Robust transfer of a quantum state from an absorbed photon into a diamond spin
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866916736990707712 |
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| author | Ito, Daisuke Sekiguchi, Yuhei Reyes, Raustin Fujiwara, Taichi Makino, Toshiharu Kato, Hiromitsu Kosaka, Hideo |
| author_facet | Ito, Daisuke Sekiguchi, Yuhei Reyes, Raustin Fujiwara, Taichi Makino, Toshiharu Kato, Hiromitsu Kosaka, Hideo |
| contents | Conversion of a quantum state from a flying qubit to a memory qubit is crucial for distributed quantum computing. However, this requires precise spatiotemporal or frequency/phase alignment. Here, we experimentally demonstrate quantum teleportation-based state transfer from a photon into a spin in a nitrogen-vacancy center in diamond robust against both spectral and temporal errors. The achieved fidelity exceeds 0.94 within a frequency error of 100 MHz and 0.93 within an arrival-time error of 100 ns. This achievement enables extraordinarily robust entanglement generation between remote quantum memories compared with the conventional photon-interference-based approaches and paves the way for stable quantum networks. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_09292 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Robust transfer of a quantum state from an absorbed photon into a diamond spin Ito, Daisuke Sekiguchi, Yuhei Reyes, Raustin Fujiwara, Taichi Makino, Toshiharu Kato, Hiromitsu Kosaka, Hideo Quantum Physics Conversion of a quantum state from a flying qubit to a memory qubit is crucial for distributed quantum computing. However, this requires precise spatiotemporal or frequency/phase alignment. Here, we experimentally demonstrate quantum teleportation-based state transfer from a photon into a spin in a nitrogen-vacancy center in diamond robust against both spectral and temporal errors. The achieved fidelity exceeds 0.94 within a frequency error of 100 MHz and 0.93 within an arrival-time error of 100 ns. This achievement enables extraordinarily robust entanglement generation between remote quantum memories compared with the conventional photon-interference-based approaches and paves the way for stable quantum networks. |
| title | Robust transfer of a quantum state from an absorbed photon into a diamond spin |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2505.09292 |