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hep-ex2026
A New Bound on Light-by-Light Scattering in the Low-Energy Regime
Aimé Matheron, Michal Šmíd, Felix Karbstein +76
The superposition principle at the heart of optics states that electromagnetic fields do not interact in vacuum. This principle is not universal, instead electromagnetic fields cou…
hep-ex2026
Dark-field Search for Quantum Vacuum Signals in the Low-Energy Regime
Aimé Matheron, Michal Šmíd, Felix Karbstein +52
We report on the experimental details of a dark-field search for light-by-light scattering signals performed at the High Energy Density (HED) instrument of the European XFEL (EuXFE…
hep-ex2025
The Darkfield Approach to Measuring Vacuum Birefringence and Light-by-Light Couplings -- A Proof-of-Principle Experiment
Michal Smíd, Pooyan Khademi, Carsten Bähtz +29
Vacuum fluctuations give rise to effective nonlinear interactions between electromagnetic fields. These generically modify the characteristics of light traversing a strong-field re…