is presented. The retroreflection optics necessary for forming the lattice are bonded directly
to the atom chip, enabling a compact and robust on-chip optical lattice system. After
achieving Bose–Einstein condensation in a magnetic chip trap, we load atoms directly into a
vertically oriented 1D optical lattice and demonstrate Landau–Zener tunneling. The atom
chip technology presented here can be readily extended to higher dimensional optical …