Verification of a resetting protocol for an uncontrolled superconducting qubit

Abstract Quantum resetting protocols allow a quantum system to be sent to a state in the past by making it interact with quantum probes when neither the free evolution of the system nor the interaction is controlled. We experimentally verify the simplest non-trivial case of a quantum resetting proto...

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Autores principales:	Ming Gong, Feihu Xu, Zheng-Da Li, Zizhu Wang, Yu-Zhe Zhang, Yulin Wu, Shaowei Li, Youwei Zhao, Shiyu Wang, Chen Zha, Hui Deng, Zhiguang Yan, Hao Rong, Futian Liang, Jin Lin, Yu Xu, Cheng Guo, Lihua Sun, Anthony D. Castellano, Cheng-Zhi Peng, Yu-Ao Chen, Xiaobo Zhu, Jian-Wei Pan
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/f9524351835f42eb9e508815e9074d96
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spelling	oai:doaj.org-article:f9524351835f42eb9e508815e9074d962021-12-02T15:10:33ZVerification of a resetting protocol for an uncontrolled superconducting qubit10.1038/s41534-020-00329-32056-6387https://doaj.org/article/f9524351835f42eb9e508815e9074d962020-12-01T00:00:00Zhttps://doi.org/10.1038/s41534-020-00329-3https://doaj.org/toc/2056-6387Abstract Quantum resetting protocols allow a quantum system to be sent to a state in the past by making it interact with quantum probes when neither the free evolution of the system nor the interaction is controlled. We experimentally verify the simplest non-trivial case of a quantum resetting protocol, known as the $${{\mathcal{W}}}_{4}$$ W 4 protocol, with five superconducting qubits, testing it with different types of free evolutions and target–probe interactions. After projection, we obtained a reset state fidelity as high as 0.951, and the process fidelity was found to be 0.792. We also implemented 100 randomly chosen interactions and demonstrated an average success probability of 0.323 for $$\left\|1\right\rangle$$ 1 and 0.292 for $$\left\|-\right\rangle$$ − , and experimentally confirmed the nonzero probability of success for unknown interactions; the numerical simulated values are about 0.3. Our experiment shows that the simplest quantum resetting protocol can be implemented with current technologies, making such protocols a valuable tool in the eternal fight against unwanted evolution in quantum systems.Ming GongFeihu XuZheng-Da LiZizhu WangYu-Zhe ZhangYulin WuShaowei LiYouwei ZhaoShiyu WangChen ZhaHui DengZhiguang YanHao RongFutian LiangJin LinYu XuCheng GuoLihua SunAnthony D. CastellanoCheng-Zhi PengYu-Ao ChenXiaobo ZhuJian-Wei PanNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 6, Iss 1, Pp 1-9 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 Ming Gong Feihu Xu Zheng-Da Li Zizhu Wang Yu-Zhe Zhang Yulin Wu Shaowei Li Youwei Zhao Shiyu Wang Chen Zha Hui Deng Zhiguang Yan Hao Rong Futian Liang Jin Lin Yu Xu Cheng Guo Lihua Sun Anthony D. Castellano Cheng-Zhi Peng Yu-Ao Chen Xiaobo Zhu Jian-Wei Pan Verification of a resetting protocol for an uncontrolled superconducting qubit
description	Abstract Quantum resetting protocols allow a quantum system to be sent to a state in the past by making it interact with quantum probes when neither the free evolution of the system nor the interaction is controlled. We experimentally verify the simplest non-trivial case of a quantum resetting protocol, known as the $${{\mathcal{W}}}_{4}$$ W 4 protocol, with five superconducting qubits, testing it with different types of free evolutions and target–probe interactions. After projection, we obtained a reset state fidelity as high as 0.951, and the process fidelity was found to be 0.792. We also implemented 100 randomly chosen interactions and demonstrated an average success probability of 0.323 for $$\left\|1\right\rangle$$ 1 and 0.292 for $$\left\|-\right\rangle$$ − , and experimentally confirmed the nonzero probability of success for unknown interactions; the numerical simulated values are about 0.3. Our experiment shows that the simplest quantum resetting protocol can be implemented with current technologies, making such protocols a valuable tool in the eternal fight against unwanted evolution in quantum systems.
format	article
author	Ming Gong Feihu Xu Zheng-Da Li Zizhu Wang Yu-Zhe Zhang Yulin Wu Shaowei Li Youwei Zhao Shiyu Wang Chen Zha Hui Deng Zhiguang Yan Hao Rong Futian Liang Jin Lin Yu Xu Cheng Guo Lihua Sun Anthony D. Castellano Cheng-Zhi Peng Yu-Ao Chen Xiaobo Zhu Jian-Wei Pan
author_facet	Ming Gong Feihu Xu Zheng-Da Li Zizhu Wang Yu-Zhe Zhang Yulin Wu Shaowei Li Youwei Zhao Shiyu Wang Chen Zha Hui Deng Zhiguang Yan Hao Rong Futian Liang Jin Lin Yu Xu Cheng Guo Lihua Sun Anthony D. Castellano Cheng-Zhi Peng Yu-Ao Chen Xiaobo Zhu Jian-Wei Pan
author_sort	Ming Gong
title	Verification of a resetting protocol for an uncontrolled superconducting qubit
title_short	Verification of a resetting protocol for an uncontrolled superconducting qubit
title_full	Verification of a resetting protocol for an uncontrolled superconducting qubit
title_fullStr	Verification of a resetting protocol for an uncontrolled superconducting qubit
title_full_unstemmed	Verification of a resetting protocol for an uncontrolled superconducting qubit
title_sort	verification of a resetting protocol for an uncontrolled superconducting qubit
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/f9524351835f42eb9e508815e9074d96
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Verification of a resetting protocol for an uncontrolled superconducting qubit

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