Francisco M. Fernández

activity

20202026

most citedOn the Raleigh-Ritz variational method. Non-orthogonal basis set

7 citations · 7 across the 15 of their papers we have counts for

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Showing 2023Show all

3 papers · 1 filter

quant-ph2023

On the spectrum of the screened Coulomb potential $V (r) = - r^{- 1} e^{- C / r}$

Francisco M. Fernández

We analyse recent contradictory results and conclusions about the spectrum of the screened Coulomb potential $V (r) = - r^{- 1} e^{- C / r}$ . The well known Hellmann-Feynman theorem shows t…

quant-ph2023

On the variational treatment of a class of double-well oscillators

Francisco M. Fernández, Javier Garcia

We compare the well known Rayleigh-Ritz variational method (RRVM) with a recently proposed approach based on supersymmetric quantum mechanics and the Gram-Schmidt orthogonalization…

physics.class-ph2023

On the normal modes of coupled harmonic oscillators

Francisco M. Fernández

We discuss in detail a well known method for obtaining the frequencies of the normal modes of coupled harmonic oscillators that is based on the simultaneous diagonalization of two…

On the spectrum of the screened Coulomb potential V(r)=−r−1e−C/r

On the variational treatment of a class of double-well oscillators

On the normal modes of coupled harmonic oscillators

On the spectrum of the screened Coulomb potential $V (r) = - r^{- 1} e^{- C / r}$