Quantum State Preparation by Improved MPS Method
Fuente:
arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866916905288204288 |
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| author | Wang, Chao Zhou, Pengrui Zhuang, Xi-Ning Cui, Ziwei Dou, Menghan Chen, Zhao-Yun Guo, Guo-Ping |
| author_facet | Wang, Chao Zhou, Pengrui Zhuang, Xi-Ning Cui, Ziwei Dou, Menghan Chen, Zhao-Yun Guo, Guo-Ping |
| contents | Efficient encoding of classical information plays a fundamental role in numerous practical quantum algorithms. However, the preparation of an arbitrary amplitude-encoded state has been proven to be time-consuming, and its deployment on current noisy devices can be challenging. In this work, we propose an improved Matrix Product State(MPS) method preparation protocol with an exponential reduction on the circuit depth, as well as topological adaptability. By refined utilization of the disentangling principle, we also reduce approximately 33% two-qubit gate count. To validate our method, we study various families of functions and distributions with provably bounded MPS rank. Numerical experiments show that our method significantly reduces circuit depth while achieving higher fidelity for states arising in financial and other applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_12821 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum State Preparation by Improved MPS Method Wang, Chao Zhou, Pengrui Zhuang, Xi-Ning Cui, Ziwei Dou, Menghan Chen, Zhao-Yun Guo, Guo-Ping Quantum Physics Efficient encoding of classical information plays a fundamental role in numerous practical quantum algorithms. However, the preparation of an arbitrary amplitude-encoded state has been proven to be time-consuming, and its deployment on current noisy devices can be challenging. In this work, we propose an improved Matrix Product State(MPS) method preparation protocol with an exponential reduction on the circuit depth, as well as topological adaptability. By refined utilization of the disentangling principle, we also reduce approximately 33% two-qubit gate count. To validate our method, we study various families of functions and distributions with provably bounded MPS rank. Numerical experiments show that our method significantly reduces circuit depth while achieving higher fidelity for states arising in financial and other applications. |
| title | Quantum State Preparation by Improved MPS Method |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2508.12821 |