R. Lemus et al., ACCIDENTAL DEGENERACY AND HIDDEN SYMMETRY - RECTANGULAR WELLS WITH COMMENSURATE SIDES, American journal of physics, 66(7), 1998, pp. 629-631
Two-dimensional quantum square wells and rectangular billiards with co
mmensurate sides are simple systems which exhibit accidental degenerac
ies. We show that a recent analysis for square wells can be similarly
applied to rectangular wells with commensurate sides. (C) 1998 America
n Association of Physics Teachers.