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 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. Our work is now published in Physical Review Research.
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In a combined theory and experimental work, we study the elementary excitations of trapped dipolar quantum gases crossing from regular superfluid to supersolid. Our work is now published in PRL and summarized in the Synopsis by Sophia Chen.
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In quantum physics, the spectrum of elementary excitations dictates the way a quantum system behaves and reacts to perturbations. Hence, in superfluids, the possibility of frictionless flow is encoded in their excitation spectrum.
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Group news
Since May 15th 2020, Lauriane has joined the Editorial Board of New Journal of Physics (NJP). NJP is a scientific journal publishing important new research with significance across a broad readership.
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Jan held his defense for his PhD thesis and is now officially a Doctor of Philosophy. He will continue to carry out his research as a post-doctoral fellow in the group of Selim Jochim in Heidelberg. Congratulations and good luck!
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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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Welcome and goodbye
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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Beginning in July, Russell joined the University of Innsbruck as an Assistant Professor. He is building a theory group within the Department of Experimental Physics, with a focus on ultracold quantum gases, most notably bringing his expertise on dipolar Bose-Einstein condensates. He is looking forward to working in Innsbruck and
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After completing the Master's degree in Heidelberg under the supervision of Prof. Weidemüller in the Li-Cs mixture experiment, Lauritz joined our team in February as a PhD student in the Er-Dy dipolar quantum mixture Lab. Welcome to Innsbruck, Lauritz!
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