Creutz ladder in a resonantly shaken 1D optical lattice
Abstract
We report the experimental realization of a Creutz ladder for ultracold fermionic atoms in a resonantly driven 1D optical lattice. The two-leg ladder consists of the two lowest orbital states of the optical lattice and the cross inter-leg links are generated via two-photon resonant coupling between the orbitals by periodic lattice shaking. The characteristic pseudo-spin winding structure in the energy bands of the ladder system is demonstrated using momentum-resolved Ramsey-type interferometric measurements. We discuss a two-tone driving method to extend the inter-leg link control and propose a topological charge pumping scheme for the Creutz ladder system.
- Publication:
-
New Journal of Physics
- Pub Date:
- January 2020
- DOI:
- 10.1088/1367-2630/ab61d7
- arXiv:
- arXiv:1902.10304
- Bibcode:
- 2020NJPh...22a3023K
- Keywords:
-
- Creutz ladder model;
- periodically driven optical lattice;
- ultracold fermions in optical lattices;
- topological ladder;
- Condensed Matter - Quantum Gases;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 11 pages, 8 figures