Robust transfer of a quantum state from an absorbed photon into a diamond spin

• URL: http://arxiv.org/abs/2505.09292v1
• Date: Wed, 14 May 2025 11:18:23 GMT
• Title: Robust transfer of a quantum state from an absorbed photon into a diamond spin
• Authors: Daisuke Ito, Yuhei Sekiguchi, Raustin Reyes, Taichi Fujiwara, Toshiharu Makino, Hiromitsu Kato, Hideo Kosaka,
• Abstract summary: Conversion of a quantum state from a flying qubit to a qubit is crucial for distributed quantum computing.<n>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.<n>This achievement enables extraordinarily robust entanglement generation between remote quantum memories compared with the conventional photon-interference-based approaches.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: 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.

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