Question: Two identical spin-zero bosons are placed in an infinite square well (Equation 2.22). They interact weakly with one another, via the potential (where V 0

Two identical spin-zero bosons are placed in an infinite square well (Equation 2.22). They interact weakly with one another, via the potential

(where V₀ is a constant with the dimensions of energy, and a is the width of the well).
(a) First, ignoring the interaction between the particles, find the ground state and the first excited state—both the wave functions and the associated energies.
(b) Use first-order perturbation theory to estimate the effect of the particle– particle interaction on the energies of the ground state and the first excited state.

V(x1, x2) = -a Vod(x1 - x2)

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