Gediminas Juzeliūnas (born 14 July 1958) is a professor of theoretical physics and heads the Quantum optics group at Vilnius University in Lithuania. He has authored and co-authored more than 50 articles on quantum and nonlinear optics, as well as on theoretical condensed matter physics. Asteroid 289021 Juzeliunas, discovered by astronomers Kazimieras Černis and Justas Zdanavičius in 2004, was named in his and his father's honor. The official naming citation was published by the Minor Planet Center on 5 January 2015 (M.P.C. 91793).