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Quantum Foundations

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

arXiv

Authors: Marcin Płodzień, Jan Chwedeńczuk

Year

2025

Paper ID

17692

Status

Preprint

Abstract Read

~2 min

Abstract Words

101

Citations

N/A

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.

Why This Paper Matters

This paper contributes to the Quantum Foundations research area in the Quantum Articles archive.
It adds a 2025 reference point for readers tracking recent quantum research.
As demand for quantum technologies increases, so does the need to generate and classify non-classical correlations in complex many-body systems.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2511.01962 [2] arXiv https://arxiv.org/abs/2511.01962 [3] Publisher https://arxiv.org/abs/2511.01962

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