High-fidelity realisation of CNOT gate in Majorana-based optical platform
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866918260031619072 |
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| author | Li, Jia-Kun Sun, Kai Hao, Ze-Yan Liang, Jia-He Pachos, Jiannis K. Byles, Lucy Xu, Jin-Shi Han, Yong-Jian Li, Chuan-Feng Guo, Guang-Can |
| author_facet | Li, Jia-Kun Sun, Kai Hao, Ze-Yan Liang, Jia-He Pachos, Jiannis K. Byles, Lucy Xu, Jin-Shi Han, Yong-Jian Li, Chuan-Feng Guo, Guang-Can |
| contents | We present the experimental realisation of a robust CNOT quantum gate using Majorana zero modes simulated on a photonic platform. Three Kitaev chains supporting Majorana zero modes at their endpoints are used to encode two logical qubits, and both intra-chain and inter-chain braiding operations are performed to implement the CNOT gate. While the topological encoding of quantum information in Majorana fermions does not offer full topological protection in our non-interacting photonic setting, it nevertheless exhibits a natural resilience to the dominant noise and decoherence effects present in the experiment. Consequently, the fidelity of the CNOT gate is significantly enhanced, surpassing 0.992 and addressing a key limitation in the path toward scalable quantum computation. These results represent a major advancement in topological quantum computing with Majorana fermions and underscore the potential of photonic platforms for realising high-fidelity quantum gates. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2508_14641 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | High-fidelity realisation of CNOT gate in Majorana-based optical platform Li, Jia-Kun Sun, Kai Hao, Ze-Yan Liang, Jia-He Pachos, Jiannis K. Byles, Lucy Xu, Jin-Shi Han, Yong-Jian Li, Chuan-Feng Guo, Guang-Can Quantum Physics Strongly Correlated Electrons We present the experimental realisation of a robust CNOT quantum gate using Majorana zero modes simulated on a photonic platform. Three Kitaev chains supporting Majorana zero modes at their endpoints are used to encode two logical qubits, and both intra-chain and inter-chain braiding operations are performed to implement the CNOT gate. While the topological encoding of quantum information in Majorana fermions does not offer full topological protection in our non-interacting photonic setting, it nevertheless exhibits a natural resilience to the dominant noise and decoherence effects present in the experiment. Consequently, the fidelity of the CNOT gate is significantly enhanced, surpassing 0.992 and addressing a key limitation in the path toward scalable quantum computation. These results represent a major advancement in topological quantum computing with Majorana fermions and underscore the potential of photonic platforms for realising high-fidelity quantum gates. |
| title | High-fidelity realisation of CNOT gate in Majorana-based optical platform |
| topic | Quantum Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2508.14641 |