Hund's paradox and the collisional stabilization of chiral molecules

Optical Activity, Hund Paradox, and Molecular Parity Violation

We study the problem of stability of optical activity, also known as Hund paradox, in a two-dimensional approximation of a double-well potential. We discuss how the introduction of molecular parity violation breaks the symmetry of the potential. By using a dynamical approach, we show how this effect modifies the dynamics and can stabilize the chiral states for some molecules.

臭名昭著的边界能否在 macromolecules 中找到？兼论 von Neumann 系综与 Schroedinger 系综，以及量子化学中的“Hund 佯谬”

Can the Infamous Boundary Be Found in Macromolecules? Also, von Neumann vs. Schroedinger ensembles, and `Hund's Paradox' in quantum chemistry

本文探讨经典-量子分界（臭名昭著的边界）是否可能位于 macromolecules 层级，并将其与热力学系综选择和量子化学中的 Hund 佯谬联系起来，进而提出一个可在不对称 macromolecules 中揭示该边界的实验方案。

Enantiomer superpositions from matter-wave interference of chiral molecules

Molecular matter-wave interferometry enables novel strategies for manipulating the internal mechanical motion of complex molecules. Here, we show how chiral molecules can be prepared in a quantum superposition of two enantiomers by far-field matter-wave diffraction and how the resulting tunnelling dynamics can be observed. We determine the impact of ro-vibrational phase averaging and propose a setup for sensing enantiomer-dependent forces, parity-violating weak interactions, and environment-induced superselection of handedness, as suggested to resolve Hund's paradox. Using ab-initio tunnelling…