On the uniqueness of Einstein-Cartan theory:Lagrangian,covariant derivative and equation of motion  

作　　者：Zi-Wei Chen Run Diao Xiang-Song Chen 

机构地区：[1]School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Communications in Theoretical Physics》2023年第4期63-69,共7页理论物理通讯（英文版）

基　　金：supported by the China NSF via Grants No.11535005 and No.11275077。

摘　　要：In the standard Einstein-Cartan theory,matter fields couple to gravity through the Minimal Coupling Procedure(MCP),and yet leave the theory an ambiguity.Applying MCP to the action or to the equation of motion would lead to different gravitational couplings.We propose a new covariant derivative to remove the ambiguity and discuss the relation between our proposal and previous treatments on this subject.

关 键 词：LAGRANGIAN covariant derivative equation of motion UNIQUENESS 

分 类 号：O412.1[理学—理论物理]