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
For the first time, we experimentally observe the transition at 1299nm in atomic erbium. We demonstrate coherent control and perform a detailed study of the transition parameters.
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Our team has made first observations of Erbium Rydberg levels in a hot atomic beam. Using a spectroscopy technique called electromagnetically induced transparency (EIT) we have measured more than 550 highly excited states of Er166. Our results show how the unique properties of Erbium effect the Rydberg series and provide
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Quantum matter can be solid and fluid at the same time – a situation known as supersolidity. Researchers led by Italian quantum physicist Francesca Ferlaino have now created for the first time this fascinating property along two dimensions. They now report in the journal Nature on the realization of supersolidity
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Group news
In recognition of her outstanding achievements, Francesca Ferlaino was elected a Corresponding Member of the Mathematical and Natural Sciences Class of the Austrian Academy of Sciences.
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Russell has been awarded one of only six ESQ Discovery Project grants this year. The Discovery Programme supports new ideas and innovative research that go beyond traditional thinking.
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Philipp and Gianmaria held their defenses for their PhD thesis and are now officially Doctors of Philosophy. Congratulations and we wish you all the best for your future!
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Welcome and goodbye
Welcome to Eva, who has joined the Er-Dy team as PhD Student.
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Bing Yang is moving to the Southern University of Science and Technology (SUSTech) as Associate Professor. Congratulation Bing! We wish you great success in your next adventure in physics.
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Welcome to Eva, who has joined the Er-Dy team as PhD Student.
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