Long-coherence pairing of low-mass conduction electrons in copper-substituted lead apatite
Abstract
Two entangled qubits emerge as an essential resource for quantum control, which are normally quantum confined with atomic precision. It seems inhibitive that in the macroscopic scope collective qubit pairs manifest long coherence and quantum entanglement, especially at high temperature. Here, we report this exotic ensemble effect in solid-state sintering lead apatite samples with copper substitution, which have been repeatedly duplicated with superior stability and low cost. An extraordinarily low-field absorption signal of cw electron paramagnetic resonance (EPR) spectroscopy stems from low-mass conduction electrons implying the coherence of cuprate radicals can be long-termly protected. The pulsed EPR experiments exhibit triplet Rabi oscillation from paired cuprate diradicals with the coherence time exceeding 1 microsecond at 85K. We believe these appealing effects are sufficiently promising to be applied for scalable quantum control and computation.
Keywords
Cite
@article{arxiv.2310.17160,
title = {Long-coherence pairing of low-mass conduction electrons in copper-substituted lead apatite},
author = {Jicheng Liu and Chenao He and Yin-Hui Peng and Zhihao Zhen and Guanhua Chen and Jia Wang and Xiao-Bao Yang and Xianfeng Qiao and Yao Yao and Dongge Ma},
journal= {arXiv preprint arXiv:2310.17160},
year = {2023}
}
Comments
16 pages, 4 figures