Journal
PHYSICAL REVIEW LETTERS
Volume 125, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.133001
Keywords
-
Categories
Funding
- NSF
- AFOSR
- ARO through the MURI program [FA9550-14-1-0035, W911NF-17-1-0323]
- Austrian Science Fund FWF within the DK-ALM [W1259 -N27]
Ask authors/readers for more resources
Geometric frustration of particle motion in a kagome lattice causes the single-particle band structure to have a flat s-orbital band. We probe this band structure by placing a Bose-Einstein condensate into excited Bloch states of an optical kagome lattice, and then measuring the group velocity through the atomic momentum distribution. We find that interactions renormalize the band structure, greatly increasing the dispersion of the third band, which is nearly non-dispersing the single-particle treatment. Calculations based on the lattice Gross-Pitaevskii equation indicate that band structure renormalization is caused by the distortion of the overall lattice potential away from the kagome geometry by interactions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available