mit-physics
(3)
John Serri
John A. Serri is a physicist-turned-entrepreneur and the co-founder, Chairman and CEO of EyeQue Corporation, a Newark, California company that turns an ordinary smartphone into a clinically registered eye-refraction device. With a PhD in Physics from MIT and 35 years spent building secure government networks and one of the world's largest satellite phone systems (Globalstar), Serri launched EyeQue in his 60s to make affordable vision testing available to anyone with a phone. Under his leadership EyeQue built its at-home Personal Vision Tracker on technology licensed from MIT, won CES 2017 Best of Innovation, amassed roughly 25 patents, and reached users in more than 150 countries.
Yichen Shen
Yichen Shen is the founder and CEO of Lightelligence, an MIT spinout building computers that run on light instead of electricity. A physicist who earned his PhD at MIT in 2016, Shen co-authored a landmark 2017 Nature Photonics paper showing that deep-learning math could be done with interfering photons, then turned the idea into chips. His company has shipped photonic processors (PACE), the first optical network-on-chip (Hummingbird), and optical interconnects (Photowave), and in 2026 became the first AI photonic-computing company to go public.
William Greenberg
William 'Bill' Greenberg is a theoretical-physicist-turned-financier who runs Two Harbors Investment Corp (rebranded 'Two'), the mortgage REIT whose in-house servicing engine is RoundPoint Mortgage Servicing LLC. He holds a PhD in theoretical nuclear physics and has spent 25+ years managing structured-finance portfolios at Natixis, UBS and the Swiss National Bank's StabFund before joining Two Harbors in 2012 and becoming CEO in 2020. He pushed the company to bring mortgage servicing in-house by acquiring RoundPoint in 2023, then steered the firm through a high-profile 2025-2026 takeover battle that ended with UWM Holdings agreeing to buy the company.