Angular oscillations in a 2D supersolid of Dysprosium
ORAL
Abstract
When cooled to quantum degeneracy, gases of dipolar atoms, such as dysprosium, can spontaneously form a modulated many-body state, while simultaneously exhibiting global phase coherence: the supersolid phase. There is great interest in the direct observation of superfluid flow of such a state. For non-modulated superfluids the scissors mode can be directly connected to the moment of inertia and shows an increased frequency compared to classical rigid-body rotation. We probed the response of linear, “zig-zag” and hexagonal supersolid states to small angle rotations and observe a rich excitation spectrum. Our work shows that deducing the moment of inertia from a supersolid state requires knowledge of the full excitation spectrum, motivating further investigation and development of more elaborate excitation schemes to preferentially excite the low frequency modes.
*ERC Consolidator Grant (RARE, No. 681432)NFRI grant (MIRARE, No. OAW0600)QuantERA grant MAQS (FWF, No I4391-N)
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Publication: Matthew A. Norcia et. al. , arXiv:2111.07768 (2021)
Presenters
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Lauritz Klaus
- Institut für Quantenoptik und Quanteninformation Innsbruck; Institut für Experimentalphysik, Universität Innsbruck
- Institut für Quantenoptik und Quanteninformation Innsbruck