title: Robust Asymptotic Entanglement under Multipartite Collective Dephasing.
abstract: We derive an analytic solution for the ensemble-averaged collective dephasing dynamics of N noninteracting atoms in a fluctuating homogeneous external field. The obtained Kraus map is used to specify families of states whose entanglement properties are preserved at all times under arbitrary field orientations, even for states undergoing incoherent evolution. Our results apply to arbitrary spectral distributions of the field fluctuations.
authors.affiliation: Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany.|Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom.
authors.forename: Edoardo G
authors.initials: EG
authors.lastname: Carnio
authors.affiliation: Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany.|Freiburg Institute for Advanced Studies, Albert-Ludwigs-Universität Freiburg, Albertstraße 19, 79104 Freiburg, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Buchleitner
authors.affiliation: Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany.
authors.forename: Manuel
authors.initials: M
authors.lastname: Gessner