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Results tagged with quantum-field-theory
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user 106061
Quantum Field Theory (QFT) is the theoretical framework describing the quantisation of classical fields which allows a Lorentz-invariant formulation of quantum mechanics. QFT is used both in high energy physics as well as condensed matter physics and closely related to statistical field theory. Use this tag for many-body quantum-mechanical problems and the theory of particle physics. Don’t combine with the [quantum-mechanics] tag.
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Confusion taking functional derivatives of the generating functional (Coleman)
I'm reading Piers Coleman's Introduction to Many Body Physics and I've run into a strange issue.
In section 8.4, he considers a free theory in the presence of a source $[\bar\eta, \eta]$:
\begin{al …
- 784
7
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Accepted
What is the problem with quantizing GR in the Effective Field Theory approach?
There is nothing wrong with effective quantum general relativity as a QFT. It works fine and we can get effective answers for calculations. That said, most are not interested in calculating scattering …
- 784