ReportsPhysics

An atom-by-atom assembler of defect-free arbitrary 2D atomic arrays

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Science  03 Nov 2016:
aah3778
DOI: 10.1126/science.aah3778

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Abstract

Large arrays of individually controlled atoms trapped in optical tweezers are a very promising platform for quantum engineering applications. However, deterministic loading of the traps is experimentally challenging. Here, we demonstrate the preparation of fully loaded, two-dimensional arrays of up to ~50 microtraps each containing a single atom, and arranged in arbitrary geometries. Starting from initially larger, half-filled matrices of randomly loaded traps, we obtain user-defined target arrays at unit filling. This is achieved with a real-time control system and a moving optical tweezer that performs a sequence of rapid atom moves depending on the initial distribution of the atoms in the arrays. These results open exciting prospects for quantum engineering with neutral atoms in tunable two-dimensional (2D) geometries.

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