[论文解读] Full symmetry-breaking of electronic and nuclear dynamics for low attosecond resolution of electronic chirality

Tianlv Xu, Jiawen Kong+6 more|arXiv (Cornell University)|Jan 12, 2026

Laser-Matter Interactions and Applications被引用 0

一句话总结

此论文在极短 Circularly Polarized 脉冲下展示对称性破缺的电子与核动力学，实现对电子手性分配的 attosecond 量级分辨率，并揭示 cardioid-like 与 toroidal 电荷密度形态。

ABSTRACT

Attosecond science is an emerging topic where chirality plays a central role. Here we demonstrate subjecting iodoacetylene, a geometrically achiral molecule, to a pair of simulated non-ionizing ultrafast circularly polarized laser pulses at the highest time resolution to date, by two orders of magnitude (3.87 attoseconds), of the continuously-valued S and R electronic chirality assignments. We partner the only vector-based quantum chemical physics theory enabling full symmetry-breaking with electronic and nuclear dynamics simulations: the former does not require charge density differences or special symmetry positions. The resulting 'easy' and 'hard' directions of the total electronic charge density motion are quantified as a cardioid-like morphology for the duration of the simulated laser pulses and toroidal afterwards. Future research directions include determination of the underlying mechanism governing chiral induced spin selectivity, in addition to application to chiral spin selective phenomena in opto-spintronics and exotic superconductors, partnered with orbital-free density functional theory (OF-DFT).

研究动机与目标

• Motivating the study of chirality in attosecond-scale dynamics and its impact on electronic and nuclear motion.
• Showcase a vector-based quantum chemical framework enabling full symmetry-breaking without relying on charge-density differences.
• Quantify the resulting charge-density motion morphology during and after laser interaction.
• Highlight potential applications to chiral-induced spin selectivity and opto-spintronics.

提出的方法

• 将碘乙炔暴露于一对模拟的非电离性极快圆偏振激光脉冲。
• 使用一种基于矢量的量子化学物理理论，使电子与核动力学模拟能够实现完整对称性破缺。
• 在分辨率达到 3.87 attoseconds 的情况下，连续赋予 S 和 R 电子手性分配。
• 将脉冲期间的总电子电荷密度运动表征为 cardioid-like，脉冲后为 toroidal。

实验结果

研究问题

• RQ1 在 attosecond 级圆偏振激发下，是否能够实现电子与核动力学的完全对称性破缺？
• RQ2 在模拟脉冲作用下，S/R 手性分配如何在亚 attosecond 分辨率下演化？
• RQ3 激发期间及之后，总电子电荷密度运动的形态为何？
• RQ4 对手性诱导自旋选择性及相关光自旋电子学现象有何影响？

主要发现

• 实现了 attosecond 量级（3.87 as）对连续 S 与 R 手性分配的解析分配。
• 基于矢量的理论实现了电子与核动力学中的完全对称性破缺，而不依赖于电荷密度差异。
• 电荷密度运动在脉冲期间呈 cardioid-like 形态，脉冲后呈 toroidal 形态。
• 结果指向手性诱导自旋选择性的潜在机制及未来与 OF-DFT 相关的工作方向。
• 该研究将对称性破缺动力学与光自旋电子学及超导体中的潜在手性自旋现象联系起来。