Phase coherence in out-of-equilibrium supersolid states of ultracold dipolar atoms

Phase coherence in out-of-equilibrium supersolid states of ultracold dipolar atoms

By quenching the contact interaction, it is possible to destroy the phase coherence in a dipolar supersolid. However, the supersolidity is “repaired” when reversing the dephasing process.  

3D array of large-spin fermions

3D array of large-spin fermions

In joint theoretical and experimental work with our theory colleagues A.-M. Rey (JILA) and B. Zhu (ITAMP) we investigate dipolar induced magnetization-conserving spin exchange dynamics with fermionic Er in a 3D optical lattice

The ERBIUM lab

The ERBIUM lab

The ERBIUM lab

Excitation spectrum of a trapped dipolar supersolid

Excitation spectrum of a trapped dipolar supersolid

In a combined theory and experimental work, we study the elementary excitations of trapped dipolar quantum gases crossing from regular superfluid to supersolid.

First Dipolar Quantum Mixtures!

First Dipolar Quantum Mixtures!

We have created for the first time a dipolar quantum mixture by combining two highly magnetic atomic species, Erbium and Dysprosium.

Observation of roton quasiparticles in Erbium

Observation of roton quasiparticles in Erbium

In collaboration with our theory collaborators from Innsbruck and Hannover, we have observed for the first time so-called roton quasiparticles in an ultracold bosonic gas of erbium atoms.

Double MOT …

Double MOT …

… of cold erbium (yellow) and dysprosium (red) atoms. © IQOQI

Laser setup …

Laser setup …

… for slowing and trapping erbium and dysprosium atoms. © IQOQI

Our dipolar quantum gas group …

Our dipolar quantum gas group …

…we work with highly magnetic Erbium and Dysprosium atoms, which we cool to Nanokelvin temperatures in oder to explore the fascinating physics of the quantum world.

Working in ultrahigh vacuum

Working in ultrahigh vacuum

All our experiments are carried out at pressures of 10^(-11) mbar. In order to achieve these ultrahigh vacuums, carefully designed chambers need to be machined and assembled.

The Dipolar Quantum Gas Group is one of the three teams composing the Innsbruck Center for Ultracold Atoms and Quantum Gases. We focus on highly magnetic Lanthanide atoms, Erbium and Dysprosium, which are a novel and powerful resource for realizing dipolar quantum matter.

The group, led by Francesca Ferlaino, is located at the  Institute for Experimental Physics (IExP) of the University of Innsbruck and at the Institute for Quantum Optics and Quantum Information (IQOQI) of the Austrian Academy of Sciences.

We have three experimental apparatuses. The ERBIUM machine operates on Er atoms and produced the first Er Bose-Einstein condensate and degenerate Fermi gas. The ER-DY machine is studying degenerate mixtures of two different lanthanides: Er and Dy. The T-Reqs is currently under construction and aims at studying Rydberg states of Er. A new theory sub-division within our group is under development.

You can follow updates from our labs on Twitter.

News from the labs
Supersolids go circular! Our Er-Dy and theory labs collaborate together to realise supersolidity in round traps. We also investigate effective formation protocols for two-dimensional supersolids, and explore the rich excitation spectra of these objects.
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Our experimental work on the lifecycle of a supersolid got selected as APS Editors' Suggestion, featured in Physics Viewpoint with an article by Chinmayee Mishra and in Physics World with an article by Oliver Stockdale. Congratulation to the Er-Dy Team!
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Now in PRL! The supersolid phase transition at finite temperature is poorly understood since tools for an adequate theoretical simulation are still lacking. We have characterised the evaporative formation of a dipolar supersolid from a thermal gas using in-situ imaging. The work is to appear in PRL.
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Group news
On the 25/02/2020, Sandra held her defense for her master thesis and is now officially a Master of Science! Congratulations!
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Simon Baier is honored for his dissertation "Ultracold Dipolar Erbium Atoms: From Scattering Phenomena to Quantum Simulations", which gives an overview of his research on dipolar quantum phenomena. It documents Simon Baier's research on the long-range magnetic interaction of ultracold particles, which he studied in the group of Francesca Ferlaino.
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The Physics magazine of the American Physical Society (APS) has named the discovery of super solidity in ultra cold quantum gases as one of the top ten Highlights of 2019.
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Welcome and goodbye
Welcome to Elena, who has joined the Theory team as PhD Student.
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Welcome to Amal El-Arrach and Simon Gschwendter, who have joined respectively the T-REQS and the Erbium teams for their master thesis.
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Welcome to Dr. Hagai Edri (right) and Julián Maloberti (left) who have joined the T-Reqs team as postdoctoral fellow and Phd student, respectively.
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