Arbitrary coherent distributions in a programmable quantum walk
The coherent superposition of position states in a quantum walk (QW) can be precisely engineered towards the desired distributions to meet the need of quantum information applications. The coherent distribution can make full use of quantum parallel in computation and simulation. Particularly, the un...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2022-04-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.4.023042 |
| _version_ | 1797210829233324032 |
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| author | Rong Zhang Ran Yang Jian Guo Chang-Wei Sun Yi-Chen Liu Heng Zhou Ping Xu Zhenda Xie Yan-Xiao Gong Shi-Ning Zhu |
| author_facet | Rong Zhang Ran Yang Jian Guo Chang-Wei Sun Yi-Chen Liu Heng Zhou Ping Xu Zhenda Xie Yan-Xiao Gong Shi-Ning Zhu |
| author_sort | Rong Zhang |
| collection | DOAJ |
| description | The coherent superposition of position states in a quantum walk (QW) can be precisely engineered towards the desired distributions to meet the need of quantum information applications. The coherent distribution can make full use of quantum parallel in computation and simulation. Particularly, the uniform superposition provides the robust nonlocality, which has wide applications such as the generation of genuine multibit random numbers without postprocessing. We experimentally demonstrate that the rich dynamics featured with arbitrary coherent distributions can be obtained by introducing different sets of the time- and position-dependent operations. Such a QW is realized by a resource-constant and flexible optical circuit, in which the variable operation is executed based on a Sagnac interferometer in an intrinsically stable and precisely controlled way. Our results contribute to the practical realization of quantum-walk-based quantum computation, quantum simulations, and quantum information protocols. |
| first_indexed | 2024-04-24T10:16:48Z |
| format | Article |
| id | doaj.art-f3f9130d65e440429c9741d156eca774 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:16:48Z |
| publishDate | 2022-04-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-f3f9130d65e440429c9741d156eca7742024-04-12T17:19:56ZengAmerican Physical SocietyPhysical Review Research2643-15642022-04-014202304210.1103/PhysRevResearch.4.023042Arbitrary coherent distributions in a programmable quantum walkRong ZhangRan YangJian GuoChang-Wei SunYi-Chen LiuHeng ZhouPing XuZhenda XieYan-Xiao GongShi-Ning ZhuThe coherent superposition of position states in a quantum walk (QW) can be precisely engineered towards the desired distributions to meet the need of quantum information applications. The coherent distribution can make full use of quantum parallel in computation and simulation. Particularly, the uniform superposition provides the robust nonlocality, which has wide applications such as the generation of genuine multibit random numbers without postprocessing. We experimentally demonstrate that the rich dynamics featured with arbitrary coherent distributions can be obtained by introducing different sets of the time- and position-dependent operations. Such a QW is realized by a resource-constant and flexible optical circuit, in which the variable operation is executed based on a Sagnac interferometer in an intrinsically stable and precisely controlled way. Our results contribute to the practical realization of quantum-walk-based quantum computation, quantum simulations, and quantum information protocols.http://doi.org/10.1103/PhysRevResearch.4.023042 |
| spellingShingle | Rong Zhang Ran Yang Jian Guo Chang-Wei Sun Yi-Chen Liu Heng Zhou Ping Xu Zhenda Xie Yan-Xiao Gong Shi-Ning Zhu Arbitrary coherent distributions in a programmable quantum walk Physical Review Research |
| title | Arbitrary coherent distributions in a programmable quantum walk |
| title_full | Arbitrary coherent distributions in a programmable quantum walk |
| title_fullStr | Arbitrary coherent distributions in a programmable quantum walk |
| title_full_unstemmed | Arbitrary coherent distributions in a programmable quantum walk |
| title_short | Arbitrary coherent distributions in a programmable quantum walk |
| title_sort | arbitrary coherent distributions in a programmable quantum walk |
| url | http://doi.org/10.1103/PhysRevResearch.4.023042 |
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