Time delay of slow electrons by a diatomic molecule described by non-overlapping atomic potentials model

高激发态双原子振转光谱和慢原子碰撞的特性

Characteristics of highly excited diatomic rovibrational spectra and slow atomic collisions

我们发现，高激发的双原子分子的振转光谱和密切相关的慢原子碰撞过程包含更多的系统性，需要更少的参数来表征比Rydberg光谱的原子。在一个单一的通道的情况下，例如，我们表明，一个单一的短程参数给出了一个完整的描述几乎所有的角动量的慢碰撞，并涵盖了数百毫开尔文的能量范围。相同的参数也描述了在阈值区域的高激发振转光谱，包括不同角动量的状态。样本应用和预测的理论进行了讨论，包括与实验的比较。

Correlated exponential functions in high precision calculations for diatomic molecules

Various properties of the general two-center two-electron integral over the explicitly correlated exponential function are analyzed for the potential use in high precision calculations for diatomic molecules. A compact one dimensional integral representation is found, which is suited for the numerical evaluation. Together with recurrence relations, it makes possible the calculation of the two-center two-electron integral with arbitrary powers of electron distances. Alternative approach via the Taylor series in the internuclear distance is also investigated. Although numerically slower, it can …

Dissociation slowdown by collective optical response under strong coupling conditions

We consider an ensemble of diatomic molecules resonantly coupled to an optical cavity under strong coupling conditions at normal incidence. Photodissociation dynamics is examined via direct numerical integration of the coupled Maxwell-Schrodinger equations with molecular ro-vibrational degrees of freedom explicitly taken into account. It is shown that the dissociation is significantly affected (slowed down) when the system is driven at its polaritonic frequencies. The observed effect is demonstrated to be of transient nature and has no classical analog. An intuitive explanation of the dissocia…

冷自由基OH分子的相空间操纵

Phase Space Manipulation of Cold Free Radical OH Molecules

我们报告聚束，减慢，和加速的双原子羟基自由基（OH）的超声冷却束。\textit{In situ}沿光束传播路径的激光诱导荧光观察允许通过精确排序的非均匀电场的斯塔克效应的OH分子的纵向相空间操纵的详细表征。

Systematic study and uncertainty evaluation of $P,T$-odd molecular enhancement factors in BaF

A measurement of the magnitude of the electric dipole moment of the electron (eEDM) larger than that predicted by the Standard Model (SM) of particle physics is expected to have a huge impact on the search for physics beyond the SM. Polar diatomic molecules containing heavy elements experience enhanced sensitivity to parity ($P$) and time-reversal ($T$)-violating phenomena, such as the eEDM and the scalar-pseudoscalar (S-PS) interaction between the nucleons and the electrons, and are thus promising candidates for measurements. The NL-\textit{e}EDM collaboration is preparing an experiment to me…

Nonlinear optical response of a gold surface in the visible range: A study by two-color sum-frequency generation spectroscopy. II. Model for metal nonlinear susceptibility

We present a modeling of the nonlinear optical response of a metal surface in order to account for recent experimental results from two-color Sum-Frequency Generation experiments on gold. The model allows calculating the surface and bulk contributions, and explicitly separates free and bound electron terms. Contrary to the other contributions, the perpendicular surface component is strongly model-dependent through the surface electron density profiles. We consider three electron density schemes at the surface, with free and bound electrons overlapping or spilling out of the bulk, for its calcu…