Directions in the theory of resonance-radiation pressure

A number of recent developments in the theory of atomic motion in resonant radiation are explained and discussed. Specific topics covered include: (i) the spontaneous radiation force; (ii) the anomalous radiation force on an inverted atomic transition; (iii) trapping of atoms by the dipole force; (iv) cooling by the dissipative force in a below-resonance standing wave; and (v) the optical Stern-Gerlach effect. In addition, it is shown how quantum fluctuations of the resonance-radiation force limit the temperature achievable by radiation cooling and limit the confinement time for an atom in a radiation trap. (author)