Artículo
Self-testing of a single quantum system from theory to experiment
Autor/es | Hu, Xiao-Min
Xie, Yi Arora, Atul Singh Ai, Ming-Zhong Bharti, Kishor Zhang, Jie Wu, Wei Chen, Ping Xing Cui, Jin Ming Liu, Bi-Heng Huang, Yun-Feng Li, Chuan-Feng Guo, Guang-Can Roland, Jérémie Cabello Quintero, Adán Kwek, Leong-Chuan |
Departamento | Universidad de Sevilla. Departamento de Física Aplicada II |
Fecha de publicación | 2023-10-19 |
Fecha de depósito | 2023-10-30 |
Publicado en |
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Resumen | Self-testing allows one to characterise quantum systems under minimal assumptions. However, existing schemes rely on quantum nonlocality and cannot be applied to systems that are not entangled. Here, we introduce a robust ... Self-testing allows one to characterise quantum systems under minimal assumptions. However, existing schemes rely on quantum nonlocality and cannot be applied to systems that are not entangled. Here, we introduce a robust method that achieves self-testing of individual systems by taking advantage of contextuality. The scheme is based on the simplest contextuality witness for the simplest contextual quantum system—the Klyachko-Can-Binicioğlu-Shumovsky inequality for the qutrit. We establish a lower bound on the fidelity of the state and the measurements as a function of the value of the witness under a pragmatic assumption on the measurements. We apply the method in an experiment on a single trapped 40Ca+ using randomly chosen measurements and perfect detection efficiency. Using the observed statistics, we obtain an experimental demonstration of self-testing of a single quantum system. |
Agencias financiadoras | National Natural Science Foundation of China Universidad de Sevilla European Commission (EC). Fondo Europeo de Desarrollo Regional (FEDER) Ministerio de Economia, Industria y Competitividad (MINECO). España Ministerio de Ciencia, Innovación y Universidades (MICINN). España Ministry of Education, Singapore National Research Foundation Singapore Department of Energy. United States Institute for Quantum Information and Matter Belgian Fonds pour la Formation à la Recherche |
Identificador del proyecto | 2017YFA0304100
2021YFE0113100 11734015 11874345 11821404 11904357 12174367 11904402 12074433 12174447 12004430 12174448 2021ZD0301200 2021ZD0301605 2022RC1194 2008085J02 US15097 PCI2019-111885-2 PID2020-113738GB-I00 OMA-2120757 DE-SC0020312 DE-SC0019040 DE-SC0019449 GBMF1250002 FA9550-18-1-0161 1.E.081.17F R.50.05.18.F |
Cita | Hu, X., Xie, Y., Arora, A.S., Ai, ., Bharti, K., Zhang, J.,...,Kwek, L. (2023). Self-testing of a single quantum system from theory to experiment. npj Quantum Information, 9 (103). https://doi.org/10.1038/s41534-023-00769-7. |
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