哈根·克莱纳特（Hagen Kleinert），德国柏林自由大学理论物理学教授（自1968年），俄罗斯科学院荣誉院士。克莱纳特教授因其在粒子物理和固体物理方面的贡献被授予2008年马克思-波恩奖奖章。他对于列夫·朗道百年诞辰纪念文集的贡献为他赢得了2008年Majorana 奖奖章。

克莱纳特教授着有超过370篇学术论文，涉及数学物理，基本粒子物理，原子核物理，固体物理，液晶，生物膜，微乳胶，聚合物和市场经济理论。 他着有多部理论物理学专着。自1990年以来，其著作“路径积分在量子力学，统计物理，聚合物，金融物理中的应用”已被再版四次，最新的两版包括了有关市场经济的章节。 该书受到广泛好评。

Hagen Kleinert (born 15 June 1941) is Professor of Theoretical Physics at the Free University of Berlin, Germany (since 1968), Honorary Doctor at the West University of Timişoara, and at the Kyrgyz-Russian Slavic University in Bishkek. He is also Honorary Member of the Russian Academy of Creative Endeavors. For his contributions to particle and solid state physics he was awarded the Max Born Prize 2008 with Medal. His contribution to the memorial volume celebrating the 100th birthday of Lev Davidovich Landau earned him the Majorana Prize 2008 with Medal.