Report summary

The 2023-2026 picture for Harvard University Department of Physics is a 65-PI network with 62 internal PI collaborations. The research center of gravity is Physics and Astronomy as the leading field (42% of slots across 45 PIs; 45 labels), Atomic and Molecular Physics, and Optics as the leading subfield (18% of slots across 26 PIs; 26 labels), and Particle physics theoretical and experimental studies as the leading topic (4% of slots across 8 PIs; 8 labels). This is a solid, readable collaboration map: group-level fit matters more than a single department-wide label. The top weighted PIs are David A. Weitz (22.5 weighted works; Innovative Microfluidic and Catalytic Techniques Innovation, 3D Printing in Biomedical Research); L. Mahadevan (18.1 weighted works; Advanced Materials and Mechanics, Micro and Nano Robotics). The strongest pairings are Mikhail D. Lukin and Hongkun Park (17 shared works, weight 8.4). The standout breakdown groups are group 1 with 10 PIs, 10 internal connections, weight 22.9, around Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Artificial Intelligence, led by Mikhail D. Lukin, Subir Sachdev, Philip Kim.