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A spectral-dip fingerprint of quantum path interference in high harmonic generation.

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Title: A spectral-dip fingerprint of quantum path interference in high harmonic generation.
Authors: Shu, Zheng1,2 (AUTHOR) zheng_shu@sxu.edu.cn, Wang, Yichen3 (AUTHOR), Zhao, Yiwen3 (AUTHOR), Ma, Jing3 (AUTHOR), Liu, Bodun3 (AUTHOR), Hao, Xiaolei1,2 (AUTHOR), Ma, Ri3 (AUTHOR) rma@jlu.edu.cn, Jing Chen4,5 (AUTHOR) chenjing@ustc.edu.cn
Source: Journal of Physics B: Atomic, Molecular & Optical Physics. 2026, Vol. 59 Issue 12, p1-12. 12p.
Subjects: Quantum interference, Quantum trajectories, Picosecond pulses, Attosecond pulses, Light intensity, Harmonic generation, Argon
Abstract: High harmonic spectroscopy, as a self-referenced attosecond technique, is widely used to probe electronic structure and dynamics in both atoms and polyatomic molecules. In this study, we theoretically and experimentally investigate the high-harmonic spectra of argon at various laser intensities, revealing a distinctive spectral minimum in the near cutoff region. This feature, attributed to the destructive interference between short and long electron trajectories, serves as a spectroscopic fingerprint of quantum path interference. By analyzing the relative contributions and phases of these quantum paths, we demonstrate that the spectral minimum represents a new modulation pattern of quantum path interference with a period of 0.2 × 10 14 W cm − 2 . This provides new insights into the dynamics of electron trajectories and offers a potential diagnostic tool for observing and controlling ultrafast electronic processes in laser-matter interactions. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Physics B: Atomic, Molecular & Optical Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 194583543
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: A spectral-dip fingerprint of quantum path interference in high harmonic generation.
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  Data: <searchLink fieldCode="AR" term="%22Shu%2C+Zheng%22">Shu, Zheng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> zheng_shu@sxu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Yichen%22">Wang, Yichen</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Yiwen%22">Zhao, Yiwen</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Jing%22">Ma, Jing</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Bodun%22">Liu, Bodun</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hao%2C+Xiaolei%22">Hao, Xiaolei</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ma%2C+Ri%22">Ma, Ri</searchLink><relatesTo>3</relatesTo> (AUTHOR)<i> rma@jlu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Jing+Chen%22">Jing Chen</searchLink><relatesTo>4,5</relatesTo> (AUTHOR)<i> chenjing@ustc.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Physics+B%3A+Atomic%2C+Molecular+%26+Optical+Physics%22">Journal of Physics B: Atomic, Molecular & Optical Physics</searchLink>. 2026, Vol. 59 Issue 12, p1-12. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Quantum+interference%22">Quantum interference</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+trajectories%22">Quantum trajectories</searchLink><br /><searchLink fieldCode="DE" term="%22Picosecond+pulses%22">Picosecond pulses</searchLink><br /><searchLink fieldCode="DE" term="%22Attosecond+pulses%22">Attosecond pulses</searchLink><br /><searchLink fieldCode="DE" term="%22Light+intensity%22">Light intensity</searchLink><br /><searchLink fieldCode="DE" term="%22Harmonic+generation%22">Harmonic generation</searchLink><br /><searchLink fieldCode="DE" term="%22Argon%22">Argon</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: High harmonic spectroscopy, as a self-referenced attosecond technique, is widely used to probe electronic structure and dynamics in both atoms and polyatomic molecules. In this study, we theoretically and experimentally investigate the high-harmonic spectra of argon at various laser intensities, revealing a distinctive spectral minimum in the near cutoff region. This feature, attributed to the destructive interference between short and long electron trajectories, serves as a spectroscopic fingerprint of quantum path interference. By analyzing the relative contributions and phases of these quantum paths, we demonstrate that the spectral minimum represents a new modulation pattern of quantum path interference with a period of 0.2 × 10 14 W cm − 2 . This provides new insights into the dynamics of electron trajectories and offers a potential diagnostic tool for observing and controlling ultrafast electronic processes in laser-matter interactions. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Physics B: Atomic, Molecular & Optical Physics is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1088/1361-6455/ae73ca
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      – Code: eng
        Text: English
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        PageCount: 12
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    Subjects:
      – SubjectFull: Quantum interference
        Type: general
      – SubjectFull: Quantum trajectories
        Type: general
      – SubjectFull: Picosecond pulses
        Type: general
      – SubjectFull: Attosecond pulses
        Type: general
      – SubjectFull: Light intensity
        Type: general
      – SubjectFull: Harmonic generation
        Type: general
      – SubjectFull: Argon
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      – TitleFull: A spectral-dip fingerprint of quantum path interference in high harmonic generation.
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              Text: 2026
              Type: published
              Y: 2026
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