Quantum-Enhanced Sensing of Excited-State Dynamics with Correlated Photons
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.
Keywords
Cite
@article{arxiv.2508.11311,
title = {Quantum-Enhanced Sensing of Excited-State Dynamics with Correlated Photons},
author = {Jiahao Joel Fan and Feihong Liu and Dangyuan Lei and Zhedong Zhang},
journal= {arXiv preprint arXiv:2508.11311},
year = {2026}
}
Comments
7 pages, 3 figures