Journal of Hengyang Normal UniversityEvolution of the State of Disintegrating two-level Atom in the Electromagnetical FieldZhang DengPublished Jan 1, 2005• 0 citationsOpenAlexAbstractUsing a two-level atom as a quantum bit,We have figured the equation of density matrix evolution of the disintegrating two-level atomic system in the classic electromagnetcal field.As a result we get the evolution rule.