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arXiv 1107.2262gr-qchep-phhep-th
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曲空间中的有效势与截断正则化

Effective Potential in Curved Space and Cut-Off Regularizations

Flavia Sobreira, Baltazar J. Ribeiro, Ilya L. Shapiro

摘要:

我们考虑了弯曲时空中标量场的有效势的物理正则化方法的推导,使用了两种协变截断正则化。第一种是基于局部动量表象和Riemann正规坐标,第二种是基于Fock-Schwinger-DeWitt真时表象的算子正则化。我们表明,自相互作用的标量场的例子,这两种方法产生相同的结果的分歧,但第一个给出了更详细的信息的有限部分。此外,我们还计算了大质量费米子圈的贡献,讨论了重整化群方程及其在多质量理论中的解释。

英文摘要:

We consider derivation of the effective potential for a scalar field in curved space-time within the physical regularization scheme, using two sorts of covariant cut-off regularizations. The first one is based on the local momentum representation and Riemann normal coordinates and the second is operatorial regularization, based on the Fock-Schwinger-DeWitt proper-time representation. We show, on the example of a self-interacting scalar field, that these two methods produce equal results for divergences, but the first one gives more detailed information about the finite part. Furthermore, we calculate the contribution from a massive fermion loop and discuss renormalization group equations and their interpretation for the multi-mass theories.

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