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advanced_notions:quantum_field_theory:ghosts [2018/03/30 10:56] jakobadmin |
advanced_notions:quantum_field_theory:ghosts [2018/03/30 10:57] jakobadmin [Concrete] |
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<blockquote>The physical reason why ghosts may show up, is the non-local nature of the gauge- | <blockquote>The physical reason why ghosts may show up, is the non-local nature of the gauge- | ||
fixing procedure. If we demand, for instance, | fixing procedure. If we demand, for instance, | ||
- | $$∂µAµ = 0 , \tag{(3.1)}$$ | + | $$∂_µA^µ = 0 , \tag{(3.1)}$$ |
then the transition from some other gauge choice to this one requires knowledge of the | then the transition from some other gauge choice to this one requires knowledge of the | ||
field values of a given configuration over all of space-time. Since gauge transformations | field values of a given configuration over all of space-time. Since gauge transformations | ||
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needed.<cite>[[https://arxiv.org/pdf/hep-th/9812204.pdf|TOPOLOGICAL ASPECTS OF QUANTUM CHROMODYNAMICS]] by Gerard ’t Hooft</cite></blockquote> | needed.<cite>[[https://arxiv.org/pdf/hep-th/9812204.pdf|TOPOLOGICAL ASPECTS OF QUANTUM CHROMODYNAMICS]] by Gerard ’t Hooft</cite></blockquote> | ||
- | "One of the most insightful treatment of ghosts in quantum field theory appears in lecture notes for the Basko Polje Summer School (1976) by [[http://www.nbi.dk/~lautrup/papers/ghoulies.pdf|Benny Lautrup entitled Of Ghoulies and Ghosties]]." http://scipp.ucsc.edu/~haber/ph218/ | + | ---- |
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+ | * "One of the most insightful treatment of ghosts in quantum field theory appears in lecture notes for the Basko Polje Summer School (1976) by [[http://www.nbi.dk/~lautrup/papers/ghoulies.pdf|Benny Lautrup entitled Of Ghoulies and Ghosties]]." http://scipp.ucsc.edu/~haber/ph218/ | ||