Dynamical control of matter-wave tunneling in periodic potentials
Anno: 2007
Autori: Lignier H., Sias C., Ciampini D., Singh Y., Zenesini A., Morsch O., Arimondo E.
Affiliazione autori: CNR-INFM, Dipartimento di Fisica “E. Fermi,” Università di Pisa, Largo Pontecorvo 3, 56127 Pisa, Italy
Abstract: We report on measurements of dynamical suppression of interwell tunneling of a Bose-Einstein condensate (BEC) in a strongly driven optical lattice. The strong driving is a sinusoidal shaking of the lattice corresponding to a time-varying linear potential, and the tunneling is measured by letting the BEC freely expand in the lattice. The measured tunneling rate is reduced and, for certain values of the shaking parameter, completely suppressed. Our results are in excellent agreement with theoretical predictions. Furthermore, we have verified that, in general, the strong shaking does not destroy the phase coherence of the BEC, opening up the possibility of realizing quantum phase transitions by using the shaking strength as the control parameter.
Giornale/Rivista: PHYSICAL REVIEW LETTERS
Volume: 99 (22) Da Pagina: 220403-1 A: 220403-4
Parole chiavi: Optical Lattices; Quantum tunneling; Bose-Einstein condensatesDOI: 10.1103/PhysRevLett.99.220403Citazioni: 541dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-12-08Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui