title: Quantum coherence in a superfluid Josephson junction.
abstract: We report a new kind of experiment in which we take an array of nanoscale apertures that form a superfluid (4)He Josephson junction and apply quantum phase gradients directly along the array. We observe collective coherent behaviors from aperture elements, leading to quantum interference. Connections to superconducting and Bose-Einstein condensate Josephson junctions as well as phase coherence among the superfluid aperture array are discussed.
authors.affiliation: The Rowland Institute at Harvard, Harvard University, Cambridge, Massachusetts 02142, USA.
authors.forename: Supradeep
authors.initials: S
authors.lastname: Narayana
authors.forename: Yuki
authors.initials: Y
authors.lastname: Sato