title: Two-point phase correlations of a one-dimensional bosonic Josephson junction.
abstract: We realize a one-dimensional Josephson junction using quantum degenerate Bose gases in a tunable double well potential on an atom chip. Matter wave interferometry gives direct access to the relative phase field, which reflects the interplay of thermally driven fluctuations and phase locking due to tunneling. The thermal equilibrium state is characterized by probing the full statistical distribution function of the two-point phase correlation. Comparison to a stochastic model allows us to measure the coupling strength and temperature and hence a full characterization of the system.
authors.affiliation: Vienna Center for Quantum Science and Technology, Atominstitut, TU-Wien, 1020 Vienna, Austria.
authors.forename: T
authors.initials: T
authors.lastname: Betz
authors.forename: S
authors.initials: S
authors.lastname: Manz
authors.forename: R
authors.initials: R
authors.lastname: Bücker
authors.forename: T
authors.initials: T
authors.lastname: Berrada
authors.forename: Ch
authors.initials: Ch
authors.lastname: Koller
authors.forename: G
authors.initials: G
authors.lastname: Kazakov
authors.forename: I E
authors.initials: IE
authors.lastname: Mazets
authors.forename: H-P
authors.initials: HP
authors.lastname: Stimming
authors.forename: A
authors.initials: A
authors.lastname: Perrin
authors.forename: T
authors.initials: T
authors.lastname: Schumm
authors.forename: J
authors.initials: J
authors.lastname: Schmiedmayer