Rajkumar (Raj) Kettimuthu is a Senior Scientist and Group Leader at Argonne National Laboratory, a Senior Scientist at The University of Chicago, and a Senior Fellow at Northwestern University. His research spans quantum networking, AI for science, and large-scale data and workflow systems. He leads InterQnet, a multi-institution effort to demonstrate a heterogeneous quantum network and to develop methods to scale entanglement distribution across platforms and distances. Raj has co-authored nearly 200 peer-reviewed papers and received an R&D 100 Award; his recent work on modeling quantum transduction in SeQUeNCe received a Best Paper Award at IEEE QCE 2025. He has helped build Argonne’s campus and regional quantum networking testbeds and collaborates widely across national labs, universities, and industry.
Presentation Title:
InterQnet: Toward Heterogeneous, Scalable Quantum Networks
Presentation Abstract:
InterQnet is a DOE project advancing scalable quantum communications through a full-stack co-design approach spanning devices, error handling, and network architecture. The project has two complementary thrusts. InterQnet-Achieve focuses on realizing heterogeneous quantum networks by integrating distinct physical platforms through first-generation repeaters, error mitigation schemes, and automated control. This effort will enable entanglement distribution between two platforms via a third, operating as a repeater node. InterQnet-Scale studies scalability through forward-looking simulations of architectures, network devices, entanglement protocols, and advanced error correction. I will present recent results from both thrusts, including progress toward a three-node heterogeneous network demonstration and SeQUeNCe-based evaluations of architectural choices. The talk will highlight how a co-design strategy across hardware, protocols, and orchestration is essential for advancing quantum networks toward metropolitan and national scales.