International Conference on Computational & Experimental Engineering and Sciences, 2023 openaire +1 more source
On the application of the Rayleigh–Ritz method to a projected Hamiltonian
Journal of Mathematical ChemistryWe apply the well known Rayleigh-Ritz method (RRM) to the projection of a Hamiltonian operator chosen recently for the extension of the variational principle to ensemble states. By means of a toy model we show that the RRM eigenvalues approach to those of the projected Hamiltonian from below.
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