Quantum-network nodes with real-time noise mitigation using spectator qubits
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866917418710859776 |
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| author | Loenen, S. J. H. Wang, Y. Demetriou, N. Bradley, C. E. Taminiau, T. H. |
| author_facet | Loenen, S. J. H. Wang, Y. Demetriou, N. Bradley, C. E. Taminiau, T. H. |
| contents | Quantum networks might enable quantum communication and distributed quantum computation. Solid-state defects are promising platforms for such networks, because they provide an optical interface for remote entanglement distribution and a nuclear-spin register to store and process quantum information. A key challenge towards larger networks is to improve the storage of previously generated entangled states during new entanglement generation. Here, we introduce a method that uses `spectator' qubits combined with real-time decision making and feedforward to mitigate dephasing of stored quantum states during remote entanglement sequences. We implement the protocol using a single NV center in diamond and demonstrate improved memory fidelity. Our results show that spectator qubits can improve quantum network memory using minimal overhead and naturally present resources, making them a promising addition for near-term testbeds for quantum networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_05582 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum-network nodes with real-time noise mitigation using spectator qubits Loenen, S. J. H. Wang, Y. Demetriou, N. Bradley, C. E. Taminiau, T. H. Quantum Physics Quantum networks might enable quantum communication and distributed quantum computation. Solid-state defects are promising platforms for such networks, because they provide an optical interface for remote entanglement distribution and a nuclear-spin register to store and process quantum information. A key challenge towards larger networks is to improve the storage of previously generated entangled states during new entanglement generation. Here, we introduce a method that uses `spectator' qubits combined with real-time decision making and feedforward to mitigate dephasing of stored quantum states during remote entanglement sequences. We implement the protocol using a single NV center in diamond and demonstrate improved memory fidelity. Our results show that spectator qubits can improve quantum network memory using minimal overhead and naturally present resources, making them a promising addition for near-term testbeds for quantum networks. |
| title | Quantum-network nodes with real-time noise mitigation using spectator qubits |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2505.05582 |