Within the Hartree atomic unit systems, the Schrödinger equation becomes parameter free. But there’s more to it than making a student’s life easier, as Gordon Drake and Eite Tiesinga recount.
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Drake, G.W.F., Tiesinga, E. Simplify your life. Nat. Phys. 16, 1242 (2020). https://doi.org/10.1038/s41567-020-01095-x
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DOI: https://doi.org/10.1038/s41567-020-01095-x
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