2020/12/12 by Jia-Wei Ji, Yufeng Wu, Ji, Jia-Wei +10
Computer Science · Physics and Astronomy · #FOS: Physical sciences #Mechanical and Optical Resonators #Quantum Information and Cryptography #Quantum Physics (quant-ph) #Quantum and electron transport phenomena #quant-ph
paper · pdf · doi:10.48550/arxiv.2012.06687
This paper has been updated with the identifier: arXiv:2203.06611 which has been published in Quantum as Quantum 6, 669 (2022) with the related DOI: https://doi.org/10.22331/q-2022-03-17-669
openalex publication_date 2020/12/12 · arxiv created 2022/03/29 · arxiv updated 2022/03/30 · openalex created_date 2022/04/03 · openalex updated_date 2026/07/28
We propose a quantum repeater architecture that can operate under ambient conditions. Our proposal builds on recent progress towards non-cryogenic spin-photon interfaces based on nitrogen-vacancy centers, which have excellent spin coherence times even at room temperature, and optomechanics, which allows to avoid phonon-related decoherence and also allows the emitted photons to be in the telecom band. We apply the photon number decomposition method to quantify the fidelity and the efficiency of entanglement established between two remote electron spins. We describe how the entanglement can be stored in nuclear spins and extended to long distances via quasi-deterministic entanglement swapping operations involving the electron and nuclear spins. We furthermore propose schemes to achieve high-fidelity readout of the spin states at room temperature using the spin-optomechanics interface. Our work shows that long-distance quantum networks made of solid-state components that operate at room temperature are within reach of current technological capabilities.