Omar Khattab

2026

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LIR: The First Workshop on Late Interaction and Multi Vector Retrieval @ ECIR 2026.
Benjamin Clavié|Xianming Li|Antoine Chaffin|Omar Khattab|Tom Aarsen|Manuel Faysse|Jing Li
Advances in Information Retrieval - 48th European Conference on Information Retrieval, ECIR 2026, Delft, The Netherlands, March 29 - April 2, 2026, Proceedings, Part III

2025

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ColBERT-Serve: Efficient Multi-stage Memory-Mapped Scoring.
Kaili Huang|Thejas Venkatesh|Uma Dingankar|Antonio Mallia|Daniel Campos|Jian Jiao|Christopher Potts|Matei Zaharia|Kwabena Boahen|Omar Khattab|Saarthak Sarup|Keshav Santhanam
Advances in Information Retrieval - 47th European Conference on Information Retrieval, ECIR 2025, Lucca, Italy, April 6-10, 2025, Proceedings, Part IV
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WARP: An Efficient Engine for Multi-Vector Retrieval.
Jan Luca Scheerer|Matei Zaharia|Christopher Potts|Gustavo Alonso|Omar Khattab
Proceedings of the 48th International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2025, Padua, Italy, July 13-18, 2025

2022

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Introducing Neural Bag of Whole-Words with ColBERTer: Contextualized Late Interactions using Enhanced Reduction.
Sebastian Hofstätter|Omar Khattab|Sophia Althammer|Mete Sertkan|Allan Hanbury
Proceedings of the 31st ACM International Conference on Information & Knowledge Management, Atlanta, GA, USA, October 17-21, 2022
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PLAID: An Efficient Engine for Late Interaction Retrieval.
Keshav Santhanam|Omar Khattab|Christopher Potts|Matei Zaharia
Proceedings of the 31st ACM International Conference on Information & Knowledge Management, Atlanta, GA, USA, October 17-21, 2022

2021

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Learning Passage Impacts for Inverted Indexes.
Antonio Mallia|Omar Khattab|Torsten Suel|Nicola Tonellotto
SIGIR '21: The 44th International ACM SIGIR Conference on Research and Development in Information Retrieval, Virtual Event, Canada, July 11-15, 2021

2020

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Finding the Best of Both Worlds: Faster and More Robust Top-k Document Retrieval.
Omar Khattab|Mohammad Hammoud|Tamer Elsayed
Proceedings of the 43rd International ACM SIGIR conference on research and development in Information Retrieval, SIGIR 2020, Virtual Event, China, July 25-30, 2020
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ColBERT: Efficient and Effective Passage Search via Contextualized Late Interaction over BERT.
Omar Khattab|Matei Zaharia
Proceedings of the 43rd International ACM SIGIR conference on research and development in Information Retrieval, SIGIR 2020, Virtual Event, China, July 25-30, 2020

2018

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PolyHJ: A Polymorphic Main-Memory Hash Join Paradigm for Multi-Core Machines.
Omar Khattab|Mohammad Hammoud|Omar Shekfeh
Proceedings of the 27th ACM International Conference on Information and Knowledge Management, CIKM 2018, Torino, Italy, October 22-26, 2018