Quantum-Enhanced Sensing of Excited-State Dynamics with Correlated Photons

• URL: http://arxiv.org/abs/2508.11311v1
• Date: Fri, 15 Aug 2025 08:29:25 GMT
• Title: Quantum-Enhanced Sensing of Excited-State Dynamics with Correlated Photons
• Authors: Jiahao Joel Fan, Feihong Liu, Dangyuan Lei, Zhedong Zhang,
• Abstract summary: We study the transient absorption scheme using the squeezed photons.<n>A microscopic theory is developed, revealing a highly time-energy-resolved nature of the signal.<n>Our work offers a new paradigm for studying nonequilibrium dynamics of matter, in light of the photocatalysis and optoelectronics.
• Score: 0.42855555838080833
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: The squeezed photons, as a quantum-correlated light with reduced noise, have emerged as a great resource for sensing the structures of matter. Here we study the transient absorption (TA) scheme using the squeezed photons whose spectral correlation of amplitudes can be tailored. A microscopic theory is developed, revealing a highly time-energy-resolved nature of the signal that is not attainable by conventional TA scheme. Such a capability is elaborated by applying to monolayer transition metal dichalcogenide materials (TMDs), achieving a real-time monitoring of valley excitons and their dynamics. Moreover, we show the intermediate squeezing regime-not the strong squeezing-which the time-resolved spectroscopy is in favor of. Our work offers a new paradigm for studying nonequilibrium dynamics of matter, in light of the photocatalysis and optoelectronics.

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