Observation of a dipolar quantum gas with metastable supersolid properties

Year: 2019

Authors: Tanzi L., Lucioni E., Famā F., Catani J., Fioretti A., Gabbanini C., Bisset R.N., Santos L., Modugno G.

Autors Affiliation: CNR INO, Sede Secondaria Adriano Gozzini, Via Moruzzi 1, I-56124 Pisa, Italy; Univ Firenze, LENS, I-50019 Sesto Fiorentino, Italy; Univ Firenze, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, Italy; CNR INO, Sede Secondaria Sesto Fiorentino, I-50019 Sesto Fiorentino, Italy; Leibniz Univ Hannover, Inst Theoret Phys, Appelstr 2, D-30167 Hannover, Germany.

Abstract: The competition of dipole-dipole and contact interactions leads to exciting new physics in dipolar gases, well illustrated by the recent observation of quantum droplets and rotons in dipolar condensates. We show that the combination of the roton instability and quantum stabilization leads under proper conditions to a novel regime that presents supersolid properties due to the coexistence of stripe modulation and phase coherence. In a combined experimental and theoretical analysis, we determine the parameter regime for the formation of coherent stripes, whose lifetime of a few tens of milliseconds is limited by the eventual destruction of the stripe pattern due to three-body losses. Our results open intriguing prospects for the development of long-lived dipolar supersolids.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 122 (13)      Pages from: 130405  to: 130405

More Information: We acknowledge funding by the EC-H2020 research and innovation program (Grant No. 641122-QUIC) and the DFG (SFB 1227 DQ-mat and FOR 2247). R.N.B. was supported by the European Unionīs Horizon 2020 research and innovation program under Marie Sklodowska-Curie Grant Agreement No. 793504 (DDQF). We acknowledge support by L.A. Gizzi, S. Gozzini, and M. Inguscio, useful conversations with M. Fattori, G. Ferrari, and S. Stringari, and technical assistance from A. Barbini, F. Pardini, M. Tagliaferri, and M. Voliani.
KeyWords: Bose-Einstein condensate, supersolids, dipolar quantum gases
DOI: 10.1103/PhysRevLett.122.130405

Citations: 314
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