A Wigner-Weyl perturbative expansion around momentum-dependent electronic states recovers exact coupled nuclear-electronic eigenvalues and improves model vibrational energies.
The effect of the breakdown of the Born-Oppenheimer approximation on the rotation-vibration Hamiltonian of a triatomic molecule
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Recovering Exact Vibrational Energies Within a Phase Space Electronic Structure Framework
A Wigner-Weyl perturbative expansion around momentum-dependent electronic states recovers exact coupled nuclear-electronic eigenvalues and improves model vibrational energies.