Attosecond Quantum Optical Spectroscopy of Topological Materials
Abstract
High-harmonic generation (HHG) provides an ultrafast probe of quantum materials, yet conventional spectral observables do not generally furnish a common signature of band topology. Here we show that quantum-light-driven HHG opens an additional information channel through the photon statistics of the emitted harmonics. Using the Haldane Chern insulator and the time-reversal-invariant Kane-Mele topological insulator, we calculate helicity-resolved equal-time intensity correlations and identify a common enhancement of high-order harmonic correlations in the topological phases. For the Haldane model, a dichroic correlation constructed from opposite helicity channels reverses sign with the Chern number. These signatures originate from the distinct nonlinear response sampled by quantum fluctuations of the driving field and are absent from the corresponding mean harmonic spectra as a common classifier. Our results establish photon-correlation spectroscopy as a route to interrogate topological matter with quantum light and provide a bridge between strong-field solid-state physics and quantum optics.
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BibTeX
@misc{granados2026attosecond,
title = {{Attosecond Quantum Optical Spectroscopy of Topological Materials}},
author = {C. Granados and J. Rivera-Dean and D. Kim and A. Chacón and W. Gao and P. Stammer},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.28046},
eprint = {2610.28046},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.28046},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Attosecond Quantum Optical Spectroscopy of Topological Materials
AU - C. Granados
AU - J. Rivera-Dean
AU - D. Kim
AU - A. Chacón
AU - W. Gao
AU - P. Stammer
PY - 2026
DA - 2026/10/20
PB - arXiv
DO - 10.48550/arxiv.2610.28046
UR - https://arxiv.org/abs/2610.28046
AB - High-harmonic generation (HHG) provides an ultrafast probe of quantum materials, yet conventional spectral observables do not generally furnish a common signature of band topology. Here we show that quantum-light-driven HHG opens an additional information channel through the photon statistics of the emitted harmonics. Using the Haldane Chern insulator and the time-reversal-invariant Kane-Mele topological insulator, we calculate helicity-resolved equal-time intensity correlations and identify a common enhancement of high-order harmonic correlations in the topological phases. For the Haldane model, a dichroic correlation constructed from opposite helicity channels reverses sign with the Chern number. These signatures originate from the distinct nonlinear response sampled by quantum fluctuations of the driving field and are absent from the corresponding mean harmonic spectra as a common classifier. Our results establish photon-correlation spectroscopy as a route to interrogate topological matter with quantum light and provide a bridge between strong-field solid-state physics and quantum optics.
ER -