Hidden Perturbative Structure in Attosecond Streaking
Abstract
Attosecond streaking is inherently multiphoton, yet we uncover a hidden perturbative structure revealing the underlying continuum--continuum angular-momentum propensity. By filtering the inversion-odd response in helium streaking data at the IR fundamental, we isolate an angular distribution dominated by the P1 and P3 Legendre components, whose complex coefficients yield an effective s/d two-photon amplitude ratio. Multichannel, two-electron time-dependent Schrödinger equation calculations demonstrate that the characteristic Fano propensity survives electron correlation. Incorporating the experimental XUV attochirp reproduces the measured emission-edge trend, while near-threshold calculations predict resonant amplitude and phase signatures associated with the bound He np Rydberg series. This symmetry- and frequency-filtering approach offers a general spectroscopic framework with potential applications to atomic, molecular, and solid-state systems where attosecond streaking is established.
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BibTeX
@misc{gao2026hidden,
title = {{Hidden Perturbative Structure in Attosecond Streaking}},
author = {Jingsong Gao and Mahmudul Hasan and Zach Eisenhutt and Vladislav Serov and Hao Liang and Meng Han and Anatoli Kheifets},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.24891},
eprint = {2610.24891},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.24891},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Hidden Perturbative Structure in Attosecond Streaking
AU - Jingsong Gao
AU - Mahmudul Hasan
AU - Zach Eisenhutt
AU - Vladislav Serov
AU - Hao Liang
AU - Meng Han
AU - Anatoli Kheifets
PY - 2026
DA - 2026/10/22
PB - arXiv
DO - 10.48550/arxiv.2610.24891
UR - https://arxiv.org/abs/2610.24891
AB - Attosecond streaking is inherently multiphoton, yet we uncover a hidden perturbative structure revealing the underlying continuum--continuum angular-momentum propensity. By filtering the inversion-odd response in helium streaking data at the IR fundamental, we isolate an angular distribution dominated by the P_1 and P_3 Legendre components, whose complex coefficients yield an effective s/d two-photon amplitude ratio. Multichannel, two-electron time-dependent Schrödinger equation calculations demonstrate that the characteristic Fano propensity survives electron correlation. Incorporating the experimental XUV attochirp reproduces the measured emission-edge trend, while near-threshold calculations predict resonant amplitude and phase signatures associated with the bound He np Rydberg series. This symmetry- and frequency-filtering approach offers a general spectroscopic framework with potential applications to atomic, molecular, and solid-state systems where attosecond streaking is established.
ER -