A Simple Variational Formula in Quantum
- 1 September 1973
- journal article
- Published by American Association of Physics Teachers (AAPT) in American Journal of Physics
- Vol. 41 (9) , 1081-1083
- https://doi.org/10.1119/1.1987476
Abstract
If one assumes that the change in a ground-state wave function produced by a perturbing potential V is proportional to V, a general and very simple formula for the perturbation in energy results. The formula is illustrated with two examples.Keywords
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