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quant-ph2023
Self-adjointness of a simplified Dirac interaction operator without any cutoffs
Mads J. Damgaard
We show that a simplified version of the Dirac interaction operator given by $\hat H_\mathrm{I} \propto \int d\mathbf{k}d\mathbf{p}(\hat a(\mathbf{k}) + \hat a^\dagger(-\mathbf{k})…
quant-ph2017
Correction to the quantum phase operator for photons
Mads J. Damgaard
The vector potential operator, , is transformed and rewritten in terms of cosine and sine functions in order to get a clear picture of how the photon states re…