Per‐Olov Löwdin

Quantum Theory of Many-Particle Systems. I. Physical Interpretations by Means of Density Matrices, Natural Spin-Orbitals, and Convergence Problems in the Method of Configurational Interaction

Per‐Olov Löwdin · Physical Review · 1955 · 3.6K citations

Natural Sciences, Physics, Quantum Mechanics +14

On the Non-Orthogonality Problem Connected with the Use of Atomic Wave Functions in the Theory of Molecules and Crystals

Per‐Olov Löwdin · The Journal of Chemical Physics · 1950 · 3.2K citations

Natural Sciences, Chemistry, Physics +10

Quantum theory of cohesive properties of solids

Per‐Olov Löwdin · Advances In Physics · 1956 · 1.2K citations

Natural Sciences, Materials Science, Physics +14

Quantum Theory of Many-Particle Systems. III. Extension of the Hartree-Fock Scheme to Include Degenerate Systems and Correlation Effects

Per‐Olov Löwdin · Physical Review · 1955 · 1.1K citations

Natural Sciences, Physics, Complex Systems +16

A Note on the Quantum-Mechanical Perturbation Theory

Per‐Olov Löwdin · The Journal of Chemical Physics · 1951 · 948 citations

Natural Sciences, Physics, Mathematical Physics +16