3 papers
hep-th2025
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…
hep-th2025
On the late time behavior of thermal two point function in curved space-time
Dmitrii V. Diakonov, Gleb S. Zverev
We investigate the late-time behavior of the thermal two-point function for a Bose gas in a curved space-time with a Killing horizon. We demonstrate that the late-time behavior und…
hep-th2024
On (dis)agreement between different methods of calculation of the imaginary part of the effective action in expanding space-times
E. T. Akhmedov, I. A. Belkovich, D. V. Diakonov +1
We consider two approaches to calculate imaginary parts of effective actions in expanding space-times. While the first approach uses Bogolyubov coefficients, the second one uses th…