Snapshotting quantum dynamics at multiple time points
Abstract Measurement-induced state disturbance is a major challenge in obtaining quantum statistics at multiple time points. We propose a method to extract dynamic information from a quantum system at intermediate time points, namely snapshotting quantum dynamics. To this end, we apply classical pos...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-10-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-53051-5 |
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| author | Pengfei Wang Hyukjoon Kwon Chun-Yang Luan Wentao Chen Mu Qiao Zinan Zhou Kaizhao Wang M. S. Kim Kihwan Kim |
| author_facet | Pengfei Wang Hyukjoon Kwon Chun-Yang Luan Wentao Chen Mu Qiao Zinan Zhou Kaizhao Wang M. S. Kim Kihwan Kim |
| author_sort | Pengfei Wang |
| collection | DOAJ |
| description | Abstract Measurement-induced state disturbance is a major challenge in obtaining quantum statistics at multiple time points. We propose a method to extract dynamic information from a quantum system at intermediate time points, namely snapshotting quantum dynamics. To this end, we apply classical post-processing after performing the ancilla-assisted measurements to cancel out the impact of the measurements at each time point. Based on this, we reconstruct a multi-time quasi-probability distribution (QPD) that correctly recovers the probability distributions at the respective time points. Our approach can also be applied to simultaneously extract exponentially many correlation functions with various time-orderings. We provide a proof-of-principle experimental demonstration of the proposed protocol using a dual-species trapped-ion system by employing 171Yb+ and 138Ba+ ions as the system and the ancilla, respectively. Multi-time measurements are performed by repeated initialization and detection of the ancilla state without directly measuring the system state. The two- and three-time QPDs and correlation functions are reconstructed reliably from the experiment, negativity and complex values in the QPDs clearly indicate a contribution of the quantum coherence throughout dynamics. |
| format | Article |
| id | doaj-art-23c70b19f98148cf8eed25d19765d1cb |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-23c70b19f98148cf8eed25d19765d1cb2025-01-19T12:29:37ZengNature PortfolioNature Communications2041-17232024-10-0115111310.1038/s41467-024-53051-5Snapshotting quantum dynamics at multiple time pointsPengfei Wang0Hyukjoon Kwon1Chun-Yang Luan2Wentao Chen3Mu Qiao4Zinan Zhou5Kaizhao Wang6M. S. Kim7Kihwan Kim8Beijing Academy of Quantum Information SciencesKorea Institute for Advanced StudyState Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua UniversityState Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua UniversityState Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua UniversityState Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua UniversityState Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua UniversityKorea Institute for Advanced StudyBeijing Academy of Quantum Information SciencesAbstract Measurement-induced state disturbance is a major challenge in obtaining quantum statistics at multiple time points. We propose a method to extract dynamic information from a quantum system at intermediate time points, namely snapshotting quantum dynamics. To this end, we apply classical post-processing after performing the ancilla-assisted measurements to cancel out the impact of the measurements at each time point. Based on this, we reconstruct a multi-time quasi-probability distribution (QPD) that correctly recovers the probability distributions at the respective time points. Our approach can also be applied to simultaneously extract exponentially many correlation functions with various time-orderings. We provide a proof-of-principle experimental demonstration of the proposed protocol using a dual-species trapped-ion system by employing 171Yb+ and 138Ba+ ions as the system and the ancilla, respectively. Multi-time measurements are performed by repeated initialization and detection of the ancilla state without directly measuring the system state. The two- and three-time QPDs and correlation functions are reconstructed reliably from the experiment, negativity and complex values in the QPDs clearly indicate a contribution of the quantum coherence throughout dynamics.https://doi.org/10.1038/s41467-024-53051-5 |
| spellingShingle | Pengfei Wang Hyukjoon Kwon Chun-Yang Luan Wentao Chen Mu Qiao Zinan Zhou Kaizhao Wang M. S. Kim Kihwan Kim Snapshotting quantum dynamics at multiple time points Nature Communications |
| title | Snapshotting quantum dynamics at multiple time points |
| title_full | Snapshotting quantum dynamics at multiple time points |
| title_fullStr | Snapshotting quantum dynamics at multiple time points |
| title_full_unstemmed | Snapshotting quantum dynamics at multiple time points |
| title_short | Snapshotting quantum dynamics at multiple time points |
| title_sort | snapshotting quantum dynamics at multiple time points |
| url | https://doi.org/10.1038/s41467-024-53051-5 |
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