Mrm. Witwit et Na. Gordon, CALCULATING ENERGY-LEVELS OF A DOUBLE-WELL POTENTIAL IN A 2-DIMENSIONAL SYSTEM BY EXPANDING THE POTENTIAL FUNCTION AROUND ITS MINIMUM, Canadian journal of physics, 75(10), 1997, pp. 705-714
Energy eigenvalues are obtained for a double-well potential V(x,y; Z(2
), lambda, a(xy)) = -Z(2)[x(2) + y(2)] + lambda[x(4) + 2a(xy)x(2)y(2)
+ y(4)], in a two-dimensional system, using the Hill-determinant appro
ach, for various values of perturbation parameters Z(2), lambda, and a
(xy). Some of the results calculated by the Hill-determinant approach
are compared with the results produced by other means.