- #1
spaghetti3451
- 1,344
- 34
Gauge symmetry is not a symmetry. It is a fake, a redundancy introduced by hand to help us keep track of massless particles in quantum field theory. All physical predictions must be gauge-independent.
--------------------------------------------------------------------------------------------------------------------------------------------------------
How can you prove that correlators in quantum field theory are gauge-independent?
Must correlators necessarily have gauge-invariant operators?
What are some examples of correlation functions with gauge-invariant operators?
--------------------------------------------------------------------------------------------------------------------------------------------------------
How can you prove that correlators in quantum field theory are gauge-independent?
Must correlators necessarily have gauge-invariant operators?
What are some examples of correlation functions with gauge-invariant operators?