Entangled states from sparsely coupled spins for metrology with neutral atoms

• URL: http://arxiv.org/abs/2412.10010v1
• Date: Fri, 13 Dec 2024 09:53:56 GMT
• Title: Entangled states from sparsely coupled spins for metrology with neutral atoms
• Authors: Sridevi Kuriyattil, Pablo M. Poggi, Jonathan D. Pritchard, Johannes Kombe, Andrew J. Daley,
• Abstract summary: We show that optimal states for quantum sensing can be generated with sparse interaction graphs featuring only a logarithmic number of couplings per particle. The resulting sparse coupling graphs and protocol can also be efficiently implemented using dynamic reconfiguration of atoms in optical tweezers.
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• Abstract: Quantum states featuring extensive multipartite entanglement are a resource for quantum-enhanced metrology, with sensitivity up to the Heisenberg limit. However, robust generation of these states using unitary dynamics typically requires all-to-all interactions among particles. Here, we demonstrate that optimal states for quantum sensing can be generated with sparse interaction graphs featuring only a logarithmic number of couplings per particle. We show that specific sparse graphs with long-range interactions can approximate the dynamics of all-to-all spin models, such as the one-axis twisting model, even for large system sizes. The resulting sparse coupling graphs and protocol can also be efficiently implemented using dynamic reconfiguration of atoms in optical tweezers.

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