p^·A^ vs x^·E^ : Gauge invariance in quantum optics and quantum field theory
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DOI: 10.1103/physrevd.99.065014
Abstract: We compare the predictions of the fundamentally motivated minimal coupling ($\hat{\boldsymbol{p}}\cdot\hat{\boldsymbol{A}}$) and the ubiquitous dipole coupling ($\hat{\boldsymbol{x}}\cdot\hat{\boldsymbol{E}}$) in the light-matter interaction. By studying the light-matter interaction for hydrogen-like atoms we find that the dipole approximation… read more here.
Keywords: gauge invariance; invariance quantum; hat boldsymbol; quantum optics ... See more keywords