FIG. 2.

(a) Reduced potential as a function of the vesicle radius R. (b) Sketch of $\mathcal{R}$, given by Eq. (35), as a function of radius for both inside and outside of the vesicle. I and II refer to $\mathcal{R}>0$ and $\mathcal{R}<0$, respectively, to be distinguished in the WKB method.