quantum chemical reactions.
