Chemical oscillation in ultracold chemistry

IF 1.8 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

EPL Pub Date : 2024-02-02 DOI:10.1209/0295-5075/ad259e

Subhrajit Modak, Priyam Das, Challenger Mishra, Prasanta K. Panigrahi

引用次数: 0

Abstract 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 along with a plane wave molecular motion 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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超冷化学中的化学振荡

摘要我们证明了在原子-分子玻色-爱因斯坦凝聚态的超冷化学中发生的振荡反应。在椭圆模量的特定范围内，均场动力学发生非线性振荡，引起原子-分子种群密度的相内和相外调制。研究发现，反应前沿速度受光结合控制，而光结合也会调节凝聚态密度。发现了两对不同的同相明亮局部间隙孤子的精确解，其中一个孤子的存在必然需要背景。在吸引域和排斥域都观察到了环状原子密度波和平面波分子运动。在存在光关联的情况下，解释了种内和种间相互作用对存在和稳定性的作用；

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来源期刊

EPL 物理-物理：综合

CiteScore

3.30

自引率

5.60%

发文量

332

审稿时长

1.9 months

期刊介绍： General physics – physics of elementary particles and fields – nuclear physics – atomic, molecular and optical physics – classical areas of phenomenology – physics of gases, plasmas and electrical discharges – condensed matter – cross-disciplinary physics and related areas of science and technology. Letters submitted to EPL should contain new results, ideas, concepts, experimental methods, theoretical treatments, including those with application potential and be of broad interest and importance to one or several sections of the physics community. The presentation should satisfy the specialist, yet remain understandable to the researchers in other fields through a suitable, clearly written introduction and conclusion (if appropriate). EPL also publishes Comments on Letters previously published in the Journal.