Supersolid in a new dimension

Supersolid in a new dimension

A two-dimensional supersolid system

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.  

Study of interspecies Feshbach resonances published in PRA

Study of interspecies Feshbach resonances published in PRA

A key step in creating controlled interactions in dipolar quantum mixtures is the characterization of interspecies Feshbach resonances.

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.

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

The main vacuum chamber …

The main vacuum chamber …

… where trap and furthermore cool erbium and dysprosium down to degeneracy. © IQOQI

Er-Dy LAB

The Er-Dy LAB focuses on many-body quantum phenomena in a dipolar quantum mixture of two highly magnetic lanthanides, Erbium and Dysprosium.

The designing process of the experimental apparatus started in late 2014 and several concepts have been developped in collaboration with our ERBIUM Team and the Er-Team at Harvard University led by Markus Greiner.

Er-Dy mixtures

In 2018, we produced the first quantum degenerate dipolar mixture of Erbium and Dysprosium!!

This two rare-earth species are highly magnetic with a magnetic moment of 7µB and 10µB for Er and Dy respectively. A crucial aspect is that the have very similar atomic properties such as melting point, mass and the optical spectrum. The Er-Dy LAB is able to either operate on a single species (Er or Dy) or to produce dipolar imbalanced Bose-Bose, Bose-Fermi and Fermi-Fermi Er-Dy mixtures.

A microscope for dipolar atoms

A quantum gas microscope is an optical system that allows to image single atoms in an optical lattice in situ. This conceptually simple, yet technologically demanding technique makes it possible to directly study the interactions between atoms in periodic potentials, a scenario which is only possible to simulate numerically for very limited system sizes. In contrast to other groups, we are aiming to realize such a microscope with atoms featuring a large, permanent magnetic dipole moment. The inter-atomic dipole-dipole interaction adds a new term to the Hamiltonian describing the ensemble, and therefore allows to investigate a whole new class of quantum systems. The behavior of the system will critically depend on the interplay between the different interaction terms, whose magnitude and direction dependence may be tuned experimentally over a wide range. Thus, a large variety of interesting quantum systems can be simulated and investigated.

Lab news
Our review on the quantum many-body physics in ultracold magnetic lanthanides is now published in Nature Physics!
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Our 2019 paper is chosen as one of PRX's favourite papers from the last 10 years!
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In a new pre-print, we investigate the extent that angular oscillations of a dipolar supersolid can tell us about the superfluidity of the system. Extending previous studies of linear droplet arrays, to crystals of two-dimensional structure.
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We present a first study of the influence of the dipole-dipole interaction on the total inter-species interaction in our erbium-dysprosium mixture, in collaboration with M. Modugno from the University of the Basque Country.
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Francesca has been awarded the Cardinal Innitzer Prize for Natural Sciences 2021 last weekend in Vienna for her outstanding achievements in the field of ultracold quantum gases. Her pioneering work with lathanoid atoms has been internationally groundbreaking in this field.
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Applications have now opened for the Introductory Course on Ultracold Quantum Gases 2022 winter school. This will take place in Innsbruck between the 9th and 11th February 2022.
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Lab Team