Consider a particle confined in a two dimensional square well with faces at x=0,a;y=0,a. The doubly degenerate eigenstates appear as Psinp=(2/a)sin(n(pi)x/a)sin(p(pi)x/a)(adsbygoogle = window.adsbygoogle || []).push({});

Enp=E1(n^2 + p^2)

What do these energies become under perturbation H'=10^-3E1sin((pi)x/a)?

Help anyone? No idea how to solve this.

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# Tough Perturbation Question (At least for me)

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