Enhanced visibility of the Fulde-Ferrell-Larkin-Ovchinnikov state in one-dimensional Bose-Fermi mixtures near the immiscibility point
Based on the matrix product states method, we investigate numerically the ground-state properties of one-dimensional mixtures of repulsive bosons and spin-imbalanced attractive fermions, the latter being in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, where Cooper pairs condense at a finite mo...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-05-01
|
| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.023148 |
| Summary: | Based on the matrix product states method, we investigate numerically the ground-state properties of one-dimensional mixtures of repulsive bosons and spin-imbalanced attractive fermions, the latter being in the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, where Cooper pairs condense at a finite momentum k=k_{FFLO}. We find that the visibility of such a state is dramatically enhanced as the repulsive Bose-Fermi mixture is brought close to the phase-separation point. In particular, large-amplitude self-induced oscillations with wave vector 2k_{FFLO} appear in both the fermion total density and the boson density profiles, leaving sharp fingerprints in the corresponding static structure factors. We show that these features remain quite visible in cold-atom systems trapped longitudinally by a smooth flat-bottom potential. Hence bosons can be used to directly reveal the modulated Fermi superfluid in experiments. |
|---|---|
| ISSN: | 2643-1564 |