@article{concordasynchronoussparseaggregationford,
  title = {CONCORD: Asynchronous Sparse Aggregation for Device-Cloud RAG under Document Isolation},
  author = {Xuedong Hu and Zhiqing Tang and Zhi Yao and Tian Wang and Weijia Jia},
  year = {2026},
  eprint = {2606.15179},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.15179},
}