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• W1992912202 abstract "We define Sturmian basis functions for the harmonic oscillator and investigate whether recent insights into Sturmians for Coulomb-like potentials can be extended to this important potential. We also treat many body problems such as coupling to a bath of harmonic oscillators. Comments on coupled oscillators and time-dependent potentials are also made. It is argued that the Sturmian method amounts to a non-perturbative calculation of the energy levels, but the limitations of the method is also pointed out, and the cause of this limitation is found to be related to the divergence of the potential. Thus the divergent nature of the anharmonic potential leads to the Sturmian method being less acurate than in the Coulomb case. We discuss how modified anharmonic oscillator potentials, which are well behaved at infinity, leads to a rapidly converging Sturmian approximation." @default.
• W1992912202 created "2016-06-24" @default.
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• W1992912202 date "1999-08-01" @default.
• W1992912202 modified "2023-10-02" @default.
• W1992912202 title "Sturmian basis functions for the harmonic oscillator" @default.
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• W1992912202 doi "https://doi.org/10.1103/physreva.60.812" @default.
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