Spin hedgehog and collective magnetic quadrupole moments induced by parity and time invariance violating interaction

Abstract

P- and T-odd interaction produces a spin distribution with the spins directed along the radius in spherically symmetric quantum systems. Due to the spin-dependent strong interaction this spin hedgehog contributes to P- and T-odd effects in neutron scattering, nuclear moments, etc. In deformed nuclei the P- and T-odd interaction produces a collective magnetic quadrupole moment. This moment induces P- and T -violating effects in atoms and molecules.