Robust transfer of a quantum state from an absorbed photon into a diamond spin
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 could enable extraordinarily robust entanglement generation between remote quantum memories compared with the conventional photon-interference-based approaches and paves the way for stable quantum networks.
Authors
- Raustin Reyes (ORCID: https://orcid.org/0000-0002-4880-1654)
- Toshiharu Makino (ORCID: https://orcid.org/0000-0003-1298-103X)
- Hiromitsu Kato (ORCID: https://orcid.org/0000-0002-3550-0350)
- Hideo Kosaka (ORCID: https://orcid.org/0000-0002-3778-7236)
- Daisuke Itô (ORCID: https://orcid.org/0000-0002-3597-2745)
- Yuhei Sekiguchi (ORCID: https://orcid.org/0000-0002-8850-4646)
- Toshimichi Fujiwara (ORCID: https://orcid.org/0000-0001-7739-3525)
Institutions
- Yokohama National University (JP)
- National Institute of Advanced Industrial Science and Technology (JP)
Publication Details
- Journal
- Optics Letters
- Published
- 2025-07-16
- DOI
- https://doi.org/10.1364/ol.567933
- Citations
- 1
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 2.48
Funders
- Ministry of Internal Affairs and Communications
- Japan Society for the Promotion of Science
- Japan Science and Technology Agency