Efficient tomography of microwave photonic cluster states
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866910032103211008 |
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| author | Sunada, Yoshiki Kono, Shingo Ilves, Jesper Sugiyama, Takanori Suzuki, Yasunari Okubo, Tsuyoshi Tamate, Shuhei Tabuchi, Yutaka Nakamura, Yasunobu |
| author_facet | Sunada, Yoshiki Kono, Shingo Ilves, Jesper Sugiyama, Takanori Suzuki, Yasunari Okubo, Tsuyoshi Tamate, Shuhei Tabuchi, Yutaka Nakamura, Yasunobu |
| contents | Entanglement among a large number of qubits is a crucial resource for many quantum algorithms. Such many-body states have been efficiently generated by entangling a chain of itinerant photonic qubits in the optical or microwave domain. However, it has remained challenging to fully characterize the generated many-body states by experimentally reconstructing their exponentially large density matrices. Here, we develop an efficient tomography method based on the matrix-product-operator formalism and demonstrate it on a cluster state of up to 35 microwave photonic qubits by reconstructing its $2^{35} \times 2^{35}$ density matrix. The full characterization enables us to detect the performance degradation of our photon source which occurs only when generating a large cluster state. This tomography method is generally applicable to various physical realizations of entangled qubits and provides an efficient benchmarking method for guiding the development of high-fidelity sources of entangled photons. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_03345 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Efficient tomography of microwave photonic cluster states Sunada, Yoshiki Kono, Shingo Ilves, Jesper Sugiyama, Takanori Suzuki, Yasunari Okubo, Tsuyoshi Tamate, Shuhei Tabuchi, Yutaka Nakamura, Yasunobu Quantum Physics Entanglement among a large number of qubits is a crucial resource for many quantum algorithms. Such many-body states have been efficiently generated by entangling a chain of itinerant photonic qubits in the optical or microwave domain. However, it has remained challenging to fully characterize the generated many-body states by experimentally reconstructing their exponentially large density matrices. Here, we develop an efficient tomography method based on the matrix-product-operator formalism and demonstrate it on a cluster state of up to 35 microwave photonic qubits by reconstructing its $2^{35} \times 2^{35}$ density matrix. The full characterization enables us to detect the performance degradation of our photon source which occurs only when generating a large cluster state. This tomography method is generally applicable to various physical realizations of entangled qubits and provides an efficient benchmarking method for guiding the development of high-fidelity sources of entangled photons. |
| title | Efficient tomography of microwave photonic cluster states |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2410.03345 |