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Renormalized perturbation theory in an intense background electromagnetic field
Misha A. Lopez-Lopez, Giulio Audagnotto, Antonino Di Piazza
Quantum electrodynamics in strong background electromagnetic fields or strong-field QED (SFQED) has been investigated in great detail at the tree level. The study of SFQED at highe…
Enhancement of nonlinear pair production in a flying-focus pulse
Md Reshad Ur Rahman, Martin S. Formanek, Elias Gerstmayr +3
A photon can decay into an electron-positron pair in the presence of an intense laser pulse by a process known as nonlinear Breit-Wheeler pair production (NBWPP). For a sufficientl…
Infrared behavior of the photon yield in nonlinear Compton scattering
Antonino Di Piazza, Giulio Audagnotto
Nonlinear Compton scattering is the process of emission of a single photon by a charge driven by an intense laser field. Here, we study the infrared behavior of the photon yield em…
Intrinsic Nonlocality of Spin- and Polarization-Resolved Probabilities in Strong-Field Quantum Electrodynamics
Samuele Montefiori, Antonino Di Piazza, Tobias Podszus +2
Spin and polarization are central to precision tests of fundamental physics and for interpreting radiation from astrophysical sources and ultraintense laser-matter experiments. Her…
Observation of quantum effects on radiation reaction in strong fields
Eva E. Los, Elias Gerstmayr, Christopher Arran +28
Radiation reaction, the force experienced by an accelerated charge due to radiation emission, has long been the subject of extensive theoretical and experimental research. Experime…
Signatures of vacuum birefringence in low-power flying focus pulses
Martin Formanek, John P. Palastro, Dillon Ramsey +2
Vacuum birefringence produces a differential phase between orthogonally polarized components of a weak electromagnetic probe in the presence of a strong electromagnetic field. Desp…
Emission of twisted photons by a scalar charged particle in a strong magnetic field
D. Karlovets, A. Di Piazza
We consider the emission of a photon by a scalar charged particle in a constant and uniform magnetic field. In contrast to the conventional approach with both photon and outgoing c…
Proportionality of gravitational and electromagnetic radiation by an electron in an intense plane wave
G. Audagnotto, C. H. Keitel, A. Di Piazza
Accelerated charges emit both electromagnetic and gravitational radiation. Classically, it was found that the electromagnetic energy spectrum radiated by an electron in a monochrom…
Nonlinear Compton scattering and nonlinear Breit-Wheeler pair production including the damping of particle states
Tobias Podszus, Victor Dinu, Antonino Di Piazza
In the presence of an electromagnetic background plane-wave field, electron, positron, and photon states are not stable, because electrons and positrons emit photons and photons de…
Stimulated vacuum emission and photon absorption in strong electromagnetic fields
I. A. Aleksandrov, A. Di Piazza, G. Plunien +1
According to quantum electrodynamics (QED), a strong external field can make the vacuum state decay producing electron-positron pairs. Here we investigate emission of soft photons…
Quasiclassical representation of the Volkov propagator and the tadpole diagram in a plane wave
A. Di Piazza, F. P. Fronimos
The solution of the Dirac equation in the presence of an arbitrary plane wave, corresponding to the so-called Volkov states, has provided an enormous insight in strong-field QED. I…
Radiation Reaction Enhancement in Flying Focus Pulses
Martin Formanek, Dillon Ramsey, John P. Palastro +1
Radiation reaction (RR) is the oldest still-unsolved problem in electrodynamics. In addition to conceptual difficulties in its theoretical formulation, the requirement of exceeding…
WKB Electron Wave Functions in a Tightly Focused Laser Beam
A. Di Piazza
Available laser technology is opening the possibility of testing QED experimentally in the so-called strong-field regime. This calls for developing theoretical tools to investigate…
Implementing nonlinear Compton scattering beyond the local constant field approximation
A. Di Piazza, M. Tamburini, S. Meuren +1
In the calculation of probabilities of physical processes occurring in a background classical field, the local constant field approximation (LCFA) relies on the possibility of negl…
High-Energy Vacuum Birefringence and Dichroism in an Ultrastrong Laser Field
Sergey Bragin, Sebastian Meuren, Christoph H. Keitel +1
A long-standing prediction of quantum electrodynamics, yet to be experimentally observed, is the interaction between real photons in vacuum. As a consequence of this interaction, t…
First-order strong-field QED processes in a tightly focused laser beam
A. Di Piazza
In [Phys. Rev. Lett. \textbf{117}, 213201 (2016)] we have determined the angular resolved and the total energy spectrum of a positron produced via nonlinear Breit-Wheeler pair prod…
Nonlinear Breit-Wheeler pair production in a tightly focused laser beam
A. Di Piazza
The only available analytical framework for investigating QED processes in a strong laser field systematically relies on approximating the latter as a plane wave. However, realisti…
Nonlinear single Compton scattering of an electron wave-packet
A. Angioi, F. Mackenroth, A. Di Piazza
Nonlinear single Compton scattering has been thoroughly investigated in the literature under the assumption that initially the electron has a definite momentum. Here, we study a mo…
Semiclassical picture for electron-positron photoproduction in strong laser fields
Sebastian Meuren, Christoph H. Keitel, Antonino Di Piazza
The nonlinear Breit-Wheeler process is studied in the presence of strong and short laser pulses. We show that for a relativistically intense plane-wave laser field many features of…
High-Energy Recollision Processes of Laser-Generated Electron-Positron Pairs
Sebastian Meuren, Karen Z. Hatsagortsyan, Christoph H. Keitel +1
Two oppositely charged particles created within a microscopic space-time region can be separated, accelerated over a much larger distance, and brought to a recollision by a laser f…
Polarization operator approach to pair creation in short laser pulses
Sebastian Meuren, Karen Z. Hatsagortsyan, Christoph H. Keitel +1
Short-pulse effects are investigated for the nonlinear Breit-Wheeler process, i.e. the production of an electron-positron pair induced by a gamma photon inside an intense plane-wav…
Ultrarelativistic quasiclassical wave functions in strong laser and atomic fields
A. Di Piazza, A. I. Milstein
The problem of an ultrarelativistic charge in the presence of an atomic and a plane-wave field is investigated in the quasiclassical regime by including exactly the effects of both…
Electron-beam dynamics in a strong laser field including quantum radiation reaction
Norman Neitz, Antonino Di Piazza
The evolution of an electron beam colliding head-on with a strong plane-wave field is investigated in the framework of strong-field QED including radiation-reaction effects due to…
Novel aspects of radiation reaction in the classical and the quantum regime
Norman Neitz, Naveen Kumar, Felix Mackenroth +3
This work is dedicated to the study of radiation reaction signatures in the framework of classical and quantum electrodynamics. Since there has been no distinct experimental valida…