42.50.Dv Quantum state engineering and measurements (see also 03.65.Ud Entanglement and quantum nonlocality, e.g., EPR paradox, Bells inequalities, GHZ states, etc.)
42.50.Ex Optical implementations of quantum information processing and transfer
42.50.Hz Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift (for multiphoton ionization and excitation of atoms and molecules, see 32.80.Rm, and 33.80.Rv, respectively)
42.50.Lc Quantum fluctuations, quantum noise, and quantum jumps
42.50.Md Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency; Dynamics of nonlinear optical systems; optical instabilities, optical chaos, and optical spatio-tempor
42.50.Nn Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems
42.50.Tx Optical angular momentum and its quantum aspects (see also 42.25.Ja Polarization); Mechanical effects of light on atoms, molecules, and ions, see 37.10.Vz
42.50.Wk Mechanical effects of light on material media, microstructures and particles (see also 87.80.Cc Optical trapping in biology and medicine); Experimental tests in quantum electrodynamics, see 12.20.Fv; Measurements theory in quantum mechanics, see 03.65.Ta