eprintid: 36586
rev_number: 36
eprint_status: archive
userid: 9021
dir: disk0/00/03/65/86
datestamp: 2025-05-22 07:20:30
lastmod: 2025-05-22 07:20:50
status_changed: 2025-05-22 07:20:30
type: doctoralThesis
metadata_visibility: show
creators_name: Montefiori, Samuele
title: Analytical and Numerical Methods for High-Precision Studies in Ultrarelativistic Strong-Field Quantum Electrodynamics
subjects: ddc-530
divisions: i-130001
divisions: i-851340
adv_faculty: af-13
cterms_swd: Strong Field Quantum Electrodynamics
cterms_swd: SFQED
cterms_swd: Numerical Methods for QED
cterms_swd: Simulations
abstract: This thesis presents a comprehensive exploration of both analytical and numerical techniques used to model processes in ultrarelativistic strong-field quantum electrodynamics (SFQED).
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We developed SFQEDtoolkit, an open-source library that employs advanced function approximation techniques to accurately model nonlinear Compton (NIC) emission and nonlinear Breit-Wheeler (NBW) pair creation processes.
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Simulations combining particle-in-cell (PIC) codes with SFQEDtoolkit have been used to investigate collisions between ultrarelativistic dense electron beams and plasma targets, demonstrating that electron-positron jets exceeding solid densities can be produced within self-generated magnetic fields up to 10 MT.
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These findings reveal a novel regime where SFQED, atomic, and plasma physics are intrinsically interwoven, opening a new avenue of research in SFQED.
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Furthermore, we derive analytical expressions for NIC and NBW differential distributions that describe the energy, angular, spin, and polarization characteristics of the produced particles.
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Notably, the derivation of these distributions, following state-of-the-art methodologies, yields results that can give negative values over certain parameter intervals, undermining their probabilistic interpretation.
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We demonstrate that integrating these distributions over the ``formation time'' of the quantum process restores their conventional physical meaning.
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Overall, the contributions of this thesis advance the analytical and numerical modeling of SFQED processes, providing a robust framework for forthcoming experimental studies of SFQED, which are critically relevant for extreme-field plasma physics and the microphysics of pulsars and magnetars.
date: 2025
id_scheme: DOI
id_number: 10.11588/heidok.00036586
own_urn: urn:nbn:de:bsz:16-heidok-365864
date_accepted: 2025-05-07
advisor: HASH(0x55b82b4e9aa8)
language: eng
bibsort: MONTEFIORIANALYTICAL
full_text_status: public
place_of_pub: Heidelberg
citation:   Montefiori, Samuele  (2025) Analytical and Numerical Methods for High-Precision Studies in Ultrarelativistic Strong-Field Quantum Electrodynamics.  [Dissertation]     
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/36586/5/Samuele%20Montefiori%20-%20PhD%20thesis.pdf
document_url: https://archiv.ub.uni-heidelberg.de/volltextserver/36586/15/erratum.pdf