A novel finite element method provides the first explicit two-sided eigenvalue bounds for Schrödinger operators with singular potentials on unbounded domains, demonstrated on hydrogen and H2+ systems.
Goerisch , Ein stufenverfahren zur berechnung von eigenwertschranken , ISNM International Series of Numerical Mathematics, 83 (1987), pp
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Explicit Two-Sided Eigenvalue Bounds for Schr\"odinger Operators with Singular Potentials via Finite Element Method
A novel finite element method provides the first explicit two-sided eigenvalue bounds for Schrödinger operators with singular potentials on unbounded domains, demonstrated on hydrogen and H2+ systems.