  Vortex reconnections plays an important role in the turbulent flows
associated with the superfluids. To understand the dynamics, we examine the
reconnections of vortex rings in the superfluids of dilute atomic gases
confined in trapping potentials using Gross-Petaevskii equation. Furthermore we
study the reconnection dynamics of coreless vortex rings, where one of the
species can act as a tracer.
