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Parity-mixing interference in laser-assisted photoionization

Ouahioune, Nedjma LU orcid ; Hoff, Dominik LU ; Maroju, Praveen Kumar LU ; Arnold, Cord LU ; Busto, David LU orcid ; Lhuillier, A LU orcid ; Gisselbrecht, Mathieu LU orcid and Carlström, Stefanos LU (2026) In arXiv.org
Abstract
Photoionization of atoms by high-order harmonics in the presence of a laser may lead to quantum interference from which information about the photoionization dynamics or the light fields can be extracted. Traditionally, this interference arises from two-photon transitions involving the absorption of consecutive harmonics combined with the absorption and stimulated emission of a laser photon. In this process, parity is conserved. Here, we investigate interference between one- and two-photon transitions in helium using high-order harmonics generated by a few-cycle laser and three-dimensional electron detection. In this case, parity is not conserved. We identify four parity-mixing interference pathways, involving two different harmonic fields... (More)
Photoionization of atoms by high-order harmonics in the presence of a laser may lead to quantum interference from which information about the photoionization dynamics or the light fields can be extracted. Traditionally, this interference arises from two-photon transitions involving the absorption of consecutive harmonics combined with the absorption and stimulated emission of a laser photon. In this process, parity is conserved. Here, we investigate interference between one- and two-photon transitions in helium using high-order harmonics generated by a few-cycle laser and three-dimensional electron detection. In this case, parity is not conserved. We identify four parity-mixing interference pathways, involving two different harmonic fields or a single harmonic, together with absorption or emission of a probe photon. (Less)
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author
; ; ; ; ; ; and
organization
publishing date
type
Working paper/Preprint
publication status
published
subject
keywords
Laser-Assisted Photoionization, Parity-mixing, Electron wavepacket, Attosecond physics
in
arXiv.org
publisher
arXiv.org
ISSN
2331-8422
DOI
10.48550/arXiv.2604.14028
language
English
LU publication?
yes
id
efaabac0-9abe-4b4c-a1f5-092c63062145
date added to LUP
2026-06-04 15:46:33
date last changed
2026-06-06 03:27:22
@misc{efaabac0-9abe-4b4c-a1f5-092c63062145,
  abstract     = {{Photoionization of atoms by high-order harmonics in the presence of a laser may lead to quantum interference from which information about the photoionization dynamics or the light fields can be extracted. Traditionally, this interference arises from two-photon transitions involving the absorption of consecutive harmonics combined with the absorption and stimulated emission of a laser photon. In this process, parity is conserved. Here, we investigate interference between one- and two-photon transitions in helium using high-order harmonics generated by a few-cycle laser and three-dimensional electron detection. In this case, parity is not conserved. We identify four parity-mixing interference pathways, involving two different harmonic fields or a single harmonic, together with absorption or emission of a probe photon.}},
  author       = {{Ouahioune, Nedjma and Hoff, Dominik and Maroju, Praveen Kumar and Arnold, Cord and Busto, David and Lhuillier, A and Gisselbrecht, Mathieu and Carlström, Stefanos}},
  issn         = {{2331-8422}},
  keywords     = {{Laser-Assisted Photoionization; Parity-mixing; Electron wavepacket; Attosecond physics}},
  language     = {{eng}},
  note         = {{Preprint}},
  publisher    = {{arXiv.org}},
  series       = {{arXiv.org}},
  title        = {{Parity-mixing interference in laser-assisted photoionization}},
  url          = {{http://dx.doi.org/10.48550/arXiv.2604.14028}},
  doi          = {{10.48550/arXiv.2604.14028}},
  year         = {{2026}},
}