Experimental demonstration of input-output indefiniteness in a single quantum device
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2022
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| _version_ | 1866929334174875648 |
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| author | Guo, Yu Liu, Zixuan Tang, Hao Hu, Xiao-Min Liu, Bi-Heng Huang, Yun-Feng Li, Chuan-Feng Guo, Guang-Can Chiribella, Giulio |
| author_facet | Guo, Yu Liu, Zixuan Tang, Hao Hu, Xiao-Min Liu, Bi-Heng Huang, Yun-Feng Li, Chuan-Feng Guo, Guang-Can Chiribella, Giulio |
| contents | Quantum theory allows information to flow through a single device in a coherent superposition of two opposite directions, resulting into situations where the input-output direction is indefinite. Here we introduce a theoretical method to witness input-output indefiniteness in a single quantum device, and we experimentally demonstrate it by constructing a photonic setup that exhibits input-output indefiniteness with a statistical significance exceeding 69 standard deviations. Our results provide a way to characterize input-output indefiniteness as a resource for quantum information and photonic quantum technologies and enable table-top simulations of hypothetical scenarios exhibiting quantum indefiniteness in the direction of time. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2210_17046 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Experimental demonstration of input-output indefiniteness in a single quantum device Guo, Yu Liu, Zixuan Tang, Hao Hu, Xiao-Min Liu, Bi-Heng Huang, Yun-Feng Li, Chuan-Feng Guo, Guang-Can Chiribella, Giulio Quantum Physics Quantum theory allows information to flow through a single device in a coherent superposition of two opposite directions, resulting into situations where the input-output direction is indefinite. Here we introduce a theoretical method to witness input-output indefiniteness in a single quantum device, and we experimentally demonstrate it by constructing a photonic setup that exhibits input-output indefiniteness with a statistical significance exceeding 69 standard deviations. Our results provide a way to characterize input-output indefiniteness as a resource for quantum information and photonic quantum technologies and enable table-top simulations of hypothetical scenarios exhibiting quantum indefiniteness in the direction of time. |
| title | Experimental demonstration of input-output indefiniteness in a single quantum device |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2210.17046 |