Observation of photon-assisted tunneling in optical lattices
Authors: Sias C., Lignier H., Singh Y.P., Zenesini A., Ciampini D., Morsch O., Arimondo E.
Autors Affiliation: Univ Pisa, Dipartimento Fis E Fermi, CNR, INFM, I-56127 Pisa, Italy; CNISM Unita Pisa, Pisa, Italy
Abstract: 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.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 100 Pages from: 040404-1 to: 040404-4
KeyWords: COHERENT, Optical lattices, Bose Einstein condensatesDOI: 10.1103/PhysRevLett.100.040404