Projects per year
Personal profile
Research Interests
Advances in laser technology have facilitated the experimental analysis of atomic structure and electron dynamics in unprecedented detail. Typically, now, we are interested in dynamics which occur on the attosecond scale (1 as = 10-18 s), which is the fundamental time scale of electronic motion in the atom. These dynamics underpin macroscopic processes such as photosynthesis and chemical reactions more generally.
Theoretical methods capable of describing attosecond scale electronic motion typically adopt a classical approach where an electron is driven by a laser field in the net potential of the residual ion. However, the RMT (R-Matrix with Time) method pioneered at QUB allows us to address the interaction of all the electrons in an atomic system. It is these multielectron interactions which mediate ultrafast dynamics and thus it is imperative to address them accurately.
For the last ten years my research has focused on extracting experimental observables from the detailed ab-initio calculations performed with RMT. To this end I have investigated several cutting-edge experimental schemes using the RMT approach, including attosecond transient absorption spectroscopy, strong-field rescattering, XUV initiated high harmonic generation and photoelectron spectroscopy.
Recently my work has been addressed at developing the software tools used for this research. Historically, the scientific computing community has focused on delivering immediate scientific insight, oftentimes at the expense of sustainable development. This has resulted in software that is disjointed, difficult to use, and ultimately unsustainable. With the award of my recent EPSRC Research Software Engineering fellowship I am hoping to address these issues and ensure that the incredible software developed by my colleagues delivers scientific impact for decades to come.
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Network
Projects
- 3 Active
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R1066TCP: UK Atomic, Molecular and Optical physics R-matrix consortium (UK AMOR)
18/06/2019 → …
Project: Research
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R1725TCP: ARMouReD: Atomic R-matrix Method for Relativistic Dynamics
Van Der Hart, H., Ballance, C. & Brown, A.
08/02/2017 → …
Project: Research
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Atomic partial wave meter by attosecond coincidence metrology
Jiang, W., Armstrong, G. S. J., Tong, J., Xu, Y., Zuo, Z., Qiang, J., Lu, P., Clarke, D. D. A., Benda, J., Fleischer, A., Ni, H., Ueda, K., van Der Hart, H. W., Brown, A. C., Gong, X. & Wu, J., 29 Aug 2022, In: Nature Communications. 13, 5072.Research output: Contribution to journal › Article › peer-review
Open AccessFile9 Downloads (Pure) -
Core-resonance line-shape analysis of atoms undergoing strong-field ionization
Hartmann, M., Hutcheson, L., Borisova, G., Birk, P., Hu, S., Brown, A., Van Der Hart, H., Ott, C. & Pfeifer, T., 18 Nov 2022, In: Journal of Physics B: Atomic Molecular and Optical Physics. 55, 24, 7 p., 245601.Research output: Contribution to journal › Article › peer-review
Open AccessFile7 Downloads (Pure) -
Quantum aspects of attoscience
de Morisson Faria, C. F. & Brown, A. C., 07 Oct 2022, In: The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics. 76, 10, 4 p., 182.Research output: Contribution to journal › Editorial › peer-review
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Enhancing spin polarization using ultrafast angular streaking
Armstrong, G. S. J., Clarke, D. D. A., Benda, J., Wragg, J., Brown, A. C. & van der Hart, H. W., 27 May 2021, In: Physical Review A (Atomic, Molecular, and Optical Physics). 103, 053123.Research output: Contribution to journal › Article › peer-review
Open AccessFile95 Downloads (Pure) -
Atomic and molecular suite of R-matrix codes for ultrafast dynamics in strong laser fields and electron/positron scattering
Wragg, J., Benda, J., Mašín, Z., Armstrong, G. S. J., Clarke, D. D. A., Brown, A. C., Ballance, C., Harvey, A. G., Houfek, K., Sunderland, A., Plummer, M., Gorfinkiel, J. D. & Van Der Hart, H., 11 Jun 2020, In: Journal of Physics: Conference Series. 1412, 7, 072017.Research output: Contribution to journal › Letter › peer-review
Open AccessFile43 Downloads (Pure)
Datasets
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Dataset for "Enhancing spin polarization using ultrafast angular streaking"
Armstrong, G. (Creator), Clarke, D. (Contributor), Wragg, J. (Contributor), Benda, J. (Contributor), Brown, A. (Contributor) & Van Der Hart, H. (Contributor), Queen's University Belfast, 30 Apr 2021
DOI: 10.17034/9f15c023-22e3-4a3e-abdc-a20aa09edd75
Dataset
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Electron correlation and short-range dynamics in attosecond angular streaking in the Fluorine anion
Armstrong, G. (Creator), Brown, A. (Creator), Wragg, J. (Creator), Clarke, D. (Creator) & Van Der Hart, H. (Creator), Queen's University Belfast, 10 Apr 2020
DOI: 10.17034/dc24280a-ac0a-4815-908b-a03a9cea1df0
Dataset
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Modeling tomographic measurements of photoelectron vortices in counter-rotating circularly polarized laser pulses
Armstrong, G. (Creator), Clarke, D. (Creator), Wragg, J. (Creator), Brown, A. (Creator) & Van Der Hart, H. (Creator), Queen's University Belfast, 05 Nov 2019
DOI: 10.17034/24d396fc-1744-4431-939d-0658252a854b
Dataset
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Rotational asymmetry in photodetachment from F- in circularly polarised laser fields
Armstrong, G. (Creator), Clarke, D. (Creator), Brown, A. (Creator) & Van Der Hart, H. (Creator), Queen's University Belfast, 06 Feb 2019
DOI: 10.17034/f087c320-7579-4942-a95f-f7cd66d6a0c2
Dataset
File -
Electron vortices in He and F-
Brown, A. (Creator), Clarke, D. (Creator), Van Der Hart, H. (Creator) & Armstrong, G. (Creator), Queen's University Belfast, 25 Oct 2018
DOI: 10.17034/668e9c0f-a1f1-4d48-b982-56b375c2fb93
Dataset
File
Prizes
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Best Student Speaker
Brown, Andrew (Recipient), 28 Jun 2012
Prize: Prize (including medals and awards)
Activities
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The RMT project: Adventures in spin
Andrew Brown (Invited speaker)
10 Feb 2021Activity: Talk or presentation types › Invited talk
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The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics (Journal)
Andrew Brown (Peer reviewer)
21 Sep 2020 → 30 Sep 2020Activity: Publication peer-review and editorial work types › Publication peer-review
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The RMT project
Andrew Brown (Invited speaker)
10 Sep 2020Activity: Talk or presentation types › Invited or keynote talk at national or international conference
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European Journal of Physics (Journal)
Andrew Brown (Guest editor)
21 Jul 2020 → …Activity: Publication peer-review and editorial work types › Editorial activity
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Quantum Battles
Andrew Brown (Chair)
01 Jul 2020 → 03 Jul 2020Activity: Participating in or organising an event types › Participation in workshop, seminar, course
Press/Media
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Mathsweek Ireland promotion 2016
21/10/2016
1 Media contribution
Press/Media: Public Engagement Activities
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SET for Britain poster competition at the Houses of Parliament
14/02/2014
1 item of Media coverage
Press/Media: Public Engagement Activities