2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/34004Quantization of gravitational field in the neighbourhood of arbitrary nontrivial solution of Einstein equations is considered, the 2nd order of perturbation theory is calculated. The expression for quantum corrections of the field operator and explicit view of Hamiltonian are represented.10 pagesGeneral Relativity and Quantum Cosmologytext