Advanced/retarded Feynman propagator?

Click For Summary
SUMMARY

The discussion centers on the concept of advanced and retarded Feynman propagators, specifically focusing on the Feynman propagator itself when modified by a theta step function. The inquiry seeks to explore how this modification can yield advanced or retarded propagators, diverging from the traditional juxtaposition of these concepts. The lack of responses indicates a need for further clarification or rephrasing of the original question to stimulate engagement.

PREREQUISITES
  • Understanding of quantum field theory principles
  • Familiarity with Feynman propagators and their mathematical representation
  • Knowledge of the theta step function and its applications in physics
  • Basic grasp of advanced mathematical concepts used in theoretical physics
NEXT STEPS
  • Research the mathematical formulation of Feynman propagators in quantum field theory
  • Study the properties and implications of the theta step function in physics
  • Explore the differences between advanced and retarded propagators in quantum mechanics
  • Investigate how modifications to propagators affect physical interpretations in quantum field theory
USEFUL FOR

The discussion is beneficial for theoretical physicists, graduate students in quantum mechanics, and researchers interested in advanced topics in quantum field theory.

thoughtgaze
Messages
74
Reaction score
0
is there a discussion somewhere on the notion of an advanced or retarded feynman propagator.

i don't mean the advanced or retarded propagator juxtaposed against the feynman propagator. I mean the feynman propagator itself with a theta step function multiplied by it to effectively give an advanced/retarded feynman propagator.
 
Physics news on Phys.org
Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 

Similar threads

Graduate What is the "real" Feynman propagator?
  • · Replies 7 ·
Replies
7
Views
4K
Graduate Propagator from a space-time point to itself
  • · Replies 6 ·
Replies
6
Views
2K
Graduate Cross section from subgraph in electron-proton DIS
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Developing the Feynman diagram expansion
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Why are 'virtual particles' allowed to be 'off-shell'?
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Majorana Propagator: Dirac vs. Majorana Equations
  • · Replies 4 ·
Replies
4
Views
6K
Graduate What is the Role and Significance of Feynman Diagrams in Quantum Physics?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Retarded time and advanced time (and binning)
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Operator Product Expansion as shown in Schwartz
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Vertex, Propagator and Loop counting
  • · Replies 5 ·
Replies
5
Views
3K