Robust transfer of a quantum state from an absorbed photon into a diamond spin
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2025-07-16 |
| Journal | Optics Letters |
| Authors | Daisuke ItĂŽ, Yuhei Sekiguchi, Raustin Reyes, Toshimichi Fujiwara, Toshiharu Makino |
| Institutions | National Institute of Advanced Industrial Science and Technology, Yokohama National University |
Abstract
Section titled âAbstractâConversion 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.