2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/107051Comparing the results of exact quantum calculations and those obtained from the EBK-like quantization scheme of Silvestrov et al [Phys. Rev. Lett. 90, 116801 (2003)] we show that the spectrum of Andreev billiards of mixed phase space can basically be decomposed into a regular and an irregular part, similarly to normal billiards. We provide the first numerical confirmation of the validity of this quantization scheme for individual eigenstates and discuss its accuracy.4 pages, 2 figuresMesoscale and Nanoscale PhysicsSuperconductivitytext