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 le...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.展开更多
基金supported by the China NSF via Grants No.11535005 and No.11275077。
文摘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.
