Continuous-variable nonclassicality certification under coarse-grained measurement
Coarse graining is a common imperfection of realistic quantum measurement, obstructing the direct observation of quantum features. Under highly coarse-grained measurement, we experimentally certify the continuous-variable nonclassicality of both Gaussian and non-Gaussian states. Remarkably, we find...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2023-10-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.5.043057 |
| _version_ | 1797210351646801920 |
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| author | Chan Roh Young-Do Yoon Jiyong Park Young-Sik Ra |
| author_facet | Chan Roh Young-Do Yoon Jiyong Park Young-Sik Ra |
| author_sort | Chan Roh |
| collection | DOAJ |
| description | Coarse graining is a common imperfection of realistic quantum measurement, obstructing the direct observation of quantum features. Under highly coarse-grained measurement, we experimentally certify the continuous-variable nonclassicality of both Gaussian and non-Gaussian states. Remarkably, we find that this coarse-grained measurement outperforms the conventional fine-grained measurement for nonclassicality certification: it detects nonclassicality beyond the reach of the variance criterion, and furthermore, it exhibits stronger statistical significance than the high-order moments method. Our work demonstrates the usefulness of coarse-grained measurement by providing a reliable and efficient way of nonclassicality certification for quantum technologies. |
| first_indexed | 2024-04-24T10:09:13Z |
| format | Article |
| id | doaj.art-078fa1b21f5a48caba4268dee968b064 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:09:13Z |
| publishDate | 2023-10-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-078fa1b21f5a48caba4268dee968b0642024-04-12T17:35:09ZengAmerican Physical SocietyPhysical Review Research2643-15642023-10-015404305710.1103/PhysRevResearch.5.043057Continuous-variable nonclassicality certification under coarse-grained measurementChan RohYoung-Do YoonJiyong ParkYoung-Sik RaCoarse graining is a common imperfection of realistic quantum measurement, obstructing the direct observation of quantum features. Under highly coarse-grained measurement, we experimentally certify the continuous-variable nonclassicality of both Gaussian and non-Gaussian states. Remarkably, we find that this coarse-grained measurement outperforms the conventional fine-grained measurement for nonclassicality certification: it detects nonclassicality beyond the reach of the variance criterion, and furthermore, it exhibits stronger statistical significance than the high-order moments method. Our work demonstrates the usefulness of coarse-grained measurement by providing a reliable and efficient way of nonclassicality certification for quantum technologies.http://doi.org/10.1103/PhysRevResearch.5.043057 |
| spellingShingle | Chan Roh Young-Do Yoon Jiyong Park Young-Sik Ra Continuous-variable nonclassicality certification under coarse-grained measurement Physical Review Research |
| title | Continuous-variable nonclassicality certification under coarse-grained measurement |
| title_full | Continuous-variable nonclassicality certification under coarse-grained measurement |
| title_fullStr | Continuous-variable nonclassicality certification under coarse-grained measurement |
| title_full_unstemmed | Continuous-variable nonclassicality certification under coarse-grained measurement |
| title_short | Continuous-variable nonclassicality certification under coarse-grained measurement |
| title_sort | continuous variable nonclassicality certification under coarse grained measurement |
| url | http://doi.org/10.1103/PhysRevResearch.5.043057 |
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