Return to the Origin as a Probe of Atomic Phase CoherenceReport as inadecuate

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1 PhLAM - Physique des Lasers, Atomes et Molécules 2 Information et Chaos Quantiques LPT LPT - Laboratoire de Physique Théorique - IRSAMC 3 LKB Jussieu - Laboratoire Kastler Brossel

Abstract : We report on the observation of the coherent enhancement of the return probability - enhanced return to the origin - , ERO in a periodically kicked cold-atom gas. By submitting an atomic wave packet to a pulsed, periodically shifted laser standing wave, we induce an oscillation of ERO in time and explain it in terms of a periodic, reversible dephasing in the weak-localization interference sequences responsible for ERO. Monitoring the temporal decay of ERO, we exploit its quantum coherent nature to quantify the decoherence rate of the atomic system.

Keywords : 7215Rn 0375-b 0545Mt 6470qj

Author: Clément Hainaut - Isam Manai - Radu Chicireanu - Jean-François Clément - Samir Zemmouri - Jean Claude Garreau - Pascal Szriftg



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