Mainz 2026 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 79: Cavity QED and QED III
Q 79.3: Vortrag
Freitag, 6. März 2026, 15:00–15:15, P 4
Quantum metasurfaces as probes of vacuum particle content — •Germain Tobar1, Joshua Foo2, Sofia Qvarfort3, Fabio Costa3, Rivka Bekenstein4, and Magdalena Zych1 — 1Department of Physics, Stockholm University, SE-106 91 Stockholm, Sweden — 2Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1 — 3Nordita, KTH Royal Institute of Technology and Stockholm University, Hannes Alfvens vag 12, SE-114 19 Stockholm, Sweden — 4Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
The quantum vacuum of the electromagnetic field contains spatially localised particle content. We propose to probe this content in the non-perturbative regime of boundary-condition changes using a quantum mirror - a two-dimensional sub-wavelength atomic array dividing a photonic cavity. Its reflectivity is quantum-controlled by a single Rydberg atom, creating coherent superpositions of transmissive and reflective states. Unlike parametric dynamical-Casimir approaches, this platform enables boundary changes that non-perturbatively alter the cavity-mode structure, directly coupling to the particle content of the vacuum. This opens an experimental route to observing superposed Dirchtlet boundary conditions, superpositions of particle creation effects and the dynamical casimir effect with highly non-perturbative boundary condition changes.
Keywords: Cavity QED; Rydberg physics; Quantum Optics; Dynamical Casimir Effect