Dresden 2020 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 44: Quantum Chaos (joint session DY/TT)

TT 44.2: Talk

Wednesday, March 18, 2020, 15:30–15:45, HÜL 186

Corrected perturbation theory for transverse-electric whispering-gallery modes in deformed microdisks — •Manuel Badel and Jan Wiersig — Postfach 4120, D-39016 Magdeburg, Germany

The perturbation theory by Ge et al. [Phys. Rev. A 87, 023833 (2013)] for transverse-electric polarized modes in weakly deformed microdisks omits terms related to the variation of the normal derivative of the magnetic field along the boundary. We show that these terms are necessary to accurately describe microdisks with a strongly winding boundary. In particular, it is demonstrated that the corrected perturbation theory allows one to describe the counterintuitive phenomenon of Q-factor enhancement due to weak boundary deformation, examplified by the microflower cavity. Good agreement of the corrected perturbation theory with full numerical results is observed.