Observation of photon-assisted tunneling in optical lattices

Year: 2008

Authors: Sias C., Lignier H., Singh Y.P., Zenesini A., Ciampini D., Morsch O., Arimondo E.

Autors Affiliation: CNR-INFM, Dipartimento di Fisica “E. Fermi,” Università di Pisa, Largo Pontecorvo 3, 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 (4)      Pages from: 040404  to: 040404

KeyWords: Optical Lattices; Quantum tunneling;
DOI: 10.1103/PhysRevLett.100.040404

Citations: 199
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