Synthetic dimensions and spin-orbit coupling with an optical clock transition.

Livi L.F., Cappellini G., Diem M., Franchi L., Clivati C., Frittelli M., Levi F., Calonico D., Catani J., Inguscio M., Fallani L.
  Lunedì 11/09   14:30 - 18:30   Aula A224   II - Fisica della materia
We demonstrate a new method to synthesize spin-orbit interaction which exploits the ultranarrow clock transition between the $P^{1}S_{0}$ and the long-lived ${}^{3}P_{0}$ state in degenerate ${}^{173}Yb$ atoms. By mapping the electronic states as effective sites along a synthetic "electronic" dimension, we create synthetic fermionic ladders with tunable synthetic magnetic flux. In this experimental setup we measured for the first time the dependence of the chiral edge currents on the magnetic flux, providing a direct evidence of the inversion of the edge chiral current when the flux increases above $\pi$.