Generation and read-out of many-body Bell correlations with a probe qubit
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908902484869120 |
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| author | Płodzień, Marcin Chwedeńczuk, Jan |
| author_facet | Płodzień, Marcin Chwedeńczuk, Jan |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_01962 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Generation and read-out of many-body Bell correlations with a probe qubit Płodzień, Marcin Chwedeńczuk, Jan Quantum Physics 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. |
| title | Generation and read-out of many-body Bell correlations with a probe qubit |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2511.01962 |