Tunneling Control and Localization for Bose-Einstein Condensates in a Frequency Modulated Optical Lattice

Year: 2010

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

Autors Affiliation: Univ Pisa, Dipartimento Fis E Fermi, CNISM, I-56127 Pisa, Italy; Univ Pisa, Dipartimento Fis E Fermi, INFM, CNR, I-56127 Pisa, Italy

Abstract: The similarity between matter waves in periodic potential and solid-state physics processes has triggered the interest in quantum simulation using Bose-Fermi ultracold gases in optical lattices. The present work evidences the similarity between electrons moving under the application of oscillating electromagnetic fields and matter waves experiencing an optical lattice modulated by a frequency difference, equivalent to a spatially shaken periodic potential. We demonstrate that the tunneling properties of a Bose-Einstein condensate in shaken periodic potentials can be precisely controlled. We take additional crucial steps towards future applications of this method by proving that the strong shaking of the optical lattice preserves the coherence of the matter wavefunction and that the shaking parameters can be changed adiabatically, even in the presence of interactions. We induce reversibly the quantum phase transition to the Mott insulator in a driven periodic potential.

Journal/Review: LASER PHYSICS

Volume: 20 (5)      Pages from: 1182  to: 1189

DOI: 10.1134/S1054660X10090410

Citations: 21
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