Scissors Mode of Dipolar Quantum Droplets of Dysprosium Atoms

Year: 2018

Authors: Ferrier-Barbut I., Wenzel M., Bottcher F., Langen T., Isoard M., Stringari S., Pfau T.

Autors Affiliation: [Ferrier-Barbut, Igor; Wenzel, Matthias; Boettcher, Fabian; Langen, Tim; Pfau, Tilman] Univ Stuttgart, Phys Inst 5, Pfaffenwaldring 57, D-70550 Stuttgart, Germany and Univ Stuttgart, Ctr Integrated Quantum Sci & Technol IQST, Pfaffenwaldring 57, D-70550 Stuttgart, Germany.
[Isoard, Mathieu; Stringari, Sandro] INO CNR BEC Ctr, I-38123 Povo, Italy and Univ Trento, Dipartimento Fis, I-38123 Povo, Italy.
[Isoard, Mathieu] Univ Paris Saclay, Univ Paris Sud, CNRS, LPTMS, F-91405 Orsay, France.

Abstract: We report on the observation of the scissors mode of a single dipolar quantum droplet. The existence of this mode is due to the breaking of the rotational symmetry by the dipole-dipole interaction, which is fixed along an external homogeneous magnetic field. By modulating the orientation of this magnetic field, we introduce a new spectroscopic technique for studying dipolar quantum droplets. This provides a precise probe for interactions in the system, allowing us to extract a background scattering length for Dy-164 of 69(4)a(0). Our results establish an analogy between quantum droplets and atomic nuclei, where the existence of the scissors mode is also only due to internal interactions. They further open the possibility to explore physics beyond the available theoretical models for strongly dipolar quantum gases.


Volume: 120 (16)      Pages from: 160402-1  to: 160402-6

KeyWords: Einstein condensed gas; deformed-nuclei; superfluidity; liquid;
DOI: 10.1103/PhysRevLett.120.160402

Citations: 73
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