  We consider a two-dimensional self-bound quantum droplet, which consists of a
mixture of two Bose-Einstein condensates. We start with the ground state, and
then turn to the rotational response of this system, in the presence of an
external (harmonic) potential. We identify various phases, depending on the
atom number, the strength of the external confinement and the angular momentum.
These include center of mass excitation, ghost vortices, as well as vortices of
single and multiple quantization. According to our results, this is an
excellent system for the study of superfluid states.
