A Quantum field theory, spacetime, and coordinates

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The discussion centers on the complexities of integrating quantum field theory (QFT) with general relativity (GR), particularly regarding the treatment of Dirac fields and transformations. Participants express skepticism about the conventional pedagogy that separates field transformations from matrix transformations, suggesting a need for a unified approach that aligns with GR principles. The conversation highlights the importance of tetrads in understanding spinors within GR and questions the validity of treating Dirac fields as scalars. There is a consensus that energy, rather than rest mass, should be emphasized as the source of gravity in GR, with references to various texts supporting this view. The dialogue ultimately underscores the challenges of maintaining covariance in both GR and QFT while addressing the implications of using non-covariant quantities.
  • #61
rubi said:
I don't think there are any relativists who use a different definition.

Just to note, this thread is in the quantum forum, not the relativity forum, so the question is really what definition quantum field theorists use.
 

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