Vacuum high-harmonic generation in the shock regime

Böhl, P.; King, B.; Rühl, H.

doi:10.1103/physreva.92.032115

Cited by 33 publications

(50 citation statements)

References 90 publications

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“…where Spin(0) denotes the part of the spin term (16) which is independent of a µ . The equivalence of (20) and (19) can be shown explicitly by separating Spin(a) into field-dependent and independent pieces, integrating by parts, and using the definition of the kinetic momentum (1).…”

Section: A Regularisation and Gauge Invariancementioning

confidence: 99%

Absorption cross section in an intense plane wave background

2019

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We consider the absorption of probe photons by electrons in the presence of an intense, pulsed, background field. Our analysis reveals an interplay between regularisation and gauge invariance which distinguishes absorption from its crossing-symmetric processes, as well as a physical interpretation of absorption in terms of degenerate processes in the weak field limit. In the strong field limit we develop a locally constant field approximation (LCFA) for absorption which also exhibits new features. We benchmark the LCFA against exact analytical calculations and explore its regime of validity. Pulse shape effects are also investigated, as well as infra-red and collinear limits of the absorption process.

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Section: A Regularisation and Gauge Invariancementioning

confidence: 99%

Absorption cross section in an intense plane wave background

2019

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“…In Ref. [36], the wave steepening is demonstrated by numerical inte-gration of nonlinear QED vacuum electrodynamics equations.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic shocks in the quantum vacuum

2019

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The interaction of two counter-propagating electromagnetic waves in a vacuum is analyzed within the framework of the Heisenberg-Euler formalism in quantum electrodynamics. The nonlinear electromagnetic wave in the quantum vacuum is characterized by wave steepening, subsequent generation of high order harmonics and electromagnetic shock wave formation with electron-positron pair generation at the shock wave front.

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“…While already actively being searched for in experiments using macroscopic magnetic fields in combination with continuous-wave lasers and high-finesse cavities [23][24][25], various recent theoretical studies have emphasized the possibility of its verification in an all-optical experiment, colliding an X-ray [26][27][28][29][30][31] or gamma-ray probe [32][33][34][35][36] with a high-intensity laser pulse. Other theoretical proposals have focused, e.g., on vacuum nonlinearity induced photon scattering phenomena in laser pulse collisions [37][38][39][40][41], interference effects [42][43][44], laser mode self-mixing [45], quantum reflection [46], higher-harmonic generation in an electromagnetized vacuum [47][48][49][50][51][52][53][54], photon splitting [21,22,[55][56][57][58][59][60][61] and photon merging [62][63][64][65].…”

Section: Introductionmentioning

confidence: 99%

Photon-photon scattering at the high-intensity frontier

et al. 2018

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The tremendous progress in high-intensity laser technology and the establishment of dedicated high-field laboratories in recent years have paved the way towards a first observation of quantum vacuum nonlinearities at the high-intensity frontier. We advocate a particularly prospective scenario, where three synchronized high-intensity laser pulses are brought into collision, giving rise to signal photons, whose frequency and propagation direction differ from the driving laser pulses, thus providing various means to achieve an excellent signal to background separation. Based on the theoretical concept of vacuum emission, we employ an efficient numerical algorithm which allows us to model the collision of focused high-intensity laser pulses in unprecedented detail. We provide accurate predictions for the numbers of signal photons accessible in experiment. Our study is the first to predict the precise angular spread of the signal photons, and paves the way for a first verification of quantum vacuum nonlinearity in a well-controlled laboratory experiment at one of the many high-intensity laser facilities currently coming online.

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Vacuum high-harmonic generation in the shock regime

Cited by 33 publications

References 90 publications

Absorption cross section in an intense plane wave background

Absorption cross section in an intense plane wave background

Electromagnetic shocks in the quantum vacuum

Photon-photon scattering at the high-intensity frontier

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