Browsing School of Engineering, Computing and Mathematics by Author "d11049c47687424aa67270fca7a4dd85"
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Icelimit of Coulomb gauge YangMills theory
Heinzl, T; Ilderton, A; Langfeld, K; Lavelle, M; McMullan, D (20081027)In this paper we describe gauge invariant multiquark states generalising the path integral framework developed by Parrinello, JonaLasinio and Zwanziger to amend the FaddeevPopov approach. This allows us to produce ... 
Is the ground state of YangMills theory Coulombic?
Heinzl, T; Ilderton, A; Langfeld, K; Lavelle, M; Lutz, W; McMullan, D (20080606)We study trial states modelling the heavy quarkantiquark ground state in SU(2) YangMills theory. A state describing the flux tube between quarks as a thin string of glue is found to be a poor description of the continuum ... 
Letter of Intent for the LUXE Experiment
Abramowicz, H; Altarelli, M; Aßmann, R; Behnke, T; Benhammou, Y; Borysov, O; Borysova, M; Brinkmann, R; Burkart, F; Büßer, K; Davidi, O; Decking, W; Elkina, N; Harsh, H; Hartin, A; Hartl, I; Heinemann, B; Heinzl, T; TalHod, N; Hoffmann, M; Ilderton, A; King, B; Levy, A; List, J; Maier, AR; Negodin, E; Perez, G; Pomerantz, I; Ringwald, A; Rödel, C; Saimpert, M; Salgado, F; Sarri, G; Savoray, I; Teter, T; Wing, M; Zepf, M (20190902)This Letter of Intent describes LUXE (Laser Und XFEL Experiment), an experiment that aims to use the highquality and highenergy electron beam of the European XFEL and a powerful laser. The scientific objective of the ... 
Mode truncations and scattering in strong fields
Heinzl, T; Ilderton, A; Seipt, D (20180216)Truncating quantum field theories to a dominant mode offers a nonperturbative approach to their solution. We consider here the interaction of charged scalar matter with a single mode of the electromagnetic field. The ... 
Nonperturbative pair production in interpolating fields
Ilderton, A; Torgrimsson, G; Wårdh, J (20150630)We compare the effects of timelike, lightlike and spacelike onedimensional inhomogeneities on the probability of nonperturbative pair production in strong fields. Using interpolating coordinates we give a unifying picture ... 
A note on the conjectured breakdown of QED perturbation theory in strong fields
Ilderton, A (American Physical Society, 20190403)Strong background fields require a nonperturbative treatment, which is afforded in QED by the Furry expansion of scattering amplitudes. It has been conjectured that this expansion breaks down for sufficiently strong ... 
Onephoton pair annihilation in pulsed planewave backgrounds
Tang, S; Ilderton, A; King, B 
Physical charges in QED and QCD
Ilderton, A; Lavelle, M; McMullan, D (20091028)We show that the `dressing' approach, which describes physical charges as gauge invariant composites of matter and clouds of gauge bosons, arises naturally in gauge theories. We give perturbative examples of dressings for ... 
Probing the ground state in gauge theories
Heinzl, T; Ilderton, A; Langfeld, K; Lavelle, M; Lutz, W; McMullan, D (20070921)We consider two very different models of the flux tube linking two heavy quarks: a string linking the matter fields and a Coulombic description of two separately gauge invariant charges. We compare how close they are to ... 
Reaching supercritical field strengths with intense lasers
Blackburn, TG; Ilderton, A; Marklund, M; Ridgers, CP (IOP Publishing, 20190430)It is conjectured that all perturbative approaches to quantum electrodynamics (QED) break down in the collision of a highenergy electron beam with an intense laser, when the laser fields are boosted to ’supercritical’ ... 
Realising SingleShot Measurements of Quantum Radiation Reaction in HighIntensity Lasers
Baird, CD; Murphy, CD; Blackburn, TG; Ilderton, A; Mangles, SPD; Marklund, M; Ridgers, CP (IOP Publishing, 20190423)Collisions between high intensity laser pulses and energetic electron beams are now used to measure the transition between the classical and quantum regimes of lightmatter interactions. However, the energy spectrum of ... 
Reducible contributions to quantum electrodynamics in external fields
Ahmadiniaz, N; Edwards, JP; Ilderton, A (Springer Verlag (Germany), 20190507)We consider oneparticle reducible (1PR) contributions to QED and scalar QED processes in external fields, at one loop and two loops. We investigate three cases in detail: constant crossed fields, constant magnetic fields, ... 
Reduction of order, resummation and radiation reaction
Ekman, R; Heinzl, T; Ilderton, A (20210504) 
Reduction of order, resummation, and radiation reaction
Ekman, R; Heinzl, T; Ilderton, A (American Physical Society, 20210806) 
Renormalisation group flow of the JaynesCummings model
Ilderton, AThe JaynesCummings model is a cornerstone of lightmatter interactions. While finite, the model provides an illustrative example of renormalisation in perturbation theory. We show, however, that exact renormalisation ... 
Resummation of backgroundcollinear corrections in strong field QED
Edwards, JP; Ilderton, A (American Physical Society, 20210105) 
Scaling laws for positron production in laser–electronbeam collisions
Blackburn, TG; Ilderton, A; Murphy, CD; Marklund, M (20170824) 
Scattering in strong electromagnetic fields: Transverse size effects in timedependent basis lightfront quantization
Hu, B; Ilderton, A; Zhao, X (American Physical Society (APS), 20200723) 
Screwsymmetric gravitational waves: A double copy of the vortex
Ilderton, A (20180710)© 2018 The Author(s) Plane gravitational waves can admit a sixth 'screw’ isometry beyond the usual five. The same is true of plane electromagnetic waves. From the point of view of integrable systems, a sixth isometry would ... 
Selfabsorption of synchrotron radiation in a laserirradiated plasma
Blackburn, TG; MacLeod, AJ; Ilderton, A; King, B; Tang, S; Marklund, M (AIP Publishing, 20210507)