Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 11: Quantum Optics I
Q 11.8: Talk
Monday, March 9, 2020, 15:45–16:00, f342
Signatures of photon-photon scattering in Hermite-Gaussian beams — •Ricardo R.Q.P.T. Oude Weernink1,2 and Felix Karbstein1,2 — 1Helmholtz-Institut Jena, 07743 Jena, Germany — 2Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
Quantum electrodynamics predicts effective nonlinear interactions between electromagnetic fields mediated by quantum vacuum fluctuations, a prominent example being photon-photon scattering. Measuring this process directly in an experiment is a difficult endeavour and has yet to be achieved. One of the toughest challenges for any experimental approach is to find scenarios allowing for a clear signal-to-background separation.
In this talk we present the following set-up: We focus on the geometrically simple scenario of two counter-propagating high-intensity laser beams, though allow them to be prepared in arbitrary Hermite-Gaussian modes or superpositions thereof. We are mainly interested in ways to enhance the discernible signal, but also study the behaviour of the signal photon number for non-optimal collisions with finite impact parameter.