近日，大连理工大学的王高仁及其研究团队取得一项新进展。经过不懈努力，他们揭示超短激光脉冲中超冷弱束缚异核双原子分子的动力学。相关研究成果已于2024年3月18日在国际知名学术期刊《物理评论A》上发表。

该研究团队提出了一个用非共振单周期太赫兹激光脉冲动态，操纵超冷弱束缚异核碱金属双原子分子的理论模型。以⁶Li²³Na分子为例，研究人员首先计算了弱束缚态和准束缚态随外电场的变化，然后揭示了弱束缚态、散射态和准束缚态，在激光脉冲期间和之后的叠加所产生的丰富的干涉图样。此外，还可以通过测量波包动力学来绘制弱束缚分子的概率密度节点。

附： 英文原文

Title: Dynamics of an ultracold weakly bound heteronuclear diatomic molecule in an ultrashort laser pulse

Author: Zi-Ang Li, Xu-Hui Bai, Yi-De Yin, Gao-Ren Wang, Shu-Lin Cong

Issue&Volume: 2024/03/18

Abstract: We propose a theoretical model used for dynamically manipulating an ultracold weakly bound heteronuclear alkali-metal diatomic molecule by a nonresonant single-cycle THz laser pulse. Taking the ⁶Li²³Na molecule as an example, we first calculate the variation of the weakly bound state and quasibound state as a function of external electric field, and then reveal abundant interference patterns during and after the laser pulse due to the superpositions between states involving weakly bound state, scattering state, and quasibound state. Moreover, one can map out the nodes of the probability density of the weakly bound molecules by measuring the wavepacket dynamics.

DOI: 10.1103/PhysRevA.109.033311

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.109.033311