Complete Self-Testing of a System of Remote Superconducting Qubits
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arXiv
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| Auteurs principaux: | , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866918095309766656 |
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| author | Storz, Simon Kulikov, Anatoly Schär, Josua D. Barizien, Victor Valcarce, Xavier Berterottière, Florence Sangouard, Nicolas Bancal, Jean-Daniel Wallraff, Andreas |
| author_facet | Storz, Simon Kulikov, Anatoly Schär, Josua D. Barizien, Victor Valcarce, Xavier Berterottière, Florence Sangouard, Nicolas Bancal, Jean-Daniel Wallraff, Andreas |
| contents | Self-testing protocols enable the certification of quantum systems in a device-independent manner, i.e. without knowledge of the inner workings of the quantum devices under test. Here, we demonstrate this high standard for characterization routines with superconducting circuits, a prime platform for building large-scale quantum computing systems. We first develop the missing theory allowing for the self-testing of Pauli measurements. We then self-test Bell pair generation and measurements at the same time, performing a complete self-test in a system composed of two entangled superconducting circuits operated at a separation of 30 meters. In an experiment based on 17 million trials, we measure an average CHSH (Clauser-Horne-Shimony-Holt) S-value of 2.236. Without relying on additional assumptions on the experimental setup, we certify an average Bell state fidelity of at least 58.9% and an average measurement fidelity of at least 89.5% in a device-independent manner, both with 99% confidence. This enables applications in the field of distributed quantum computing and communication with superconducting circuits, such as delegated quantum computing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_01299 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Complete Self-Testing of a System of Remote Superconducting Qubits Storz, Simon Kulikov, Anatoly Schär, Josua D. Barizien, Victor Valcarce, Xavier Berterottière, Florence Sangouard, Nicolas Bancal, Jean-Daniel Wallraff, Andreas Quantum Physics Self-testing protocols enable the certification of quantum systems in a device-independent manner, i.e. without knowledge of the inner workings of the quantum devices under test. Here, we demonstrate this high standard for characterization routines with superconducting circuits, a prime platform for building large-scale quantum computing systems. We first develop the missing theory allowing for the self-testing of Pauli measurements. We then self-test Bell pair generation and measurements at the same time, performing a complete self-test in a system composed of two entangled superconducting circuits operated at a separation of 30 meters. In an experiment based on 17 million trials, we measure an average CHSH (Clauser-Horne-Shimony-Holt) S-value of 2.236. Without relying on additional assumptions on the experimental setup, we certify an average Bell state fidelity of at least 58.9% and an average measurement fidelity of at least 89.5% in a device-independent manner, both with 99% confidence. This enables applications in the field of distributed quantum computing and communication with superconducting circuits, such as delegated quantum computing. |
| title | Complete Self-Testing of a System of Remote Superconducting Qubits |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2408.01299 |