Different lattice geometries with synthetic dimension
  The possibility of creating different geometries with the help of an extra synthetic dimension in optical lattices is studied. Additional linear potential and Raman assisted tunnelings are used to engineer well controlled tunnelings between available states. The great flexibility of the system allows us to obtain different geometries of synthetic lattices with possibility of adding synthetic gauge fields. 
Dominik Suszalski and Jakub Zakrzewski
cond-mat.quant-gas