Karen Avetovich Ter-Martirosyan (28 September 1922 - 19 November 2005) was a Soviet and Russian theoretical physicist of Armenian descent. He is known for his contributions to quantum mechanics and quantum field theory and the author of several hundred articles in his area.
He was born in Tbilisi (Georgian SSR) and graduated from Tbilisi State University in 1943. After two years of teaching physics at the Tbilisi Railroad Institute, he obtained a Candidate of Sciences degree (Ph.D. equivalent) at the Leningrad Physico-Technical Institute in St. Petersburg, advised by Yakov Frenkel. After working at the theory division the same place (1949-55) he moved to Institute for Theoretical and Experimental Physics in Moscow, where he founded the Elementary Particle Physics chair of the Moscow Institute of Physics and Technology and the Laboratory of Hadron Physics.
He was a student of Lev Landau and his research colleague Isaak Pomeranchuk. Among his students were Vladimir Gribov, Alexey Andreevich Anselm, Alexander Polyakov, Arkady Migdal, Alexander Zamolodchikov, Alexey Kaidalov. Also, he organized schools and conferences in Nor-Hamberd of Yerevan in Armenia.