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DOE OSTI · 3021655

Proposed framework for applying squeezed light to multi-photon absorption plasma diagnostics

Zepp, M. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000170389160)·Beuting, M. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000206624848)·Dangi, M. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0009000644506064)·Den Hartog, D. J. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000316672840)·Geiger, B. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000187061874)·Kasti, J. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0009000183875915)·Smith, D. R. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000309723638)·Vishwanath, N. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0009000388067997)·Choy, J. T. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000286893801)
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Abstract

We propose a quantum-enhanced plasma diagnostic based on squeezed states of light. Squeezed light can exhibit super-Poissonian photon statistics, leading to enhanced multiphoton absorption cross-sections compared to classical light. This effect enables improved sensitivity for two-photon excitation of high-energy atomic transitions such as ground-state excitation, and results in increased absorbed power and fluorescence in a plasma. We consider two methods of generating squeezed states and evaluate their advantages and limitations in the context of plasma absorption diagnostics. By comparing with and extending previous theoretical work, we predict an enhancement of the absorption signal by up to seven orders of magnitude at low intensities (10 1 W/m 2 ), with diminishing enhancement persisting up to high intensities (10 10 W/m 2 ). These results suggest that squeezed-light sources offer a viable pathway toward quantum-enhanced plasma diagnostics.

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BibTeXRIS

Zepp, M. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000170389160), Beuting, M. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000206624848), Dangi, M. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0009000644506064), Den Hartog, D. J. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000316672840), Geiger, B. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000187061874), Kasti, J. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0009000183875915), Smith, D. R. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000309723638), Vishwanath, N. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0009000388067997), Choy, J. T. [Univ. of Wisconsin, Madison, WI (United States)] (ORCID:0000000286893801). 2026-01-26. Proposed framework for applying squeezed light to multi-photon absorption plasma diagnostics. https://doi.org/10.1088/1748-0221%2F21%2F01%2Fc01038

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