38.5 For further reading
Concept links · terms present in this machine draft; source roles are unverified: group action
The material of this chapter is often developed in conventional quantum field theory texts in the context of relativistic rather than non-relativistic quantum field theory. Symmetry generators are also more often derived via Lagrangian methods (Noether’s theorem) rather than the Hamiltonian methods used here. For an example of a detailed physics textbook discussion relatively close to this one, getting quadratic operators based on group actions on the space of solutions to field equations, see [35].
来源与版本
正文：英文 · OCR 机器稿 · 待校对
核对状态：OCR 机器稿 · 待校对
原书 PDF · 印刷页 404、405、406、407、408、409、410、411、412、413、414、415、416
来源版本：2025-10-20
来源 PDF SHA-256：5a1941b2443b54d5db3d055f1e5ba390429b7a728475258017aaac87ee85a837
OCR 来源 SHA-256：944936b50f1debc035a04675c184a65cd33cba3ab5d01ffb5e963bdd51051a07
OCR 产物 SHA-256：944936b50f1debc035a04675c184a65cd33cba3ab5d01ffb5e963bdd51051a07