title: Non-Markovian dynamics in a dense potassium vapor.
abstract: Transient four-wave mixing experiments on a dense potassium vapor, which has a dephasing time long compared to the collision duration, reveal distinct signatures of non-Markovian dynamics. Theoretical fits assuming stochastic fluctuation of the excited-state frequencies confirm that the two-time correlation function has a finite temporal width.
authors.affiliation: JILA, University of Colorado and National Institute of Standards and Technology, Boulder, 80309-0440, USA.
authors.forename: V O
authors.initials: VO
authors.lastname: Lorenz
authors.forename: S T
authors.initials: ST
authors.lastname: Cundiff