华东师范大学印建平团队研究了超越标准斯塔克减速的相位稳定性。相关论文发表在2025年3月24日出版的《物理评论A》杂志上。

提高冷分子的数量和数量密度是冷分子研究的长期目标。斯塔克减速为驯服极性分子提供了重要途径，并使碰撞和高分辨率光谱成为现实。然而，传统斯塔克减速器的完全减速效率因其固有的损失机制而受到阻碍，这大大限制了其应用。

研究组介绍了一种散布式导向减速策略，该策略超越了传统斯塔克减速器的周期性相位稳定性限制。该方法使用ND₃分子进行了理论和实验验证，在所有最终速度范围内都实现了3∼8的显著增益。此外，该方法需要较低的开关操作次数，这有利于减少高压开关的消耗，并适用于控制大量的减速阶段。

该方法适用于任何传统的交叉销斯塔克减速器，可以阻止更高密度的更广泛的分子物种，包括斯塔克位移质量比较小的分子物种。它有望成为生产冷致密分子样品的重要工具，为冷碰撞研究和精确测量提供了广阔的前景。

附：英文原文

Title: Beyond the phase stability in standard Stark deceleration

Author: Qing Liu, Wenli Li, Shanwu Wang, Chenyue Pan, Du Wang, Tao Yang, Dongdong Zhang, Shunyong Hou, Jianping Yin

Issue&Volume: 2025/03/24

Abstract: Improving the number and number density of cold molecules is a longstanding goal in cold molecule research. Stark deceleration provides an important access to taming polar molecules and makes the collision and high-resolution spectroscopy a reality. However, the full deceleration efficiency of the traditional Stark decelerator has been impeded by its intrinsic loss mechanisms, which significantly limit its applications. In this paper, we introduce an interspersed guiding deceleration strategy that surpasses the periodic phase stability limitations of traditional Stark decelerator. Our approach is theoretically and experimentally validated using the ND3 molecule, achieving significant gains of 3～8 for all final velocity ranges. Additionally, our method requires a lower operation number of switching that is beneficial for reducing the consumption of the high-voltage switches and suitable for controlling a large number of deceleration stages. This method is applicable to any traditional crossed-pin Stark decelerator and can stop a wider variety of molecular species with higher densities, including those with a small Stark shift-to-mass ratio. It is anticipated to become an essential tool for producing cold and dense molecular samples, offering promising prospects for cold collision studies and precision measurements.

DOI: 10.1103/PhysRevA.111.032816

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.111.032816