Quantum Spin Coherent Electron Correlation

1.1 Outline The central conceptual difficulty in standard non-relativistic quantum chemistry, as for relativistic quantum mechanics, remains that in the absence of a satisfactory, physically intelligible representation of the phenomenon of spin, spin is represented in our models as a topological constraint on many-particle interactions. All of chemistry is dominated by the phenomenon of spin-pairing, derived from the Aufbau principle of filling electron shells in atoms. However determinantal expression of antisymmetry requirements effectively maintains separation of same spin electrons (exchange effects) while degrading the details of coupling between opposing spin electrons to electrostatics. This chapter investigates quantum mechanically the implications of a semiclassical model of spin proposed and formally defended some time ago (Burton 1988; including a formal modification of coupled pair theory), extending my previous published conjectures (Burton 2009). Its simple new idea touches a vast area of contemporary physics and chemistry.