While this seems pretty magical, the biggest challenge will be inverting the Hamiltonian in the first place.
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While this seems pretty magical, the biggest challenge will be inverting the Hamiltonian in the first place. As we saw with the variational method, an example can be helpful in demonstrating the technique. Let’s just consider our familiar infinite square well, again setting its width a = 1 for simplicity. That is, the potential is
In the well, the Hamiltonian is of course exclusively kinetic energy:
in position space. To use this power method to find the ground state, we need to determine what the inverse of this Hamiltonian is; that is
or, what is the inverse of the momentum operator 1/pˆ ?
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Related Book For
Quantum Mechanics A Mathematical Introduction
ISBN: 9781009100502
1st Edition
Authors: Andrew J. Larkoski
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