Loading and compression of a single two-dimensional Bose gas in an optical accordion

Year: 2017

Authors: Ville J. L., Bienaime T., Saint-Jalm R., Corman L., Aidelsburger M., Chomaz L., Kleinlein K., Perconte D., Nascimbene S., Dalibard J., Beugnon J.

Autors Affiliation: UPMC Sorbonne Univ, ENS PSL Res Univ, CNRS, Lab Kastler Brossel,Coll France, 11 Pl Marcelin Berthelot, F-75005 Paris, France; Univ Trento, INO CNR BEC Ctr, I-38123 Povo, Italy; Univ Trento, Dipartimento Fis, I-38123 Povo, Italy; ETH, Inst Quantum Elect, CH-8093 Zurich, Switzerland; Univ Innsbruck, Inst Expt Phys, Tech Str 25, A-6020 Innsbruck, Austria; Univ Paris Saclay, Univ Paris Sud, Unite Mixte Phys, CNRS,Thales, F-91767 Palaiseau, France.

Abstract: The experimental realization of two-dimensional (2D) Bose gases with a tunable interaction strength is an important challenge for the study of ultracold quantum matter. Here we report on the realization of an optical accordion creating a lattice potential with a spacing that can be dynamically tuned between 11 and 2 mu m. We show that we can load ultracold Rb-87 atoms into a single node of this optical lattice in the large spacing configuration and then decrease nearly adiabatically the spacing to reach a strong harmonic confinement with frequencies larger than omega(z)/2 pi = 10 kHz. Atoms are trapped in an additional flat-bottom in-plane potential that is shaped with a high resolution. By combining these tools we create custom-shaped uniform 2D Bose gases with tunable confinement along the transverse direction and hence with a tunable interaction strength.

Journal/Review: PHYSICAL REVIEW A

Volume: 95 (1)      Pages from: 13632-1  to: 13632-7

More Information: We thank Z. Hadzibabic for fruitful discussions. This work is supported by DIM NanoK, ANR (ANR-12-BLANAGAFON), and ERC (Synergy UQUAM). L.C. acknowledges the support from DGA. M.A. is supported within the Marie Curie Project BosQuanTran of the European Commission.
KeyWords: Atomic Gases; Systems; Physics
DOI: 10.1103/PhysRevA.95.013632

Citations: 41
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