Abstract
We investigate multicomponent fermions in a flat band and predict experimental signatures of non-Fermi-liquid behavior. We use dynamical mean-field theory to obtain the density, double occupancy and entropy in a Lieb lattice for N=2 and N=4 components. We derive a mean-field scaling relation between the results for different values of N, and study its breakdown due to beyond mean-field effects. The predicted signatures occur at temperatures above the Néel temperature and persists even in the presence of a trapping potential, thus they are observable in current ultracold gas experiments.
| Original language | English |
|---|---|
| Article number | L031301 |
| Number of pages | 7 |
| Journal | Physical Review A |
| Volume | 103 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Mar 2021 |
| Publication type | A1 Journal article-refereed |
Funding
Acknowledgments. We thank T. I. Vanhala for useful discussions. This work was supported by the Academy of Finland under Projects No. 330384, No. 303351, No. 307419, No. 327293, and No. 318987 (QuantERA project RouTe), by the Grant-in-Aid for Scientific Research of the Ministry of Education, Culture Sports, Science, and Technology, Japan Society for the Promotion of Science (MEXT/JSPS KAKENHI, No. JP17H06138, No. JP18H05405, and No. JP18H05228), Japan Science and Technology Agency CREST (No. JPMJCR1673), and by MEXT Quantum Leap Flagship Program (MEXT Q-LEAP, No. JPMXS0118069021).
Publication forum classification
- Publication forum level 2
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics