  Several experimental groups reported the evidence of multiple periodic
modulations of nuclear decay constants which amplitudes are of the order .1%
and periods of one year, 24 hours or about one month. We argue that such
deviations from radioactive decay law can be described in nonlinear quantum
mechanics framework, in which decay process obeys to nonlinear Shroedinger
equation with Doebner-Goldin terms. Proposed corrections to Hamiltonian of
quantum system interaction with gravitation field correspond to some emergent
gravity theories, in particular, bilocal gravity model. Decay parameter
variations under influence of Sun gravity, calculated in our model, agree well
with experimental results for alpha-decay life-time oscillations of Polonium
isotopes
