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Results tagged with trace
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user 130091
Use this tag when having questions concerning expressions with the trace of a matrix/operator.
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Diagrammatic expansion of an operator insertion in path integral for Trace Anomaly calculation
\begin{equation}
\Theta^\mu_{\ \mu }=0
\end{equation}
In the context of the trace anomaly it is usual to treat the insertion of the trace of the energy-momentum tensor perturbatively to find out it it … I'm reading chapter 19 of Peskin and this questions arose in section 19.5 and, specifically, on figure 19.10
On that chapter he's dealing with a trace of the form
\begin{equation}
\Theta^\mu_{\ \mu …
- 4,737
5
votes
2
answers
979
views
Relation between the trace anomaly and the energy-momentum tensor being off-shell
psi}\Big\{\gamma^\mu D^\nu+\gamma^\nu D^\mu\Big\}\psi-\eta^{\mu\nu}i\bar{\psi}\not{D}\psi-F^{\mu\lambda}F^\nu_{\ \lambda}+\frac{1}{4}\eta^{\mu \nu}F^{\sigma\lambda}F_{\sigma\lambda}
\end{equation}
The trace …
- 4,737