Enhanced quantum hypothesis testing via the interplay between coherent evolution and noises
Abstract Previous studies in quantum information have recognized that specific types of noise can encode information in certain applications. However, the role of noise in quantum hypothesis testing, traditionally assumed to undermine performance, has not been thoroughly explored. Our study provides...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-01-01
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| Series: | Communications Physics |
| Online Access: | https://doi.org/10.1038/s42005-024-01923-z |
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| _version_ | 1832594681767133184 |
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| author | Qing Li Lingna Wang Min Jiang Ze Wu Haidong Yuan Xinhua Peng |
| author_facet | Qing Li Lingna Wang Min Jiang Ze Wu Haidong Yuan Xinhua Peng |
| author_sort | Qing Li |
| collection | DOAJ |
| description | Abstract Previous studies in quantum information have recognized that specific types of noise can encode information in certain applications. However, the role of noise in quantum hypothesis testing, traditionally assumed to undermine performance, has not been thoroughly explored. Our study provides sufficient conditions for general noisy dynamics to surpass noiseless (unitary) dynamics within certain time interval. We then design and experimentally implement a noise-assisted quantum hypothesis testing protocol on ultralow-field nuclear magnetic resonance systems, which demonstrates that the success probability under certain noisy dynamics can indeed surpass the ceiling set by unitary evolution. Moreover, we show that in cases where noise initially hampers performance, strategic application of coherent controls on the system can transform those previously detrimental noises into advantageous ones. Our results, both theoretical and experimental, demonstrates the potential to leveraging noise in quantum hypothesis testing, which pushes the boundaries of quantum hypothesis testing and general quantum information processing. |
| format | Article |
| id | doaj-art-38684c9ea70f46fcb411149e162a690a |
| institution | Kabale University |
| issn | 2399-3650 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Physics |
| spelling | doaj-art-38684c9ea70f46fcb411149e162a690a2025-01-19T12:26:19ZengNature PortfolioCommunications Physics2399-36502025-01-01811710.1038/s42005-024-01923-zEnhanced quantum hypothesis testing via the interplay between coherent evolution and noisesQing Li0Lingna Wang1Min Jiang2Ze Wu3Haidong Yuan4Xinhua Peng5CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences, University of Science and Technology of ChinaDepartment of Mechanical and Automation Engineering, The Chinese University of Hong KongCAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences, University of Science and Technology of ChinaCAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences, University of Science and Technology of ChinaDepartment of Mechanical and Automation Engineering, The Chinese University of Hong KongCAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences, University of Science and Technology of ChinaAbstract Previous studies in quantum information have recognized that specific types of noise can encode information in certain applications. However, the role of noise in quantum hypothesis testing, traditionally assumed to undermine performance, has not been thoroughly explored. Our study provides sufficient conditions for general noisy dynamics to surpass noiseless (unitary) dynamics within certain time interval. We then design and experimentally implement a noise-assisted quantum hypothesis testing protocol on ultralow-field nuclear magnetic resonance systems, which demonstrates that the success probability under certain noisy dynamics can indeed surpass the ceiling set by unitary evolution. Moreover, we show that in cases where noise initially hampers performance, strategic application of coherent controls on the system can transform those previously detrimental noises into advantageous ones. Our results, both theoretical and experimental, demonstrates the potential to leveraging noise in quantum hypothesis testing, which pushes the boundaries of quantum hypothesis testing and general quantum information processing.https://doi.org/10.1038/s42005-024-01923-z |
| spellingShingle | Qing Li Lingna Wang Min Jiang Ze Wu Haidong Yuan Xinhua Peng Enhanced quantum hypothesis testing via the interplay between coherent evolution and noises Communications Physics |
| title | Enhanced quantum hypothesis testing via the interplay between coherent evolution and noises |
| title_full | Enhanced quantum hypothesis testing via the interplay between coherent evolution and noises |
| title_fullStr | Enhanced quantum hypothesis testing via the interplay between coherent evolution and noises |
| title_full_unstemmed | Enhanced quantum hypothesis testing via the interplay between coherent evolution and noises |
| title_short | Enhanced quantum hypothesis testing via the interplay between coherent evolution and noises |
| title_sort | enhanced quantum hypothesis testing via the interplay between coherent evolution and noises |
| url | https://doi.org/10.1038/s42005-024-01923-z |
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