Tweezer-assisted subwavelength positioning of atomic arrays in an optical cavity

• URL: http://arxiv.org/abs/2502.13560v1
• Date: Wed, 19 Feb 2025 09:14:09 GMT
• Title: Tweezer-assisted subwavelength positioning of atomic arrays in an optical cavity
• Authors: Matthias Seubert, Lukas Hartung, Stephan Welte, Gerhard Rempe, Emanuele Distante,
• Abstract summary: We prepare defect-free arrays of 87Rb atoms within a microscopic high-finesse optical standing-wave cavity. We leverage our control capabilities to assemble an array of up to seven atoms with an efficiency that exceeds previous probabilistic methods by 4 orders of magnitude.
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• Abstract: We present an experimental technique that enables the preparation of defect-free arrays of 87Rb atoms within a microscopic high-finesse optical standing-wave cavity. By employing optical tweezers, we demonstrate atom positioning with a precision well below the cavity wavelength, a crucial requirement for cavity-QED experiments in which maximum atom-cavity coupling strength is required. We leverage our control capabilities to assemble an array of up to seven atoms with an efficiency that exceeds previous probabilistic methods by 4 orders of magnitude. The atoms are subsequently transferred from the tweezer array to a two-dimensional intracavity optical lattice that offers enhanced coherence for spin qubits while maintaining strong atom confinement. Our system overcomes the efficiency limitations of previous probabilistic loading techniques of cavity-coupled atom arrays and opens the path to multiqubit quantum networks with atoms strongly coupled to optical cavities.

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