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Quantum vacuum processes in the extremely intense light of relativistic plasma mirror sources

Authors :
Antonin Sainte-Marie
Luca Fedeli
Neïl Zaïm
Felix Karbstein
Henri Vincenti
Source :
New Journal of Physics, Vol 24, Iss 6, p 065005 (2022)
Publication Year :
2022
Publisher :
IOP Publishing, 2022.

Abstract

The advent of petawatt-class laser systems allows generating electromagnetic fields of unprecedented strength in a controlled environment, driving increasingly more efforts to probe yet unobserved processes through their interaction with the quantum vacuum. Still, the lowest intensity scale governing these effects lies orders of magnitude beyond foreseen capabilities, so that such endeavor is expected to remain extremely challenging. In recent years, however, plasma mirrors have emerged as a promising bridge across this gap, by enabling the conversion of intense infrared laser pulses into coherently focused Doppler harmonic beams lying in the X-UV range. In this work, we present predictions on the quantum vacuum signatures produced when such beams are focused to intensities between 10 ^24 and 10 ^28 W cm ^−2 , specifically photon–photon scattering and electron–positron pair creation. These signatures are computed via the stimulated vacuum formalism, combined with a model of perfectly focused beam built from PIC-generated harmonics spectra, and implemented on state-of-the-art massively parallel numerical tools. In view of identifying experimentally favorable configurations, we also consider the coupling of the focused harmonic beam with an auxiliary optical beam, and provide comparison with other established schemes. Our results show that a single coherently focused harmonic beam can produce as much scattered photons as two infrared pulses in head-on collision, and confirm that the coupling of the harmonic beam to an auxiliary beam gives rise to significant levels of inelastic scattering, and hence holds the potential to strongly improve the attainable signal to noise ratios in experiments.

Details

Language :
English
ISSN :
13672630
Volume :
24
Issue :
6
Database :
Directory of Open Access Journals
Journal :
New Journal of Physics
Publication Type :
Academic Journal
Accession number :
edsdoj.fe2518a58d409d83fca1f499e10a1e
Document Type :
article
Full Text :
https://doi.org/10.1088/1367-2630/ac6f16