Superfluidity and dissipation in experiments with ultracold atoms

Immagine di Chiara D'Errico

Ore 14
Torino, INRIM
Sala Conferenze

Chiara D'Errico
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.


[1] L. Tanzi et al., Sci. Rep. 6, 25965 (2016)
[2] S. Scaffidi Abbate et al., EPJST 226, 2815 (2017)


Nota biografica

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.

Ultima modifica: 15/03/2018 - 19:39