Teller 1937 + Yarkony 1996 conical-intersection: degeneracy-locus where adiabatic-states cross; basis of ultrafast non-adiabatic photochemistry + Berry-phase + funnel-dynamics.
Teller 1937 + Yarkony 1996 conical-intersection: degeneracy-locus where adiabatic-states cross; basis of ultrafast non-adiabatic photochemistry + Berry-phase + funnel-dynamics.