Strongly Interacting Mass Imbalanced Superfluid with ultracold fermions

Información del proyecto

SIMIS

Identificador del acuerdo de subvención: 894429

DOI

10.3030/894429

Proyecto finalizado el 30 Noviembre 2020

Fecha de la firma de la CE 24 Febrero 2020

Fecha de inicio 1 Julio 2020

Fecha de finalización 30 Junio 2022

Financiado con arreglo a

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coste total

€ 174 167,04

Aportación de la UE

€ 174 167,04

Coordinado por

UNIVERSITAET INNSBRUCK
Austria

Periodic Reporting for period 1 - SIMIS (Strongly Interacting Mass Imbalanced Superfluid with ultracold fermions)

Período documentado: 2020-07-01 hasta 2022-06-30

Resumen del contexto y de los objetivos generales del proyecto

The project aims at novel superfluid states in mixtures of ultracold fermionic atoms. Using different atomic species introduces mass imbalance into the problem, which according to theoretical predictions favors the emergence of unconventional superfluids. Such superfluids have been widely discussed in the theoretical literature, but have been elusive in the lab. With the mixture of dysprosium and potassium atoms, we have introduced a new and very promising platform for experimental research along these lines. A central objective is the realization of the first mass-imbalanced superfluid system of fermions.

Trabajo realizado desde el comienzo del proyecto hasta el final del período abarcado por el informe y los principales resultados hasta la fecha

In the first 5 months of the project we have optimized the preparation process of a deeply quantum-degenerate sample. This involves laser cooling and trapping and novel schemes of evaporative cooling of the quantum mixture. Moreover, we have developed schemes for the efficient tuning of interactions between the two components via a quantum-mechanical resonance (so-called Feshbach resonance). In this way, we have reached the major milestone of a strongly interacting mixture of fermionic dysprosium and potassium atoms.

Avances que van más allá del estado de la técnica e impacto potencial esperado (incluida la repercusión socioeconómica y las implicaciones sociales más amplias del proyecto hasta la fecha)

We have created the first quantum-degenerate, strongly interacting mixture of ultracold fermionic atoms with different masses, and we expect to reach the superfluid state in further experiments. As a wider impact, the project will provide deeper understanding of exotic mechanisms that lead to superfluidity and superconductivity in new materials.

Effect of strong interactions on the spatial profile of fermionic K atoms mixed with Dy atoms