title: Implications of SU(2) symmetry on the dynamics of population difference in the two-component atomic vapor.
abstract: We present an exact many-body solution for the dynamics of the population difference N2-N1 induced by an rf field in the two-component atomic cloud characterized by equal scattering lengths. We show that no intrinsic decoherence occurs for N2-N1, provided that the exact intrinsic SU(2) symmetry holds. Decoherence for N2-N1 arises when deviations from the symmetry exist either in the scattering lengths or in the confining potentials. We suggest testing the evolution of N2-N1 by conducting echo-type experiments.
authors.affiliation: Department of Engineering Science and Physics, The College of Staten Island, CUNY, Staten Island, New York 10314, USA.
authors.forename: A B
authors.initials: AB
authors.lastname: Kuklov
authors.forename: J L
authors.initials: JL
authors.lastname: Birman