Stiefel and Grassmann manifolds in Quantum Chemistry

Abstract

We establish geometric properties of Stiefel and Grassmann manifolds which arise in relation to Slater type variational spaces in many-particle Hartree-Fock theory and beyond. In particular, we prove that they are analytic homogeneous spaces and submanifolds of the space of bounded operators on the single-particle Hilbert space. As a by-product we obtain that they are complete Finsler manifolds. These geometric properties underpin state-of-the-art results on existence of solutions to Hartree-Fock type equations.

23 pages

Cited by in corpus (6)

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• Geometry and symmetry of quantum and classical-quantum variational principles
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• The group of L^2 isometries on H^1_0
• The compatible Grassmannian