Parity Violation and Electro-Weak Chemistry

In chapter 8, we abandoned radiative corrections of QED from our semi-classical theory for molecular science. This was justified by the fact that we aim at a theory that describes the energy and properties of molecular systems at ordinary (usually ambient) temperature. However, high-resolution molecular spectroscopy may very well aim at the detection of tiny effects in order to complete our picture of physical effects in molecular systems. Then, 

Probably one of the most appealing features of four-component methods is the possibility to test fundamental physical symmetries through accurate electronic structure calculations of molecules. First four omponent studies 

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