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Harvard University Department of Physics in 2024-2026 reads as a 38-PI network with 24 internal PI collaborations. The dominant subject mix is Physics and Astronomy as the leading field (41% of slots across 28 PIs; 28 labels), Atomic and Molecular Physics, and Optics as the leading subfield (18% of slots across 15 PIs; 15 labels), and Quantum many-body systems as the leading topic (6% of slots across 7 PIs; 7 labels). Overall the pattern is balanced: there is enough structure to identify active groups, while the field mix still leaves room for multiple research identities. The leading PI names are David A. Weitz (18.1 weighted works; Innovative Microfluidic and Catalytic Techniques Innovation, Advanced biosensing and bioanalysis techniques). The most visible ties are Johannes Borregaard and Mikhail D. Lukin (4 shared works, weight 2.2). The leading breakdown groups are group 1 with 9 PIs, 11 internal connections, weight 11.6, around Atomic and Molecular Physics, and Optics, Artificial Intelligence, Condensed Matter Physics, led by Mikhail D. Lukin, Subir Sachdev, Ashvin Vishwanath.