Pertubation Theory

Pertubation Theory lets you approximate the eigenvalues and eigenvectors of a particularly difficult Hamiltonian. However, we must be able to express the Hamiltonian we would like to solve (H) as the sum of another Hamiltonian with a known solution (H0), and a small pertubation (V').

Example: 1-D Infinite Square Well with Constant Pertubation

The Hamiltonian of this system is just the Infinite Square Well Hamiltonian, with an added constant potential.

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