FEM-QED FEM-based three-dimensional electrodynamic modeling approach to superconducting circuits and materials. Cavity with superconducting boundary conditions See cavity_with_sc_bounday.py. Within the cavity, $$ \nabla\times\nabla\times\mathbf{B} - \mu_{0}\epsilon_{0}\omega^{2} \mathbf{B} = 0 $$ Within the superconductor, $$ \nabla\times\nabla\times\mathbf{B} - \left( \mu_{0}\epsilon_{0}\omega^{2}-\frac{1}{\lambda_{L}^{2}} \right) \mathbf{B} = 0 $$ where $\lambda_{L}$ is the London penetration depth. At the outside boundary of the domain, Direchlet boundary conditions are applied, $$ \mathbf{n}\times\mathbf{B} = 0 $$
