Quantum Mechanics and Its Evolving Formulations

Abstract

In this paper, we discuss the time evolution of the quantum mechanics formalism. Starting from the heroic beginnings of Heisenberg and Schrödinger, we cover successively the rigorous Hilbert space formulation of von Neumann, the practical bra-ket formalism of Dirac, and the more recent rigged Hilbert space approach.

Keywords

• quantum mechanics
• von Neumann
• bra-ket formalism
• rigged Hilbert space