SAMOP 2023 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 71: Quantum Optics: Cavity and Waveguide QED III

Q 71.4: Vortrag

Freitag, 10. März 2023, 15:15–15:30, F442

Few-mode theory beyond the rotating-wave approximation — •Felix Riesterer, Lucas Weitzel, Dominik Lentrodt, and Andreas Buchleitner — Institute of Physics Albert-Ludwigs University of Freiburg Hermann-Herder-Str. 3 D-79104 Freiburg

For ideal cavities, the quantization of the electromagnetic field is rather simple. In real cavities with finite losses, however, the mode spectrum of the resonator becomes continuous, which makes the mathematical treatment numerically expensive and only possible with advanced techniques. It is then desirable to obtain a simplified description of the continuum, to model the field and quantum dynamics in open cavities. To overcome this problem, one uses projections to an equivalent system which is analog to the Jaynes-Cummings model coupled to an external heat bath, which can then be treated with the Lindblad formalism. In this process, the so-called rotating wave approximation has to be applied, where counter-rotating terms are omitted. In this work, we consider a generalized system-bath model by adding the counter-rotating terms to the commonly considered Hamiltonian. Our approach is aimed at understanding how these models can be applied or generalized for complex resonators with large losses, as they are encountered, e.g., in plasmonic cavities.