  We study the transport properties of low-energy (quasi)particles
ballistically traversing normal and Andreev two-dimensional open cavities with
a Sinai-billiard shape. We consider four different geometrical setups and focus
on the dependence of transport on the strength of an applied magnetic field. By
solving the classical equations of motion for each setup we calculate the
magnetoconductance in terms of transmission and reflection coefficients for
both the normal and Andreev versions of the billiard, calculating in the latter
the critical field value above which the outgoing current of holes becomes
zero.
