Year: 2025
Type: article
Abstract: Absorption and emission, fundamental interactions between light and matter, enable the regeneration of a quantum state of light via matter through concatenated quantum state transfer based on the principle of quantum teleportation. This transfer is enabled by electron spin-orbit entanglement and electron-nuclear spin entanglement inherent within the material. Here, we demonstrate that a photon quantum state imprinted in polarization is transferred to another photon emitted from a nitrogen vacancy (NV) center. This transfer is heralded by the result of the Bell state measurement between the electron and nitrogen nuclear spins. We show that the minimum number of incident photons needed to achieve transfer is, on average, only 0.1 photons, enabling quantum teleportation over 10 km. This demonstration paves the way for a quantum repeater that is robust against phase and intensity errors, unlike the conventional photon interference scheme, thereby facilitating practical quantum networks.
Source: npj Quantum Information
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $4,290
Awards: G1658339471, Universal holonomic quantum gate with optical shift control for diamond quantum computers, G2521286739, 量子計算網構築のための量子インターフェース開発, ダイヤモンドNV中心における長距離量子通信に向けた単一光子干渉によるもつれ生成, G3534460509, G3703913356, ダイヤモンド量子セキュリティ, Universal quantum media conversion in diamond quantum storage, G6150807914, G6718509927, G7222400979
OpenAlex ID: W7117407373