Time-domain atom interferometry across the threshold for Bose-Einstein condensation

Year: 2001

Authors: Minardi F., Fort C., Maddaloni P., Modugno M., Inguscio M.

Autors Affiliation: INFM-European Laboratory for Nonlinear Spectroscopy(LENS), Dipartimento di Fisica, Università di Firenze, Largo E. Fermi 2, Firenze, I-50125, Italy; Dipartimento di Fisica, Università di Padova, Via F. Marzolo 8, Padova, I-35131, Italy

Abstract: We have performed time-domain interferometry experiments with matter waves trapped in a harmonic potential above and below the Bose-Einstein phase transition, by means of the method of separated oscillating fields, with a variable time delay T. We observe the oscillations of the population between two internal Zeeman states versus the delay T to be rapidly depleted both below and slightly above Bose-Einstein condensation. We give a quantitative explanation in terms of the phase evolution due to the entanglement between the internal and external degrees of freedom.


Volume: 87 (17)      Pages from: 170401-1  to: 170401-4

KeyWords: Condensate treatment; Degrees of freedom (mechanics); Interferometry; Oscillations; Phase transitions; Time domain analysis, Bose-Einstein condensates (BEC); Radio frequency (rf) pulses, Gas condensates
DOI: 10.1103/PhysRevLett.87.170401

Citations: 17
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