title: Exact quantum dynamics of a bosonic Josephson junction.
abstract: The quantum dynamics of a one-dimensional bosonic Josephson junction is studied by solving the time-dependent many-boson Schrödinger equation numerically exactly. Already for weak interparticle interactions and on short time scales, the commonly employed mean-field and many-body methods are found to deviate substantially from the exact dynamics. The system exhibits rich many-body dynamics such as enhanced tunneling and a novel equilibration phenomenon of the junction depending on the interaction, which is attributed to a quick loss of coherence.
authors.affiliation: Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany.
authors.forename: Kaspar
authors.initials: K
authors.lastname: Sakmann
authors.forename: Alexej I
authors.initials: AI
authors.lastname: Streltsov
authors.forename: Ofir E
authors.initials: OE
authors.lastname: Alon
authors.forename: Lorenz S
authors.initials: LS
authors.lastname: Cederbaum