Fig. 8: Surface energies.
From: Surface loss calculations and design of a superconducting transmon qubit with tapered wiring
Plot of the normalized surface energies Sa(cm)/K2 for ribbon (black) and \({S}_{a}({c}_{s})/K{^{\prime}}^{2}\) for coplanar (blue) geometries, versus the normalized distance (b − a)/a. The plot uses the normalized thickness a/t = 1000. The solid lines are for the metal surface with cm = 5.0, whereas dashes are for the substrate with cs = 1.6. Also plotted in red is \({S}_{a}/KK^{\prime}\) for the case of all capacitance coming from the ribbon or coplanar geometry.
