机译:通过广义Feynman-Hellmann定理针对混合态推导内部能量
Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, China;
Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China;
Special Class for Gifted Young, University of Science and Technology of China, Hefei 230026, China;
generalized Feynman-Hellmann theorem; internal energy; mixed state;