Physical Review ARealization of trapping in a two-level system with frequency-modulated fieldsG. S. Agarwal, Harshawardhan WanarePublished Dec 1, 1994• 86 citationsPublisherAbstractWe demonstrate the existence of population-trapping states in a two-level system driven by a frequency-modulated field. We present detailed numerical results on trapping and also on jumps in the system which occur when the energy levels cross.DOI10.1103/physreva.50.r4465