Superfluidity and dissipation in experiments with ultracold atoms
National Institute of Optics (INO-CNR)
The ability to carry mass currents with zero dissipation is the hallmark of superfluidity.
In the first part of the talk I will present the experimental investigation of the dissipation in one-dimensional Bose superfluids flowing along a periodic potential [1,2], which show signatures of the presence of quantum phase slips, i.e the primary excitations in one-dimensional superfluids at low temperature.
In the second part of the talk I will discuss the assembly of a new Potassium-Rubidium machine to produce a double component superfluid systems in a ring potential to study persistent currents in the mixture and the non dissipative drag, expected to occur between the two interacting superfluid components.
 L. Tanzi et al., Sci. Rep. 6, 25965 (2016)
 S. Scaffidi Abbate et al., EPJST 226, 2815 (2017)
Chiara D'Errico is a researcher of the National Institute of Optics (INO) within the National Research Council (CNR) in Florence, and a fellow of the European Laboratory for Nonlinear Spectroscopy (LENS). Her main research focus is about ultracold condensed matter systems.
During her PhD and Postdocs, she studied a number of fundamental single particle, few-body and many-body problems in Physics.
Her major achievements are:
- observation of the Anderson localization in an atomic system;
- observation of an Efimov spectrum in an atomic system;
- observation of the interplay of disorder and interactions, from Anderson localization to the Bose glass;
- study of transport in low-dimensional systems, with and without disorder.
She is currently conducting experiments on quantum mixture to study multicomponent superfluids, dissipation mechanisms, non-equilibrium dynamics, impurities in a bath, etc.