Benchmarking Atomic Ionization Driven by Strong Quantum Light

• URL: http://arxiv.org/abs/2512.15458v1
• Date: Wed, 17 Dec 2025 13:59:28 GMT
• Title: Benchmarking Atomic Ionization Driven by Strong Quantum Light
• Authors: Yi-Jia Mao, En-Rui Zhou, Yang Li, Pei-Lun He, Feng He,
• Abstract summary: We solve the time-dependent Schrdinger equation for an atom exposed to bright squeezed vacuum light.<n>Our results provide both quantitative benchmarks and fundamental theoretical insights for the emerging field of strong-field quantum optics.
• Score: 2.874172237999062
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The recently available high-intensity quantum light pulses provide novel tools for controlling light-matter interactions. However, the rigor of the theoretical frameworks currently used to describe the interaction of strong quantum light with atoms and molecules remains unverified. Here, we establish a rigorous benchmark by solving the fully quantized time-dependent Schrödinger equation for an atom exposed to bright squeezed vacuum light. Our \textit{ab initio} simulations reveal a critical limitation of the widely used $Q$-representation: although it accurately reproduces the total photoelectron spectrum after tracing over photon states, it completely fails to capture the electron-photon joint energy spectrum. To overcome this limitation, we develop a general theoretical framework based on the Feynman path integral that properly incorporates the electron-photon quantum entanglement. Our results provide both quantitative benchmarks and fundamental theoretical insights for the emerging field of strong-field quantum optics.

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