title: Magnetic-field quantum beats in two-photon free-induction decay.
abstract: Magnetic-field quantum beats are observed in Doppler-free two-photon free-induction decay. The 3S-4D transition in atomic sodium vapor is studied with fields up to 300 G. A strong dependence on the polarization of the excitation pulses is observed.
authors.forename: N P
authors.initials: NP
authors.lastname: Economou
authors.forename: P F
authors.initials: PF
authors.lastname: Liao