Numerical Experiment Based on Monte Carlo Stochastic Algorithm: Control of Strong-Field Double Ionization Dynamics by Carrier-Envelope Phase
Year: 2026
Type: article
Abstract: Nonsequential double ionization is a fundamental process in ultrafast strong-field physics, containing rich information about electron correlation dynamics. In few-cycle laser fields, the carrier-envelope phase becomes a key parameter for controlling electron behavior. However, this process involves nonlinear mechanisms such as multi-electron stochastic dynamics and complex Coulomb interactions, posing significant challenges to traditional analytical theories. To address this, this work develops a numerical experimental approach based on a Monte Carlo stochastic algorithm, transforming the quantum problem into a computable stochastic sampling task. Through statistical sampling and final-state analysis of tens of millions of quantum trajectories, the central regulatory role of the carrier-envelope phase is systematically revealed. The computational results show that this phase can not only independently regulate the yields of double ionization and frustrated double ionization but also control the branching ratio between them, with a peak-to-peak modulation amplitude of approximately 20%. Additionally, it enables fine-tuning of the electron momentum correlation distribution. The physical mechanisms underlying these regulatory effects are clearly elucidated through analysis of the quantum trajectories. This work not only clarifies the critical role of the carrier-envelope phase in few-cycle intense-field double ionization but also demonstrates the powerful capability of the Monte Carlo stochastic algorithm in revealing the intrinsic stochasticity of strong-field physics and achieving precise physical control, providing an example for the deep integration of intense-field physics and computational science.
Source: Photonics
Authors: Yuxing Bai, Xiao-Lei Hao
Institution: Shanxi University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,896
OpenAlex ID: W7154187601