Center for Ultracold Atoms and Quantum Gases, IExP and IQOQI, Innsbruck
Category for scientific news of the Erbium group
Now in Physical Review Letter!
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.
Now in Physical Review Letter!
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.
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.
Now in Physical Review Letter!
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.
In collaboration with our theory colleagues from Serbia (Antun Balaž, Vladimir Veljic), Germany (Axel Pelster) and Brazil (Aristeu R. P. Lima), we have investigated the ground-state properties of dipolar Fermi gases, extending the current understanding to the case of arbitrary dipole orientation and trapping geometries.
In collaboration with our theory collaborators from Innsbruck (Rick van Bijnen) and Hannover (Falk Wächtler and Luis Santos), we have observed for the first time so-called roton quasiparticles in an ultracold quantum gas of highly magnetic bosonic erbium.
