A complex scalar field coupled to a planar delta potential through its Klein-Gordon current shows no single-charge interaction, modifies opposite-side two-charge interactions, and yields MIT-like boundary conditions as the coupling tends to infinity.
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The role of scalar current coupling along surfaces
A complex scalar field coupled to a planar delta potential through its Klein-Gordon current shows no single-charge interaction, modifies opposite-side two-charge interactions, and yields MIT-like boundary conditions as the coupling tends to infinity.