High-fidelity realisation of CNOT gate in Majorana-based optical platform

• URL: http://arxiv.org/abs/2508.14641v1
• Date: Wed, 20 Aug 2025 11:48:15 GMT
• Title: High-fidelity realisation of CNOT gate in Majorana-based optical platform
• Abstract summary: We present the experimental realisation of a robust CNOT quantum gate using Majorana zero modes simulated on a photonic platform.<n>Three Kitaev chains supporting Majorana zero modes at their endpoints are used to encode two logical qubits.<n>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.
• Score: 2.0129789297520104
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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.

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