Preparation of ultra-cold atomic-ensemble arrays using time-multiplexed optical tweezers

• URL: http://arxiv.org/abs/2203.11617v2
• Date: Thu, 21 Jul 2022 08:59:10 GMT
• Title: Preparation of ultra-cold atomic-ensemble arrays using time-multiplexed optical tweezers
• Authors: Katja Gosar, Vesna Pirc Jev\v{s}enak, Tadej Me\v{z}nar\v{s}i\v{c}, Du\v{s}an Babi\v{c}, Igor Poberaj, Erik Zupani\v{c}, Peter Jegli\v{c}
• Abstract summary: We use optical tweezers based on time-multiplexed acousto-optic deflectors to trap ultra-cold cesium atoms in one-dimensional arrays of atomic ensembles. For temperatures between 2.5 $mu$K and 50 nK we study the maximal time between optical tweezer pulses that retains the number of atoms in a single trap. We demonstrate three different protocols for the preparation of atomic-ensemble arrays by transfer from an expanding ultra-cold atomic cloud.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We use optical tweezers based on time-multiplexed acousto-optic deflectors to trap ultra-cold cesium atoms in one-dimensional arrays of atomic ensembles. For temperatures between 2.5 $\mu$K and 50 nK we study the maximal time between optical tweezer pulses that retains the number of atoms in a single trap. This time provides an estimate on the maximal number of sites in an array of time-multiplexed optical tweezers. We demonstrate evaporative cooling of atoms in arrays of up to 25 optical tweezer traps and the preparation of atoms in a box potential. Additionally, we demonstrate three different protocols for the preparation of atomic-ensemble arrays by transfer from an expanding ultra-cold atomic cloud. These result in the preparation of arrays of up to 74 atomic ensembles consisting of $\sim$100 atoms on average.

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