Wolf von Klitzing (FORTH) invited talk at FINESS 2022

Title: Manipulating matterwaves in atomtronic waveguides

Wolf von Klitzing

Abstract

Matterwaves are the atomic counterpart to photonic waves. Like light, they can be guided, focussed and expanded. Time-averaged Adiabatic Potentials (TAAPs) allow us to construct the first fully coherent waveguides for matterwave, where we propagate atoms over distances of tens of centimeters without any noticeable losses or heating from the waveguides. These compact devices now opened the possibility to perform extremely low energy/temperature experiments without the need for large drop-towers. Recently, we have used this to demonstrate gravito-magnetic lenses focusing or collimating matterwaves in a waveguide almost at will, e.g. reducing their expansion energies of condensates by a factor of 46 and thus measuring temperatures down to 800 pK. We will present the basic principles of TAAPs and its long-term prospects as a compact matterwave laboratory.