Resonant persistent currents for ultracold bosons on a lattice ring
Resonant persistent currents for ultracold bosons on a lattice ring
Persistent currents are studied for a one-dimensional bosonic gas in a ring lattice that has a SQUID-like geometry. While generically such currents are expected to be strongly suppressed in the Mott insulator phase, they show a pronounced resonant behavior when the barrier strength becomes of the order of the interparticle …