超冷化学中的化学振荡
Chemical Oscillation in Ultracold Chemistry
摘要：
我们证明了原子-分子玻色-爱因斯坦凝聚体超冷化学中振荡反应的发生。平均场动力学中的非线性振荡在特定的椭圆模量范围内发生，从而引起原子分子布居密度的同相和异相调制。反应前沿速度被发现是由光缔合，这也调节冷凝物密度控制。两个不同的同相明亮的局域间隙孤子对被发现作为精确解，其中之一的存在必然需要一个背景。在平面波分子背景中，在吸引域和排斥域都观察到了椭圆余弦原子密度波。在光缔合的存在下，阐明了种内和种间相互作用对存在和稳定性的作用。
英文摘要：
We demonstrate the occurrence of oscillatory reactions in the ultra-cold chemistry of atom-molecular Bose-Einstein condensate. Nonlinear oscillations in the mean-field dynamics occur for a specific range of elliptic modulus, giving rise to both in- and out-phase modulations in the atom-molecule population density. The reaction front velocity is found to be controlled by photoassociation, which also regulates the condensate density. Two distinct pair of in-phase bright localized gap solitons are found as exact solutions, existence of one of which necessarily requires a background. Cnoidal atomic density-waves in a plane wave molecular background are observed in both attractive and repulsive domains. Role of intra- and inter-species interactions on both existence and stability is explicated in the presence of photoassociation.
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