Local superfluid distillation of Bose liquids*

By introducing a localized resource theory of quantum coherence, we discuss limits to local distillation of complete superfluidity from imperfect superfluid states. To define the local maximal superfluid resource, we develop a theory of local superfluidity from first principles using local Galilei transformations, and demonstrate the framework in effective and microscopic models of Bose liquids. The combined theoretical framework of local superfluidity and localized resource theory of quantum coherence allows quantum information-based design and analyses of spatially structured superfluid quantum devices.