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High-order above-threshold ionization by squeezed coherent light

D. Habibović1 and D. B. Milošević1,2,*

  • *Contact author: milo@bih.net.ba
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Phys. Rev. A 113, 043124 – Published 21 April, 2026

DOI: https://doi.org/10.1103/yrpf-r7p6

Abstract

Squeezed coherent quantum light is described by the complex squeeze parameter ζ=seiϑ and the coherent-state displacement parameter β=|β|eiϕβ. Our study of strong-field ionization [D. Habibović and D. B. Milošević, Phys. Rev. A 112, L051103 (2025)], which focused on bright squeezed vacuum quantum light with β=0 and s≫1, is extended to ionization by squeezed coherent light. It is shown that the amplitudes s and |β| strongly influence the ionization process, whereas phases ϑ and ϕβ play a less significant role. The present work provides a unified treatment of coherent, squeezed vacuum, and squeezed coherent light within a single theoretical framework. The quantum nature of the driving field is incorporated by averaging the strong-field ionization probability over the Husimi-Kano phase-space distribution. Using neon as a representative target, we analyze how the parameters characterizing squeezed coherent light modify photoelectron spectra and intensity-dependent enhancements. We show that nonclassical photon statistics can lead to a pronounced steepening of the rescattering plateau and, at low mean intensities, to an effective suppression of the nominal high-energy cutoff. These effects originate from the reduced weight of high-intensity field components inherent to squeezed states and have no analog in strong-field ionization driven by a coherent light. Our results highlight the potential for quantum-statistical control of strong-field ionization and provide a foundation for exploring laser-matter interactions driven by quantum light.

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Phys. Rev. A 113, 043124– Published 21 April, 2026
  • Received 19 January 2026
  • Accepted 6 April 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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