Experimental high-dimensional multi-qubit Bell non-locality on a superconducting quantum processor
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866908995840638976 |
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| author | Mafi, Yousef Moghaddam, Ali G. Ojanen, Teemu |
| author_facet | Mafi, Yousef Moghaddam, Ali G. Ojanen, Teemu |
| contents | Combining recent advances in superconducting quantum hardware, we explore quantum correlations in a previously inaccessible regime by observing \emph{simultaneously} high-dimensional and many-body Bell non-locality. We report a high-confidence Bell violation in the correlations between two $d=64$-dimensional systems encoded in twelve qubits. For system sizes up to $d=32$, the strength of the observed nonlocal correlations exceeds the quantum upper bound for $d=2$ systems, providing direct evidence of high-dimensional nonlocality. Furthermore, we demonstrate that the observed violation is genuinely collective: all qubits contribute to the nonlocal correlations, while most pairwise correlations across the bipartition remain Bell-local. Our work illustrates how present-day quantum processors enable the exploration of fundamental predictions of quantum mechanics in previously inaccessible regimes and, in turn, how fundamental quantum effects can be used to benchmark their performance. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_24740 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Experimental high-dimensional multi-qubit Bell non-locality on a superconducting quantum processor Mafi, Yousef Moghaddam, Ali G. Ojanen, Teemu Quantum Physics Statistical Mechanics Computational Physics Combining recent advances in superconducting quantum hardware, we explore quantum correlations in a previously inaccessible regime by observing \emph{simultaneously} high-dimensional and many-body Bell non-locality. We report a high-confidence Bell violation in the correlations between two $d=64$-dimensional systems encoded in twelve qubits. For system sizes up to $d=32$, the strength of the observed nonlocal correlations exceeds the quantum upper bound for $d=2$ systems, providing direct evidence of high-dimensional nonlocality. Furthermore, we demonstrate that the observed violation is genuinely collective: all qubits contribute to the nonlocal correlations, while most pairwise correlations across the bipartition remain Bell-local. Our work illustrates how present-day quantum processors enable the exploration of fundamental predictions of quantum mechanics in previously inaccessible regimes and, in turn, how fundamental quantum effects can be used to benchmark their performance. |
| title | Experimental high-dimensional multi-qubit Bell non-locality on a superconducting quantum processor |
| topic | Quantum Physics Statistical Mechanics Computational Physics |
| url | https://arxiv.org/abs/2604.24740 |