Quantum coherence in a superfluid Josephson junction.

Citation:

Narayana S, Sato Y. Quantum coherence in a superfluid Josephson junction. Phys Rev Lett 2011;106(5):055302.

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.