Risultati scientifici

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

Anno: 2010

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

Affiliazione autori: CNISM Dipartimento di Fisica E.Fermi, Universita di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy; CNR-INFM, Dipartimento di Fisica E.Fermi, Università di Pisa, Lgo Pontecorvo 3, 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.

Giornale/Rivista: LASER PHYSICS

Volume: 20 (5)      Da Pagina: 1182  A: 1189

Maggiori informazioni: Financial support by the EU-STREP NAMEQUAM and by a CNISM Progetto Innesco 2007 is gratefully acknowledged. We thank J. Radogostowicz and Y. Singh for assistance and A. Eckardt and M. Holthaus for the helpful suggestions. On of the authors (EA) thanks V.V. Konotop and M. Salerno for discussions.
Parole chiavi: Bose-Einstein condensation; optical lattices; quantum tunneling; dynamic localization; electric-field
DOI: 10.1134/S1054660X10090410

Citazioni: 19
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2022-01-16
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