Quantum Sensing in Tweezer Arrays: Optical Magnetometry on an Individual-Atom Sensor Grid

• URL: http://arxiv.org/abs/2307.08055v3
• Date: Fri, 8 Mar 2024 13:25:01 GMT
• Title: Quantum Sensing in Tweezer Arrays: Optical Magnetometry on an Individual-Atom Sensor Grid
• Authors: Dominik Sch\"affner, Tobias Schreiber, Fabian Lenz, Malte Schlosser, Gerhard Birkl
• Abstract summary: We implement a scalable platform for quantum sensing comprising hundreds of sites capable of holding individual laser-cooled atoms. We demonstrate the applicability of this single-quantum-system sensor array to magnetic-field mapping on a two-dimensional grid. This individual-atom sensor platform finds its immediate application in mapping an externally applied gradient DC magnetic field.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We implement a scalable platform for quantum sensing comprising hundreds of sites capable of holding individual laser-cooled atoms and demonstrate the applicability of this single-quantum-system sensor array to magnetic-field mapping on a two-dimensional grid. With each atom being confined in an optical tweezer within an area of 0.5 micrometer^2 at mutual separations of 7.0(2) micrometer, we obtain micrometer-scale spatial resolution and highly parallelized operation. An additional steerable optical tweezer allows for a rearrangement of atoms within the grid and enables single-atom scanning microscopy with sub-micron resolution. This individual-atom sensor platform finds its immediate application in mapping an externally applied DC gradient magnetic field. In a Ramsey-type measurement, we obtain a field resolution of 98(29) nanotesla. We estimate the sensitivity to 25 microtesla/Hz^1/2.

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