%0 Journal Article
%T Non-equilibrium steady-states in a driven-dissipative superfluid
%A Ralf Labouvie
%A Bodhaditya Santra
%A Simon Heun
%A Herwig Ott
%J Physics
%D 2015
%I arXiv
%X We experimentally study a driven-dissipative Josephson junction array, realized with a weakly interacting Bose Einstein condensate residing in a one-dimensional optical lattice. Engineered losses on one site act as a local dissipative process, while tunneling from the neighboring sites constitutes the driving force. We characterize the emerging steady-states of this atomtronic device. With increasing dissipation strength $\gamma$ the system crosses from a superfluid state, characterized by a coherent Josephson current into the lossy site to a resistive state, characterized by an incoherent hopping transport. For intermediate values of $\gamma$, the system exhibits bistability, where a superfluid and a resistive branch coexist. We also study the relaxation dynamics towards the steady-state, where we find a critical slowing down, indicating the presence of a non-equilibrium phase transition.
%U http://arxiv.org/abs/1507.05007v1