← Search

Xinchi Qiu

10 accepted papers

2026

DES-LOC: Desynced Low Communication Adaptive Optimizers for Foundation Models

ICLR 2026poster

Scaling foundation model training with Distributed Data Parallel~(DDP) methods is bandwidth-limited. Existing infrequent communication methods like Local SGD were designed to synchronize model parameters only and cannot be trivially applied to adaptive optimizers due to additional optimizer states.…

Cited by 0SourceScholar
2026

Editing as Unlearning: Are Knowledge Editing Methods Strong Baselines for Large Language Model Unlearning?

AAAI 2026technical

Large language Model (LLM) unlearning, i.e., selectively removing information from LLMs, is vital for responsible model deployment. Differently, LLM knowledge editing aims to modify LLM knowledge instead of removing it. Though editing and unlearning seem to be two distinct tasks, we find there is a

Cited by 0SourcePDFScholar
2026

Hallucination Reduction with CASAL: Contrastive Activation Steering for Amortized Learning

ICLR 2026poster

Large Language Models (LLMs) exhibit impressive capabilities but often hallucinate, confidently providing incorrect answers instead of admitting ignorance. Prior work has shown that models encode linear representations of their own knowledge and that activation steering can reduce hallucinations. Th…

Cited by 0SourceScholar
2026

LoRDO: Distributed Low-Rank Optimization with Infrequent Communication

ICML 2026poster

Distributed training of foundation models via $\texttt{DDP}$ is limited by interconnect bandwidth. While infrequent communication strategies reduce synchronization frequency, they remain bottlenecked by the memory and communication requirements of optimizer states. Low-rank optimizers can alleviate …

Cited by 0SourceScholar
2026

MT-DAO: Multi-Timescale Distributed Adaptive Optimizers with Local Updates

ICLR 2026poster

Training large models with distributed data parallelism (DDP) requires frequent communication of gradients across workers, which can saturate bandwidth. Infrequent communication strategies (e.g., Local SGD) reduce this overhead but, when applied to adaptive optimizers, often suffer a performance gap…

Cited by 0SourceScholar
2025

DEPT: Decoupled Embeddings for Pre-training Language Models

ICLR 2025oral

Language Model pre-training uses broad data mixtures to enhance performance across domains and languages. However, training on such heterogeneous text corpora requires extensive and expensive efforts. Since these data sources vary significantly in lexical, syntactic, and semantic aspects, they cause…

Cited by 1SourcePDFScholar
2025

LLM Unlearning via Neural Activation Redirection

NeurIPS 2025poster

The ability to selectively remove knowledge from LLMs is highly desirable. However, existing methods often struggle with balancing unlearning efficacy and retain model utility, and lack controllability at inference time to emulate base model behavior as if it had never seen the unlearned data. In th…

Cited by 0SourceScholar
2024

Breaking Physical and Linguistic Borders: Multilingual Federated Prompt Tuning for Low-Resource Languages

ICLR 2024poster

Pretrained large language models (LLMs) have emerged as a cornerstone in modern natural language processing, with their utility expanding to various applications and languages. However, the fine-tuning of multilingual LLMs, particularly for low-resource languages, is fraught with challenges steming…

Cited by 17SourcePDFScholar
2023

FedL2P: Federated Learning to Personalize

NeurIPS 2023poster

Federated learning (FL) research has made progress in developing algorithms for distributed learning of global models, as well as algorithms for local personalization of those common models to the specifics of each client’s local data distribution. However, different FL problems may require differen…

2022

ZeroFL: Efficient On-Device Training for Federated Learning with Local Sparsity

ICLR 2022poster

When the available hardware cannot meet the memory and compute requirements to efficiently train high performing machine learning models, a compromise in either the training quality or the model complexity is needed. In Federated Learning (FL), nodes are orders of magnitude more constrained than tra…

Cited by 77SourcePDFScholar