Pulsed macroscopic quantum tunneling of falling Bose-Einstein condensates
Anno: 2001
Autori: Salasnich L., Parola A., Reatto L.
Affiliazione autori: Univ Milan, Dipartimento Fis, Ist Nazl Fis Mat, Unita Milano Univ, I-20133 Milan, Italy
Abstract: We investigate macroscopic quantum tunneling of a Bose-Einstein condensate, and how it is affected by the interatomic interaction. We study the dynamics of a condensate falling under gravity and scattering on a Gaussian potential barrier that models a mirror formed by a far-detuned sheet of light. We observe bouncing, interference, and quantum tunneling of the condensate. We find that the tunneling rate is very sensitive to the interatomic interaction and to the shape of the condensate. Under many conditions the tunneling rate is strongly enhanced by the interaction as achieved, for instance, by increasing the number of condensed particles. In a quasi one-dimensional situation the tunneling pulse displays two peaks. The quantum tunneling can be quasi-periodic, and in this way one could generate coherent Bose-Einstein condensed atomic pulses.
Giornale/Rivista: PHYSICAL REVIEW A
Volume: 64 (2) Da Pagina: 023601-1 A: 023601-5
Parole chiavi: Bose-Einstein condensationDOI: 10.1103/PhysRevA.64.023601Citazioni: 47dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-05-12Riferimenti 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