Nonlocality in quantum cloning states
Abstract This study investigates the nonlocality characteristics of output states produced by a universal quantum cloning machine, with particular emphasis on the Bell-CHSH inequality violations exhibited by the two-qubit reduced states of cloned outputs. Through systematic analysis, we identify the...
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| Format: | Article |
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Nature Portfolio
2025-07-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-06140-4 |
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| author | Jun Liu Zhiwen Mo |
| author_facet | Jun Liu Zhiwen Mo |
| author_sort | Jun Liu |
| collection | DOAJ |
| description | Abstract This study investigates the nonlocality characteristics of output states produced by a universal quantum cloning machine, with particular emphasis on the Bell-CHSH inequality violations exhibited by the two-qubit reduced states of cloned outputs. Through systematic analysis, we identify the parameter regimes where these reduced states can effectively serve as quantum channels for teleportation protocols. Our results demonstrate that within specific operational ranges of the cloning machine parameters, the two-qubit reduced states are suitable for quantum teleportation but do not exhibit violations of Bell-CHSH inequalities. Furthermore, we quantitatively characterize the monogamy relations governing Bell-CHSH violations in quantum cloning states across different parameter configurations, revealing fundamental constraints on nonlocality distribution in cloned quantum systems. |
| format | Article |
| id | doaj-art-cc2c9c87bf254e0082f1c96b1255cc63 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-cc2c9c87bf254e0082f1c96b1255cc632025-08-20T04:01:34ZengNature PortfolioScientific Reports2045-23222025-07-011511810.1038/s41598-025-06140-4Nonlocality in quantum cloning statesJun Liu0Zhiwen Mo1School of Mathematics and Information, China West Normal UniversitySchool of Mathematical Sciences, Sichuan Normal UniversityAbstract This study investigates the nonlocality characteristics of output states produced by a universal quantum cloning machine, with particular emphasis on the Bell-CHSH inequality violations exhibited by the two-qubit reduced states of cloned outputs. Through systematic analysis, we identify the parameter regimes where these reduced states can effectively serve as quantum channels for teleportation protocols. Our results demonstrate that within specific operational ranges of the cloning machine parameters, the two-qubit reduced states are suitable for quantum teleportation but do not exhibit violations of Bell-CHSH inequalities. Furthermore, we quantitatively characterize the monogamy relations governing Bell-CHSH violations in quantum cloning states across different parameter configurations, revealing fundamental constraints on nonlocality distribution in cloned quantum systems.https://doi.org/10.1038/s41598-025-06140-4NonlocalityQuantum teleportationBell-CHSH inequality |
| spellingShingle | Jun Liu Zhiwen Mo Nonlocality in quantum cloning states Scientific Reports Nonlocality Quantum teleportation Bell-CHSH inequality |
| title | Nonlocality in quantum cloning states |
| title_full | Nonlocality in quantum cloning states |
| title_fullStr | Nonlocality in quantum cloning states |
| title_full_unstemmed | Nonlocality in quantum cloning states |
| title_short | Nonlocality in quantum cloning states |
| title_sort | nonlocality in quantum cloning states |
| topic | Nonlocality Quantum teleportation Bell-CHSH inequality |
| url | https://doi.org/10.1038/s41598-025-06140-4 |
| work_keys_str_mv | AT junliu nonlocalityinquantumcloningstates AT zhiwenmo nonlocalityinquantumcloningstates |