长程(n+2)D5/2nFJ里德堡分子的光谱特性研究

    Spectroscopy of Cs (n+2)D5/2nFJ long-range Rydberg macrodimers

    • 摘要: 里德堡原子间静电多极相互作用束缚形成长程里德堡分子。文章通过双里德堡原子间电多极相互作用的哈密顿量,数值计算不同主量子数n(n = 37~48)的铯(n+2)D5/2nFJ态里德堡分子绝热势能曲线,由(n+2)D5/2nF5/2相互作用吸引势与由(n+2)D5/2nF7/2相互作用排斥势相遇发生能级的交叉与避免交叉耦合,形成分子束缚势阱,束缚里德堡原子形成分子。研究里德堡原子间高阶相互作用对里德堡分子势能曲线的影响,优化分子势能曲线计算过程中的双里德堡原子对基矢量大小,获得不同总磁量子数M的里德堡分子束缚能 V_\min 和束缚键长R_\texteq值,研究其与主量子数n的依赖关系,为实验制备(n+2)D5/2nFJ态里德堡分子提供理论基础。

       

      Abstract: The formation of long-range Rydberg macrodimers is attributed to electrostatic multipole interactions. We calculate the adiabatic potentials of cesium (n+2)D5/2nFJ state Rydberg macrodimers with different principal quantum numbers n (n = 37~48) using the multipole interaction Hamiltonian. The adiabatic potential is formed by the avoided crossing coupling of the attractive potential from the interaction between (n+2)D5/2 and nF5/2 states and the repulsive potential from the interaction between (n+2)D5/2 and nF7/2 states, exhibiting a binding potential well, which should give rise to Rydberg macrodimer states. We Investigate the relationship between the adiabatic potentials on the maximal order of the multipole terms included in the calculation, and explore the impact of the two-body basis set size on the calculated adiabatic potentials. We determine the binding energies, V_\min , and lengths, R_\texteq, of the binding adiabatic potentials with the projection of sum of the electronic angular moment M, investigate their scaling behaviors as a function of the effective principal quantum number n.