Oscillations and decay of superfluid currents in a one-dimensional Bose gas on a ring
We demonstrate coherent manipulation of the nuclear degrees of freedom of ultracold ground-state strontium-87 atoms, thus We study the time evolution of a supercurrent imprinted on a one-dimensional ring of interacting bosons in the presence of a defect created by a localized barrier.
arXiv:1903.09229 (2019) / Phys. Rev. Lett. 123, 195301 (2019)
Depending on interaction strength and temperature, we identify various dynamical regimes where the current oscillates, is self-trapped, or decays with time.
We show that the dynamics is captured by a dual Josephson model and involve phase slips of thermal or quantum nature.
