a model study of present-day Hall-effect circulators (vol 4, 5, 2017)

Since the publication of the original article [Placke et al. in EPJ Quantum Technol 4:5, 2017], one of the authors noticed a typographical error to equations (11a) and (11b) in their published article [Placke et al. in EPJ Quantum Technol 4:5, 2017]. The correct versions of (11a) and (11b) are included in this Correction article. Cmωm=1Z0Rc1−Z0Rc,Lmωm=Z0Rc1−Z0Rc,\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document} $$\begin{aligned} &C_{m}\omega_{m}= \frac{1}{\sqrt{Z_{0} R_{c}}} \sqrt{1 - \frac{Z_{0}}{R_{c}}} , \\ &L_{m}\omega_{m}= \sqrt{Z_{0} R_{c}} \sqrt{1 - \frac{Z_{0}}{R_{c}}}, \end{aligned}$$ \end{document}