← Search

Iftekhar Naim

4 accepted papers

2026

On the Theoretical Limitations of Embedding-Based Retrieval

ICLR 2026poster

Vector embeddings have been tasked with an ever-increasing set of retrieval tasks over the years, with a nascent rise in using them for reasoning, instruction-following, coding, and more. These new benchmarks push embeddings to work for any query and any notion of relevance that could be given. Whil…

Cited by 0SourcecodeScholar
2025

LOFT: Scalable and More Realistic Long-Context Evaluation

NAACL 2025findings

Long-context language models (LCLMs) have the potential to revolutionize our approach to tasks traditionally reliant on external tools like retrieval systems or databases. Leveraging LCLMs’ ability to natively ingest and process entire corpora of information offers numerous advantages. It enhances u…

2023

Rethinking the Role of Token Retrieval in Multi-Vector Retrieval

NeurIPS 2023poster

Multi-vector retrieval models such as ColBERT [Khattab et al., 2020] allow token-level interactions between queries and documents, and hence achieve state of the art on many information retrieval benchmarks. However, their non-linear scoring function cannot be scaled to millions of documents, necess…

2022

Transforming Sequence Tagging Into A Seq2Seq Task

EMNLP 2022main

Pretrained, large, generative language models (LMs) have had great success in a wide range of sequence tagging and structured prediction tasks. Casting a sequence tagging task as a Seq2Seq one requires deciding the formats of the input and output sequences. However, we lack a principled understandin…