Non-collinear spin structures are nanoscale exotic magnetic configurations in which the magnetic moment direction considerably varies between neighbouring atoms. These structures, including domain walls, vortices, skyrmions and hopfions, have attracted considerable research attention as promising candidates for storing information in energy-efficient memory and logic devices. These structures are stabilized by the competition between different magnetic interactions, which also play an important role in the formation in correlated quantum spin phases. However, non-collinear spin structures are typically treated in a classical description, since their characteristic length scales are often too large for quantum calculations in two or three dimensions. In the proposed doctoral project, numerical simulations and analytical models will be applied to reveal the properties of non-collinear spin structures when passing from the classical to the quantum limit. The quasiparticle excitations of magnetically ordered states called magnons establish a connection between the classical and quantum descriptions, and they will be used to study quantum correlations such as entanglement. The research is to be carried out using a computer simulation code developed at the institute. The project will provide the opportunity for collaboration with other experimental and theoretical groups within an international network.