The Heterogeneous Architectures for Quantum (HARQ) program is now underway, working to address a fundamental challenge in quantum computing: how to scale beyond single-technology systems. Most current approaches rely on a single type of qubit, which forces system designs to inherit the limitations of that technology. HARQ is exploring a different model: integrating multiple qubit types within a single architecture, each selected for its strengths. Over the next 24 months, 19 teams across 15 organizations will develop the software and hardware needed to enable these systems, including cross-platform compilation tools and high-fidelity interconnects.
To learn more, see the DARPA news story: https://www.darpa.mil/news/2026/quantum-computing-different-qubits-better-together