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• W3104705478 abstract "We study the electron propagator in quantum electrodynamics in lower dimensions. In the case of free electrons, it is well known that the propagator in momentum space takes the simple form $S_F(p)=1/(gammacdot p-m)$. In the presence of external electromagnetic fields, electron asymptotic states are no longer plane-waves, and hence the propagator in the basis of momentum eigenstates has a more intricate form. Nevertheless, in the basis of the eigenfunctions of the operator $(gammacdot Pi)^2$, where $Pi_mu$ is the canonical momentum operator, it acquires the free form $S_F(p)=1/(gammacdot bar{p}-m)$ where $bar{p}_mu$ depends on the dynamical quantum numbers. We construct the electron propagator in the basis of the $(gammacdot Pi)^2$ eigenfunctions. In the (2+1)-dimensional case, we obtain it in an irreducible representation of the Clifford algebra incorporating to all orders the effects of a magnetic field of arbitrary spatial shape pointing perpendicularly to the plane of motion of the electrons. Such an exercise is of relevance in graphene in the massless limit. The specific examples considered include the uniform magnetic field and the exponentially damped static magnetic field. We further consider the electron propagator for the massive Schwinger model incorporating the effects of a constant electric field to all orders within this framework." @default.
• W3104705478 created "2020-11-23" @default.
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• W3104705478 date "2010-06-11" @default.
• W3104705478 modified "2023-10-12" @default.
• W3104705478 title "The electron propagator in external electromagnetic fields in low dimensions" @default.
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• W3104705478 doi "https://doi.org/10.1119/1.3311656" @default.
• W3104705478 hasPublicationYear "2010" @default.
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