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arXiv · 1712.06401

Two-dimensional Yukawa interaction driven by a nonlocal-Proca quantum electrodynamics

Van Sérgio Alves·Tommaso Macrì·Gabriel C. Magalhães·E. C. Marino·Leandro O. Nascimento
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Abstract

We derive two versions of an effective model to describe dynamical effects of the Yukawa interaction among Dirac electrons in the plane. Such short-range interaction is obtained by introducing a mass term for the intermediate particle, which may be either scalar or an abelian gauge field, both of them in (3+1) dimensions. Thereafter, we consider that the matter field propagates only in (2+1) dimensions, whereas the bosonic field is free to propagate out of the plane. Within these assumptions, we apply a mechanism for dimensional reduction, which yields an effective model in (2+1) dimensions. In particular, for the gauge-field case, we use the Stueckelberg mechanism in order to preserve gauge invariance. We refer to this version as nonlocal-Proca quantum electrodynamics (NPQED). For both scalar and gauge cases, the effective models reproduce the usual $e^{-m r}/r$ Yukawa interaction in the static limit. By means of perturbation theory at one loop, we calculate the mass renormalization of the Dirac field. Our model is a generalization of Pseudoquantum electrodynamics (PQED), which is a gauge-field model that provides a Coulomb interaction for two-dimensional electrons. Possibilities of application to Fermi-Bose mixtures in mixed dimensions, using cold atoms, are briefly discussed.

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Van Sérgio Alves, Tommaso Macrì, Gabriel C. Magalhães, E. C. Marino, Leandro O. Nascimento. 2017-12-18. Two-dimensional Yukawa interaction driven by a nonlocal-Proca quantum electrodynamics. https://doi.org/10.1103/physrevd.97.096003

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