3 papers
physics.gen-ph2023
How the perturbed vacuum might be completely decoupled from all physical states, allowing for a well-defined Hamiltonian formulation of QED
Mads J. Damgaard
We carry out a Dirac sea reinterpretation of a discretized version of the Hamiltonian of quantum electrodynamics (QED), and analyze the perturbed vacuum in the continuum limit. We…
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…