Abstract：
Recently it has been shown that two coincident well designed laser pulses with two different combinations of circular polarizations ( ++ or -+ ) can create chiral electronic densities in an oriented heteronuclear diatomic molecule. Subsequently, the chirality flips from the electronic Ra to Sa to Ra to Sa etc. enantiomers, with periods in the femtosecond (fs) and attosecond (as) time domains. The results were obtained by means of quantum dynamics simulations for oriented NaK. Here we investigate the electronic chirality flips in oriented RbCs induced by all possible ( ++ , -+ , +- , -- ) combinations of circular polarizations of two coincident well-designed laser pulses. Accordingly, the ++ and -- as well as the +- and -+ combinations generate opposite electronic enantiomers, e. g. Ra versus Sa, followed by opposite periodic chirality flips, e.g. form Ra to Sa to Ra to Sa etc. versus form Sa to Ra to Sa to Ra etc, with periods in the fs and as time domains, respectively. The laser induced spatio-temporal symmetries are derived from first principles and illustrated by quantum dynamics simulations.
摘要：
最近，已经表明，具有两种不同的圆极化组合（或-）的两个设计良好的激光脉冲可以在定向的异核双原子分子中产生手性电子密度。随后，手性从电子Ra翻转到Sa到Ra到Sa等。对映体，周期在飞秒(fs)和阿秒(as)时域中。结果是通过定向NaK的量子动力学模拟获得的。在这里，我们研究了所有可能（++，-+,+-,-）两个设计合理的激光脉冲的圆偏振组合。因此，++和-以及-和-组合产生相反的电子对映异构体，e.g.Ra对Sa，随后是相反的周期性手性翻转，例如形成Ra至Sa至Ra至Sa等。相对于形式Sa至Ra至Sa至Ra等，周期在fs中，作为时域，分别。激光诱导的时空对称性来自第一性原理，并通过量子动力学模拟进行了说明。
