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 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.

News from the labs
In a joint work from the RARE and ERBIUM team as well as our theory collaborator from IQOQI, Rick van Bijnen, we have observed hallmarks of supersolidity in dipolar quantum gases of Erbium and Dysprosium. Our work is highlighted in a Viewpoint article in Physics by T. Donner.
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Now on Physical Review Letter! We have created for the first time a dipolar quantum mixture by combining two highly magnetic atomic species, Erbium and Dysprosium. The experiment has been conducted in the RARE Lab and we observe simultaneous quantum degeneracy of 5 Bose-Bose mixture and a Bose-Fermi one.
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In our Erbium experiment, we have created the first two component dipolar Fermi gas with tunable interactions. This paves the way to studies of BEC-BCS physics in presence of an unprecedented few-body scattering scenario, including anisotropic long-range dipolar interactions and anisotropic short-range interactions.
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Group news
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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Together with an international Consortium of six other research groups Francesca Ferlaino in collaboration with Peter Zoller successfully applied for funding of the project "MAQS" – Magnetic-Atom Quantum Simulator.
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Welcome and goodbye
With the beginning of the new year, Matt joins our team as Post-Doc in the Er-Dy LAB. Welcome to Innsbruck, Matt!
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With the beginning of the new year, Bing joins our team as Post-Doc in the ERBIUM lab. After finishing his PhD in Heidelberg (DE) and Hefei (CN) under the supervision of Prof. Jian-Wei Pan in 2015, he continued as a Post-Doc in Heidelberg. Welcome, Bing!
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Alexandre de Martino, master student from the Institut d'Optique at Palaiseau, France, joins our group for five months to do his final master internship. He will focus on upgrading the transversal cooling scheme of our Erbium experiment.
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