3 papers
hep-th2025
Casimir effect for scalar field rotating on a disk
M. Bordag, I. G. Pirozhenko
We compute the vacuum energy of a scalar field rotating with angular velocity on a disk of radius and with Dirichlet boundary conditions. The rotation is introduced by a m…
quant-ph2025
Casimir effect with an unstable mode
M. Bordag, I. G. Pirozhenko
We consider the Casimir effect in a (1+1)-dimensional model with a critical mode. Such a mode gives rise to a condensate described by the nonlinear Gross-Pitaevskii equation. In th…
gr-qc2024
Perturbations of classical fields by gravitational shockwaves
D. V. Fursaev, E. A. Davydov, I. G. Pirozhenko +1
Gravitational shockwaves are geometries where components of the transverse curvature have abrupt behaviour across null hypersurfaces, which are fronts of the waves. We develop a ge…