4 papers
Surprises of Klein paradox
T. R. Ahmadov, E. T. Akhmedov, V. I. Lapushkin
We consider second quantized dimensional Dirac fermions with mass in background electric fields. This theory mimics the following situations. We consider two parallel cap…
Lessons from the Klein paradox
E. T. Akhmedov, D. V. Diakonov, V. I. Lapushkin +1
We re-examine the Klein paradox from a many-particle perspective in quantum field theory. Specifically, we compute the expectation value of the particle current induced by a suffic…
Simplification of nonlinear equations for a field operator
V. I. Lapushkin
In this paper, we study different properties of the motion equations of interacting fields. In the second section, we prove that "Wightman's" fields (we use only a subset of Wightm…
Light fields in various patches of de Sitter space-time
E. T. Akhmedov, V. I. Lapushkin, D. I. Sadekov
We start with the consideration of the loop effects for light fields with non-zero mass in the expanding Poincaré patch of de Sitter space-time. We derive the Dyson-Schwinger equat…