近日,德国马克斯·普朗克核物理研究所的Michael Klaiber及其研究团队取得一项新进展。经过不懈努力,他们实现相对论性强场电离的广义解析描述。相关研究成果已于2024年8月5日在国际知名学术期刊《物理评论A》上发表。
该研究团队开发了一种适用于深隧穿至越垒电离(OTBI)机制的强场电离相对论解析理论,该理论还考虑了束缚态极化和超出微扰理论的斯塔克位移。
与当前最先进的佩雷洛莫夫-波波夫-特伦捷夫(PPT)强场电离准经典理论相比,这一改进对于解析描述OTBI机制下的电离,以及解决相对论机制下电离产量与PPT理论之间数量级差异的问题至关重要,而自哈菲兹等人使用克莱因-戈尔登方程得出数值结果以来,这一差异一直未得到解释。与PPT理论不同,本相对论模型的预测可通过相对论强度的超短激光脉冲进行观测。
附:英文原文
Title: Generalized analytical description of relativistic strong-field ionization
Author: Michael Klaiber, Karen Z. Hatsagortsyan, Christoph H. Keitel
Issue&Volume: 2024/08/05
Abstract: A relativistic analytical theory of strong-field ionization applicable across the regimes of deep tunneling up to over-the-barrier ionization (OTBI) is developed, accounting also for the bound-state polarization and the Stark shift beyond perturbation theory. The latter improvement with respect to the state-of-the-art quasiclassical theory of Perelomov-Popov-Terentev (PPT) for strong-field ionization is essential to describe analytically the ionization in the OTBI regime and to resolve the order-of-magnitude discrepancy of the ionization yield in the relativistic regime with respect to PPT theory that has remained unexplained since the numerical result using the Klein-Gordon equation of Hafizi et al. [Phys. Rev. Lett. 118, 133201 (2017)]. The predictions of the present relativistic model, in deviation to PPT theory, are shown to be observable using ultrashort laser pulses of relativistic intensities.
DOI: 10.1103/PhysRevA.110.023103
Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.023103
期刊信息
Physical Review A:《物理评论A》,创刊于1970年。隶属于美国物理学会,最新IF:2.97
官方网址:https://journals.aps.org/pra/
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