Abstract
Effective theories are widely used to describe low-energy behavior in situations where a full description including high-energy dynamics is either unavailable or excessively complicated. As a simple example, we obtain the effective quantum mechanics of the low-energy behavior of a Dirac electron in an attractive Coulomb potential. We use this effective theory to evaluate the hydrogen fine structure through terms of order mα6.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have