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Probing dynamical phase transitions with a superconducting quantum simulator
Nonequilibrium quantum many-body systems, which are difficult to study via classical computation, have attracted wide interest. Quantum simulation can provide insights into these problems. Here, using a programmable quantum simulator with 16 all-to-all connected superconducting qubits, we investigat...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7299620/ https://www.ncbi.nlm.nih.gov/pubmed/32596458 http://dx.doi.org/10.1126/sciadv.aba4935 |
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author | Xu, Kai Sun, Zheng-Hang Liu, Wuxin Zhang, Yu-Ran Li, Hekang Dong, Hang Ren, Wenhui Zhang, Pengfei Nori, Franco Zheng, Dongning Fan, Heng Wang, H. |
author_facet | Xu, Kai Sun, Zheng-Hang Liu, Wuxin Zhang, Yu-Ran Li, Hekang Dong, Hang Ren, Wenhui Zhang, Pengfei Nori, Franco Zheng, Dongning Fan, Heng Wang, H. |
author_sort | Xu, Kai |
collection | PubMed |
description | Nonequilibrium quantum many-body systems, which are difficult to study via classical computation, have attracted wide interest. Quantum simulation can provide insights into these problems. Here, using a programmable quantum simulator with 16 all-to-all connected superconducting qubits, we investigate the dynamical phase transition in the Lipkin-Meshkov-Glick model with a quenched transverse field. Clear signatures of dynamical phase transitions, merging different concepts of dynamical criticality, are observed by measuring the nonequilibrium order parameter, nonlocal correlations, and the Loschmidt echo. Moreover, near the dynamical critical point, we obtain a spin squeezing of −7.0 ± 0.8 dB, showing multipartite entanglement, useful for measurements with precision fivefold beyond the standard quantum limit. On the basis of the capability of entangling qubits simultaneously and the accurate single-shot readout of multiqubit states, this superconducting quantum simulator can be used to study other problems in nonequilibrium quantum many-body systems, such as thermalization, many-body localization, and emergent phenomena in periodically driven systems. |
format | Online Article Text |
id | pubmed-7299620 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-72996202020-06-25 Probing dynamical phase transitions with a superconducting quantum simulator Xu, Kai Sun, Zheng-Hang Liu, Wuxin Zhang, Yu-Ran Li, Hekang Dong, Hang Ren, Wenhui Zhang, Pengfei Nori, Franco Zheng, Dongning Fan, Heng Wang, H. Sci Adv Research Articles Nonequilibrium quantum many-body systems, which are difficult to study via classical computation, have attracted wide interest. Quantum simulation can provide insights into these problems. Here, using a programmable quantum simulator with 16 all-to-all connected superconducting qubits, we investigate the dynamical phase transition in the Lipkin-Meshkov-Glick model with a quenched transverse field. Clear signatures of dynamical phase transitions, merging different concepts of dynamical criticality, are observed by measuring the nonequilibrium order parameter, nonlocal correlations, and the Loschmidt echo. Moreover, near the dynamical critical point, we obtain a spin squeezing of −7.0 ± 0.8 dB, showing multipartite entanglement, useful for measurements with precision fivefold beyond the standard quantum limit. On the basis of the capability of entangling qubits simultaneously and the accurate single-shot readout of multiqubit states, this superconducting quantum simulator can be used to study other problems in nonequilibrium quantum many-body systems, such as thermalization, many-body localization, and emergent phenomena in periodically driven systems. American Association for the Advancement of Science 2020-06-17 /pmc/articles/PMC7299620/ /pubmed/32596458 http://dx.doi.org/10.1126/sciadv.aba4935 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
spellingShingle | Research Articles Xu, Kai Sun, Zheng-Hang Liu, Wuxin Zhang, Yu-Ran Li, Hekang Dong, Hang Ren, Wenhui Zhang, Pengfei Nori, Franco Zheng, Dongning Fan, Heng Wang, H. Probing dynamical phase transitions with a superconducting quantum simulator |
title | Probing dynamical phase transitions with a superconducting quantum simulator |
title_full | Probing dynamical phase transitions with a superconducting quantum simulator |
title_fullStr | Probing dynamical phase transitions with a superconducting quantum simulator |
title_full_unstemmed | Probing dynamical phase transitions with a superconducting quantum simulator |
title_short | Probing dynamical phase transitions with a superconducting quantum simulator |
title_sort | probing dynamical phase transitions with a superconducting quantum simulator |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7299620/ https://www.ncbi.nlm.nih.gov/pubmed/32596458 http://dx.doi.org/10.1126/sciadv.aba4935 |
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