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Tag Archive for: S-matrix

What are virtual particles

Virtual Particles Explained: On-Shell vs Off-Shell in QFT

February 18, 2019
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1 Comment
What Is a Virtual Particle? A virtual particle is a mathematical device, not a physical entity, that appears in perturbation expansions of the S-operator…
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Learn Interacting Quantum Fields in Mathematical Quantum Field Theory

January 29, 2018
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9 Comments
This is one chapter in a series on Mathematical Quantum Field Theory.The previous chapter is 14. Free quantum fields.The next chapter is 16. Renormalization. 15.…
https://www.physicsforums.com/insights/wp-content/uploads/2017/10/qft_quantumfields.png 135 240 Urs Schreiber https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png Urs Schreiber2018-01-29 01:34:392026-06-07 06:47:45Learn Interacting Quantum Fields in Mathematical Quantum Field Theory

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