Generation of many-body Bell correlations with short-range interactions in analog and digital quantum simulators

• URL: http://arxiv.org/abs/2603.17071v1
• Date: Tue, 17 Mar 2026 19:00:00 GMT
• Title: Generation of many-body Bell correlations with short-range interactions in analog and digital quantum simulators
• Abstract summary: Digital and analog quantum simulation platforms provide short-range or power-law couplings that decay too quickly for this purpose.<n>We show that two spin-$tfrac12$ chain models, a staggered nearest-neighbor XXX chain and a long-range XXZ chain, develop an effective OAT nonlinearity when projected onto the symmetric sector.<n>We confirm the accuracy of this mapping by comparing it to the exact dynamics and demonstrate that the generated correlations can be read out using a single probe qubit.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The dynamical generation of quantum resources, such as many-body entanglement or Bell correlations, can be achieved via one-axis twisting (OAT) dynamics, which require all-to-all couplings. However, current digital and analog quantum simulation platforms natively provide short-range or power-law couplings that decay too quickly for this purpose. We demonstrate that two spin-$\tfrac12$ chain models -- a staggered nearest-neighbor XXX chain and a long-range XXZ chain -- develop an effective OAT nonlinearity when projected onto the symmetric sector. We show that these dynamics generate metrologically useful spin-squeezed states and Greenberger-Horne-Zeilinger coherences that ensure violation of many-body Bell inequalities. We confirm the accuracy of this mapping by comparing it to the exact dynamics and demonstrate that the generated correlations can be read out using a single probe qubit. The resulting dynamics can be simulated with analog and digital quantum simulators

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