Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session E04: Dynamics of Cold Atoms in Optical Lattices II
2:00 PM–3:48 PM,
Tuesday, June 1, 2021
Chair: Annabelle Bohrdt, Tech Univ Muenchen
Abstract: E04.00002 : Pair Correlations and Photoassociation Dynamics of Two Atoms in an Optical Tweezer*
2:12 PM–2:24 PM
Live
Presenter:
Marvin Weyland
(Dodd-Walls Centre for Photonic and Quantum Technologies, University of Otago)
Authors:
Marvin Weyland
(Dodd-Walls Centre for Photonic and Quantum Technologies, University of Otago)
Stuart Szigeti
(The Australian National University)
Rhys Hobbs
(Dodd-Walls Centre for Photonic and Quantum Technologies, University of Otago)
Poramaporn Ruksasakchai
(Dodd-Walls Centre for Photonic and Quantum Technologies, University of Otago)
Lucile Sanchez
(Dodd-Walls Centre for Photonic and Quantum Technologies, University of Otago)
Mikkel F Andersen
(Dodd-Walls-Centre for Photonic and Quantum Technologies, University of Otago)
We experimentally observe non-exponential decay of the atom pair which fundamentally differs from the dynamics in a many-atom ensemble, where photoassociation causes an exponential decay of the atomic population governed by a single rate coefficient that reaches a universal limit. This unique behavior is caused by the photoassociation process altering the atom-pair correlations as the process progresses. The observed rate coefficients for molecule formation from positively correlated atom pairs exceeds the unitarity limited rate coefficient found in many-atom ensembles. We compare the photoassociation dynamics of atom-pairs to those in a three-atom system, allowing us to probe the transition from two-atom to many-atom dynamics. Our results are underpinned by ab initio calculations.
Our findings show that this state-dependent photoassociation could be used as a new tool for the production or detection of atom-pair correlations in future experiments.
*This work was supported by the Marsden Fund Council from Government funding, administered by the Royal Society of New Zealand (Contract No. UOO1835).
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