Yurii Oleksiyovych Sitenko (Bogolyubov Institute for Theoretical Physics of NASU, Kyiv, Ukraine)

Theory of self-adjoint operators and quantum fermionic systems with topological defects

Topological defects appear as a consequence of spontaneous symmetry breaking in physical systems of various spatial dimensions. The method of a self-adjoint extension of symmetric operators is employed to impose a boundary condition for the quantized fermion field on the edge of the defect, and a general theory of quantum fermionic systems with topological defects is developed. The theory explains unusual quantum numbers which are induced in the Dirac monopole background at CP violation. The theory predicts the emergence of charge and other quantum numbers in graphytic monolayers with disclinations.