On the loop expansion of the effective action

Tran Huu Phat, Nguyen Van Long


Based on the DeWitt formula the loop expansion of the effective action is easily established. Extending to the system with finite density we develop the in-medium DeWitt formula, which is the starting point for setting up loop expansion of the in-medium effective action.

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DOI: https://doi.org/10.15625/0868-3166/14/2/10696 Display counter: Abstract : 98 views. PDF : 121 views.


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