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Q: Fachverband Quantenoptik und Photonik
Q 38: Quantum Effects (QED) I
Q 38.1: Vortrag
Mittwoch, 11. März 2020, 14:00–14:15, f442
Optical Signatures of Quantum Vacuum Nonlinearities in the Strong Field Regime — •Leonhard Klar1,2, Felix Karbstein1,2, and Holger Gies1,2 — 1Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany — 2Helmholtz-Institut Jena, 07743 Jena, Germany
Quantum electrodynamics (QED) is the most precisely tested quantum field theory. Nevertheless, particularly in the high-intensity regime it predicts various phenomena, that so far have not been directly accessible in experiments, such as light-by-light scattering phenomena induced by quantum vacuum fluctuations. Our focus is on all-optical signatures of quantum vacuum effects which can be probed in high-intensity laser experiments with state-of-the-art technology. More specifically, we aim at identifying experimentally viable scenarios where the signal photons encoding the signature of QED vacuum nonlinearity can be distinguished from the large background of the driving laser photons.
We present a promising setup allowing to find signal photons discernible from the background. To this end, we envision the collision of several tightly focused high-intensity laser beams, which are assumed to be generated by two lasers and suitable frequency doubling, and identify a superposition scheme of these lasers that induces prominent signal properties. A key mechanism consists in producing a narrow scattering center. We calculate the differential number of signal photons attainable in this field configuration analytically.