Perturbation theory without wavefunctions

Coupling constant analyticity for the anharmonic oscillator

Barry Simon, Arnold A. Dicke · Annals of Physics · 1970 · 704 citations

Natural Sciences, Mathematics, Physics +8

Pade approximants and the anharmonic oscillator

J. J. Loeffel, A. Martin, Barry Simon et al. · Physics Letters B · 1969 · 248 citations · Full text

Natural Sciences, Mathematics, Physics +9

Quantum-mechanical perturbation theory

J Killingbeck · Reports on Progress in Physics · 1977 · 161 citations

Natural Sciences, Mathematics, Physics +13

Hypervirial and Hellmann-Feynman Theorems Applied to Anharmonic Oscillators

Robert J. Swenson, Scott Danforth · The Journal of Chemical Physics · 1972 · 143 citations

Natural Sciences, Mathematics, Physics +9