Strongly Interacting Mass Imbalanced Superfluid with ultracold fermions

Projektinformationen

SIMIS

ID Finanzhilfevereinbarung: 894429

DOI

10.3030/894429

Das Projekt endete am 30 November 2020

EK-Unterschriftsdatum 24 Februar 2020

Startdatum 1 Juli 2020

Enddatum 30 Juni 2022

Finanziert unter

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Gesamtkosten

€ 174 167,04

EU-Beitrag

€ 174 167,04

Koordiniert durch

UNIVERSITAET INNSBRUCK
Austria

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

Berichtszeitraum: 2020-07-01 bis 2022-06-30

Zusammenfassung vom Kontext und den Gesamtzielen des Projekts

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.

Arbeit, die ab Beginn des Projekts bis zum Ende des durch den Bericht erfassten Berichtszeitraums geleistet wurde, und die wichtigsten bis dahin erzielten Ergebnisse

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.

Fortschritte, die über den aktuellen Stand der Technik hinausgehen und voraussichtliche potenzielle Auswirkungen (einschließlich der bis dato erzielten sozioökonomischen Auswirkungen und weiter gefassten gesellschaftlichen Auswirkungen des Projekts)

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