We have observed tunneling suppression and photon-assisted tunneling of Bose-Einstein condensates in an optical lattice subjected to a constant force plus a sinusoidal shaking. For a sufficiently large constant force, the ground energy levels of the lattice are shifted out of resonance and tunneling is suppressed; when the shaking is switched on, the levels are coupled by low-frequency photons and tunneling resumes. Our results agree well with theoretical predictions and demonstrate the usefulness of optical lattices for studying solid-state phenomena.
|Autori:||Sias C; Lignier H; Singh YP; Zenesini A; Ciampini D; Morsch O; Arimondo E|
|Titolo:||Observation of photon-assisted tunneling in optical lattices|
|Anno del prodotto:||2008|
|Digital Object Identifier (DOI):||10.1103/PhysRevLett.100.040404|
|Appare nelle tipologie:||1.1 Articolo in rivista|