# Faculty ## expand\_more [### Jordan Cotler ](/people/jordan-cotler) Assistant Professor of Physics ![Cotler](/sites/g/files/omnuum11241/files/styles/hwp_4_5__690x865/public/hetg/files/jordanpic1.jpg?itok=3-r-UdL2) [### Howard Georgi ](/people/howard-georgi) Mallinckrodt Professor of Physics; Harvard College Professor Master of Leverett House Director of Undergraduate Studies Howard Georgi has ongoing research programs in several areas of theoretical particle physics. The common elements in these areas are symmetries and quantum field theory. Georgi pioneered the subject of Grand Unified Theories, both without (with Sheldon... ![howard-1.jpg](/sites/g/files/omnuum11241/files/styles/hwp_4_5__690x865/public/hetg/files/howard-1.jpg?itok=g6HFyEXG) [### Daniel Jafferis ](/people/daniel-jafferis) Professor of Physics The research of Daniel Jafferis involves string theory, supersymmetric quantum field theory, and quantum gravity. String theory unifies many fundamental questions in theoretical physics, including the search for a complete description of quantum gravity... ![Jafferis](/sites/g/files/omnuum11241/files/styles/hwp_4_5__690x865/public/hetg/files/jafferisnew.jpg?itok=rxA9TIGP) [### Sonia Paban ](/people/sonia-paban) Senior Lecturer on Physics Senior Research Scientist in Physics Sonia Paban is a high-energy theorist currently working on early universe physics. She is interested in understanding the effects of many active fields during inflation. Most recently, she has studied the robustness of inflation to inhomogeneous initial... ![Sonia Paban](/sites/g/files/omnuum11241/files/styles/hwp_4_5__690x865/public/hetg/files/sonia_paban.jpg?itok=ztqUBRYg) [### Lisa Randall ](/people/lisa-randall) Frank B. Baird, Jr., Professor of Science Professor Lisa Randall studies theoretical particle physics and cosmology at Harvard University. Her research connects theoretical insights to puzzles in our current understanding of the properties and interactions of matter. She has developed and studied... ![lisa2.jpg.png](/sites/g/files/omnuum11241/files/styles/hwp_4_5__690x865/public/hetg/files/lisa2.jpg.png?itok=ejdHNWdL) [### Matthew Reece ](/people/matthew-reece) Professor of Physics Matthew Reece's research centers around connecting theoretical particle physics with new experimental results. This work proceeds mostly on two fronts. One is building models that attempt to extend the Standard Model of particle physics in ways that... ![reece.jpg](/sites/g/files/omnuum11241/files/styles/hwp_4_5__690x865/public/hetg/files/reece.jpg?itok=ceZY7i1H) [### Matthew Schwartz ](/people/matthew-schwhartz) Professor of Physics Matthew Schwartz's research is focused on expanding the boundaries of our current understanding of particle physics. This includes both developing new theoretical techniques for precision calculations and exploring the phenomenological consequences of new... ![cgl2opbu4aaf-p2.png](/sites/g/files/omnuum11241/files/styles/hwp_4_5__690x865/public/hetg/files/cgl2opbu4aaf-p2.png?itok=GC3nHVev) [### Andy Strominger ](/people/andy-strominger) [andrew\_strominger@harvard.edu](mailto:andrew_strominger@harvard.edu)Gwill E. York Professor of Physics Director, Center for the Fundamental Laws of Nature Using a variety of approaches, Professor Strominger’s research has endeavored to shed light on unsolved problems including the unification of forces and particles, the origin of the universe and the quantum structure of black holes and event horizons. His... ![Andrew Strominger 2023](/sites/g/files/omnuum11241/files/styles/hwp_4_5__690x865/public/hetg/files/andy_3_cropped_2_1.png?itok=OEcNVQQy) [### Cumrun Vafa ](/people/cumrun-vafa) Professor of Physics at Harvard University Faculty of Arts and Sciences Hollis Professor of Mathematicks and Natural Philosophy Cumrun Vafa is the Hollis Professor of Mathematicks and Natural Philosophy in the Physics Department at Harvard University, where he has done research and taught theoretical physics since 1985. Born in Iran in 1960, he moved to the US for higher education... ![Cumrun Vafa](/sites/g/files/omnuum11241/files/styles/hwp_4_5__690x865/public/hetg/files/screen_shot_2018-02-16_at_9.51.50_am.png?itok=KyKto27R) [### Xi Yin ](/people/xi-yin) Professor of Physics Xi Yin's research interest lies in the fundamental aspects of string theory, and what string theory can teach us about other fields in physics and mathematics. Xi Yin's research interest lies in the fundamental aspects of string theory, and what string... ![screen_shot_2015-09-04_at_4.24.55_pm.png](/sites/g/files/omnuum11241/files/styles/hwp_4_5__690x865/public/hetg/files/screen_shot_2015-09-04_at_4.24.55_pm.png?itok=6QfFZsfD)