Multiparameter estimation with an array of entangled atomic sensors

• URL: http://arxiv.org/abs/2504.08677v1
• Date: Fri, 11 Apr 2025 16:32:29 GMT
• Title: Multiparameter estimation with an array of entangled atomic sensors
• Authors: Yifan Li, Lex Joosten, Youcef Baamara, Paolo Colciaghi, Alice Sinatra, Philipp Treutlein, Tilman Zibold,
• Abstract summary: entangled state of many-particle systems are investigated to enhance measurement precision of the most precise clocks and field sensors.<n>By splitting a spin-squeezed ensemble, we create an atomic sensor array featuring inter-sensor entanglement that can be flexibly configured to enhance measurement precision of multiple parameters jointly.
• Score: 1.9909997482325166
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In quantum metrology, entangled states of many-particle systems are investigated to enhance measurement precision of the most precise clocks and field sensors. While single-parameter quantum metrology is well established, many metrological tasks require joint multiparameter estimation, which poses new conceptual challenges that have so far only been explored theoretically. We experimentally demonstrate multiparameter quantum metrology with an array of entangled atomic ensembles. By splitting a spin-squeezed ensemble, we create an atomic sensor array featuring inter-sensor entanglement that can be flexibly configured to enhance measurement precision of multiple parameters jointly. Using an optimal estimation protocol, we achieve significant gains over the standard quantum limit in key multiparameter estimation tasks, thus grounding the concept of quantum enhancement of field sensor arrays and imaging devices.

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