Title: Effects of quantum fluctuations on superfluidity

Abstract:
Ultracold atoms offer a fascinating playground for exploring quantum mechanics, with implication for everything from precision measurements to quantum computing. One exciting development in this field is the use of quantum fluctuations to stabilize Bose-Bose mixtures against collapse, as first proposed by Petrov. These fluctuations, which are typically negligible in mean field treatments, can have significant impact under the right conditions.

This pioneering work has opened up new directions in ultracold atomic research, leading to experimental observations of self-bound bosonic droplets in two component systems and explaining the surprising observation of dipolar droplets, as well as the discovery of the exotic state known as a supersolid, which combines superfluidity with crystalline structure.

In this talk, I will discuss recent theoretical work from Stephanie Reimann's group during my PhD-studies on the effects of quantum fluctuations on superfluid properties in a variety of systems.

Specifically, I will cover topics such as the generation of vortices in droplets, asymmetry effects on the droplet phase and the effect of quantum fluctuations on the miscible-immiscible phase transition in contact Bose-Bose mixtures, as well as the formation of dipolar supersolids on a ring.