Two Applications of the Variational Method to Quantum Mechanics
Two Applications of the Variational Method to Quantum Mechanics is a scholarly work, published in 1947 in ''Physical Review''. The main subjects of the publication include ground state, quantum, classical mechanics, wave function, physics, quantum electrodynamics, Variational method, perturbation theory, bound state, quantum mechanics, Non-Hermitian quantum mechanics, numerical linear algebra, Schrödinger equation, and perturbation. A minimum property of the sum of the $n$ lowest proper values is utilized in a new method for obtaining higher proper values and functions.