英国伦敦国王学院Anne Weber团队研究了无势垒量子隧穿。2025年4月2日，《物理评论A》杂志发表了这一成果。

隧穿是一个标志性的概念，它捕捉到了量子动力学的特殊性，但尽管它无处不在，问题仍然存在。研究组专注于强场隧穿，这对所有阿秒科学都至关重要。他们发现，当瞬时电场消失且没有势垒时，会发生一个意想不到的光学隧穿事件。

该事件源于强多色场中的颜色转换。没有势垒的隧穿揭示了建立在准静态势垒图像上的标准直觉与该过程的非绝热性质之间的脱节。

附：英文原文

Title: Quantum tunneling without a barrier

Author: Anne Weber, Margarita Khokhlova, Emilio Pisanty

Issue&Volume: 2025/04/02

Abstract: Tunneling is an iconic concept that captures the peculiarity of quantum dynamics but, despite its ubiquity, questions remain. We focus on strong-field tunneling, which is vital to all attosecond science. We find an unexpected optical tunneling event that happens when the instantaneous electric field vanishes and there is no barrier. This event arises from a color switchover in a strongly polychromatic field. The tunneling without a barrier reveals the disconnect between the standard intuition built on the picture of a quasistatic barrier and the nonadiabatic nature of the process.

DOI: 10.1103/PhysRevA.111.043103

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.111.043103