Scientific Results

A multiple beam interferometer for Bose-Einstein condensates

Year: 2003

Authors: Cataliotti F.S.

Autors Affiliation: INFM-Europ. Lab. Nonlin. Spectrosc., Dipartimento di Fisica, Università di Firenze, via Nello Carrara 1, 50019 Sesto F.no (FI), Italy

Abstract: We condense 87Rb atoms in the combined potential of an optical standing wave superimposed on a harmonic magnetic trap. By releasing the atoms from the combined trap we realise a multiple beam atom interferometer. The measured atomic interferogram provides information about macroscopic coherence throughout the sample. The atomic distribution is characterised by interference peaks. The time evolution of the peaks, their relative population, as well as their radial size are in agreement with the predictions of theory. By a perturbation of the magnetic trap we induce an oscillating atomic current related to coherent tunnelling of the Bose-Einstein condensates through the optical barriers. The frequency and amplitude of the oscillations are in agreement with a model based on the Josephson current-phase relations.

Journal/Review: FORTSCHRITTE DER PHYSIK-PROGRESS OF PHYSICS

Volume: 51 (4-5)      Pages from: 295  to: 304

KeyWords: PHASE-COHERENT AMPLIFICATION; MATTER WAVES; COLLECTIVE EXCITATIONS; SUPERFLUID; OSCILLATIONS; DYNAMICS; LATTICES; ARRAYS; ATOMS
DOI: 10.1002/prop.200310042

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