传家宝
发表于 2025-3-21 16:52:56
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MELON
发表于 2025-3-21 21:22:48
Irene Jung Fiala Ph.D. SociologyDeWitt’s background field approach to gauge theories is reviewed. This approach guarantees that the effective action is gauge invariant. This point is discussed in some detail.
ineffectual
发表于 2025-3-22 00:59:36
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A精确的
发表于 2025-3-22 04:52:04
Helena Carreiras Ph.D.,Gerhard KümmelA detailed account is presented of DeWitt’s computation of the small proper time expansion of the heat kernel corresponding to the covariant laplacian (a.k.a. d’Alembertian). Some useful recursion relations discovered by Gilkey are also reviewed.
机密
发表于 2025-3-22 10:29:21
Introduction and Generalities,After some introduction on the difficulties of constructing a Quantum Field Theory of General Relativity (or a General Relativistic Quantum Field Theory) we briefly mention Schwinger’s action principle and Peierls’ brackets as the starting principle of any covariant approach to a QFT.
言外之意
发表于 2025-3-22 16:15:39
The Background Field Approach in Quantum Field Theory,DeWitt’s background field approach to gauge theories is reviewed. This approach guarantees that the effective action is gauge invariant. This point is discussed in some detail.
言外之意
发表于 2025-3-22 21:05:13
The One Loop Effective Action,In this section some useful techniques are presented that help in the computation of the one loop effective action. The zeta function approach as well as heat kernel techniques are reviewed. Some examples of physical applications are included: the conformal anomaly and the vacuum energy.
Radiation
发表于 2025-3-23 00:47:12
Divergences Out of Schwinger-DeWitt Coefficients,A detailed account is presented of DeWitt’s computation of the small proper time expansion of the heat kernel corresponding to the covariant laplacian (a.k.a. d’Alembertian). Some useful recursion relations discovered by Gilkey are also reviewed.
宫殿般
发表于 2025-3-23 02:53:26
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虚情假意
发表于 2025-3-23 09:37:06
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