Generation and read-out of many-body Bell correlations with a probe qubit

• URL: http://arxiv.org/abs/2511.01962v1
• Date: Mon, 03 Nov 2025 19:00:00 GMT
• Title: Generation and read-out of many-body Bell correlations with a probe qubit
• Authors: Marcin Płodzień, Jan Chwedeńczuk,
• Abstract summary: We introduce a simple and versatile method for creating and certifying entanglement and many-body Bell correlations.<n>This method relies on a single qubit interacting with an $N$-qubit system.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: As demand for quantum technologies increases, so does the need to generate and classify non-classical correlations in complex many-body systems. We introduce a simple and versatile method for creating and certifying entanglement and many-body Bell correlations. This method relies on a single qubit interacting with an $N$-qubit system. We demonstrate that: (i) such pairwise interaction is sufficient to induce many-body quantum correlations, and (ii) the qubit can serve as a probe to extract all information about these correlations. Thus, single-qubit measurements reveal multi-partite entanglement and $N$-body Bell correlations, enabling the rapid and efficient certification of non-classicality in complex systems.

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