Time-resolved transient absorption spectroscopy with quantum light
Abstract
We present a fully quantum theory of time-resolved transient absorption spectroscopy, providing a general framework for describing the linear response of a nonequilibrium target to quantum probe fields beyond the semiclassical approximation. We elucidate how quantum correlations between probe-field frequency modes couple to coherences in the target and derive a simple expression for computing the resulting spectroscopic signals. We identify conditions under which quantum light can modify transient absorption spectra beyond the limits achievable with classical fields. Our work establishes a theoretical foundation for exploiting quantum light in ultrafast spectroscopy and suggests new routes for resolving dynamics in matter on timescales shorter than the duration of the probe pulse.
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BibTeX
@misc{yuan2026timeresolved,
title = {{Time-resolved transient absorption spectroscopy with quantum light}},
author = {Mingrui Yuan and Nikolay V. Golubev},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.26041},
eprint = {2610.26041},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.26041},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Time-resolved transient absorption spectroscopy with quantum light
AU - Mingrui Yuan
AU - Nikolay V. Golubev
PY - 2026
DA - 2026/10/19
PB - arXiv
DO - 10.48550/arxiv.2610.26041
UR - https://arxiv.org/abs/2610.26041
AB - We present a fully quantum theory of time-resolved transient absorption spectroscopy, providing a general framework for describing the linear response of a nonequilibrium target to quantum probe fields beyond the semiclassical approximation. We elucidate how quantum correlations between probe-field frequency modes couple to coherences in the target and derive a simple expression for computing the resulting spectroscopic signals. We identify conditions under which quantum light can modify transient absorption spectra beyond the limits achievable with classical fields. Our work establishes a theoretical foundation for exploiting quantum light in ultrafast spectroscopy and suggests new routes for resolving dynamics in matter on timescales shorter than the duration of the probe pulse.
ER -