Expansion of a coherent array of Bose-Einstein condensates

Year: 2001

Authors: Pedri P., Pitaevskii L., Stringari S., Fort C., Burger S., Cataliotti F. S., Maddaloni P., Minardi F., Inguscio M.

Autors Affiliation: Dipartimento di Fisica, Università di Trento and Istituto Nazionale per la Fisica della Materia, I-38050 Povo, Italy;
Kapitza Institute for Physical Problems, Moscow, Russia;
LENS, Dipartimento di Fisica, Università di Firenze and Istituto Nazionale per la Fisica della Materia, Largo E. Fermi 2, I-50125 Firenze, Italy;
Dipartimento di Fisica, Università di Padova, via F. Marzolo 8, I-35131 Padova, Italy

Abstract: We investigate the properties of a coherent array containing about 200 Bose-Einstein condensates produced in a far detuned 1D optical lattice. The density profile of the gas, imaged after releasing the trap, provides information about the coherence of the ground-state wave function. The measured atomic distribution is characterized by interference peaks. The time evolution of the peaks, their relative population, as well as the radial size of the expanding cloud are in good agreement with the predictions of theory. The 2D nature of the trapped condensates and the conditions required to observe the effects of coherence are also discussed.


Volume: 87 (22)      Pages from: 220401-1  to: 220401-4

KeyWords: Interference; Gases; Bose-Einstein condensates; Harmonically trapped
DOI: 10.1103/PhysRevLett.87.220401

Citations: 182
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