Quantum-Enhanced Sensing Enabled by Scrambling-Induced Genuine Multipartite Entanglement
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866909024430063616 |
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| author | Hu, Guantian Zhang, Wenxuan Chen, Zhihua Zhong, Liuzhu Zhao, Jingchao Liu, Chilong Liu, Zixing Xu, Yue Lin, Yongchang Ri, Yougui Xie, Guixu Liu, Mingze Yuan, Haolan Zhou, Yuxuan Zhang, Yu Hu, Chang-Kang Liu, Song Tan, Dian Yu, Dapeng |
| author_facet | Hu, Guantian Zhang, Wenxuan Chen, Zhihua Zhong, Liuzhu Zhao, Jingchao Liu, Chilong Liu, Zixing Xu, Yue Lin, Yongchang Ri, Yougui Xie, Guixu Liu, Mingze Yuan, Haolan Zhou, Yuxuan Zhang, Yu Hu, Chang-Kang Liu, Song Tan, Dian Yu, Dapeng |
| contents | Quantum sensing leverages quantum resources to surpass the standard quantum limit, yet many existing protocols rely on the preparation of complex entangled states and Hamiltonian engineering, posing challenges for universality and scalability. Here, we report an experimental realization of a universal protocol, known as Butterfly Metrology, proposed in [arXiv:2411.12794], demonstrating a scrambling-based approach for quantum-enhanced sensing on a superconducting quantum processor. By exploiting many-body information scrambling, we observe quantum-enhanced sensitivity to an encoded phase beyond the standard quantum limit, with a scaling consistent with a factor-of-two of the Heisenberg limit for system sizes of up to 10 qubits. Importantly, we experimentally establish a connection between the enhanced sensitivity and the dynamics of the out-of-time-order correlator (OTOC), and show that the buildup of scrambling-induced genuine multipartite entanglement underlies the observed sensitivity enhancement. Our results demonstrate a scalable and practical approach for quantum-enhanced sensing in interacting many-body quantum systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_22503 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Quantum-Enhanced Sensing Enabled by Scrambling-Induced Genuine Multipartite Entanglement Hu, Guantian Zhang, Wenxuan Chen, Zhihua Zhong, Liuzhu Zhao, Jingchao Liu, Chilong Liu, Zixing Xu, Yue Lin, Yongchang Ri, Yougui Xie, Guixu Liu, Mingze Yuan, Haolan Zhou, Yuxuan Zhang, Yu Hu, Chang-Kang Liu, Song Tan, Dian Yu, Dapeng Quantum Physics Quantum sensing leverages quantum resources to surpass the standard quantum limit, yet many existing protocols rely on the preparation of complex entangled states and Hamiltonian engineering, posing challenges for universality and scalability. Here, we report an experimental realization of a universal protocol, known as Butterfly Metrology, proposed in [arXiv:2411.12794], demonstrating a scrambling-based approach for quantum-enhanced sensing on a superconducting quantum processor. By exploiting many-body information scrambling, we observe quantum-enhanced sensitivity to an encoded phase beyond the standard quantum limit, with a scaling consistent with a factor-of-two of the Heisenberg limit for system sizes of up to 10 qubits. Importantly, we experimentally establish a connection between the enhanced sensitivity and the dynamics of the out-of-time-order correlator (OTOC), and show that the buildup of scrambling-induced genuine multipartite entanglement underlies the observed sensitivity enhancement. Our results demonstrate a scalable and practical approach for quantum-enhanced sensing in interacting many-body quantum systems. |
| title | Quantum-Enhanced Sensing Enabled by Scrambling-Induced Genuine Multipartite Entanglement |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2601.22503 |