New post in Quantum-field-theory

Collapse in Quantum Field Theory?

August 9th, 2022

What are the main differences between these three quantum theories: QM, QFT & QG?

August 14th, 2020

Why not anything like spontaneous absorption?

June 23rd, 2020

How can a left-handed fermion field create a right-handed antifermion?

June 2nd, 2020

Quantum Field Theory cross sections integrals

August 1st, 2022

What's the relation or difference between Lippmann-Schwinger equation and Dyson equation?

March 28th, 2020

Why does a Lorentz scalar field transform as $U^{-1}(\Lambda)\phi(x)U(\Lambda) = \phi(\Lambda^{-1}x)$?

August 7th, 2022

Degree of divergence of a Feynman diagram

August 1st, 2022

Anomalies in QFT

April 26th, 2020

A certain gluon scattering amplitude

February 1st, 2020

Angular momentum operator in terms of ladder operators

January 1st, 2020

Very basic question about QFT at finite density

August 13th, 2022

How to determine correlation length when the correlation function decays as a power law?

May 24th, 2020

How do I derive the Feynman rules for graviton-photon coupling?

August 1st, 2022

What does stress-energy tensor supposed to mean in quantum field theories?

August 8th, 2022

Zero dimensional field theory

February 18th, 2021

Can virtual particles become real?

September 18th, 2021

About solitons, what is the difference between kinks and vortices?

August 25th, 2020

How is a blackbody spectrum formed in the Sun?

August 1st, 2022

S-matrix in Weinberg QFT

July 29th, 2020

Translational invariance implying diagonal representation in momentum space

September 27th, 2020

Why can't matter anihilate with itself?

August 1st, 2022

Why do negative norm states break unitarity?

May 16th, 2020

Intuition behind Linked Cluster Theorem: connected vs. non-connected diagrams

April 10th, 2020

C, T, P transformation mistakes in ``Peskin&Schroeder's QFT''?

August 1st, 2022

Peskin and Schroeder "Particle Creation by a Classical Source"

August 8th, 2022

Causality and Quantum Field Theory

March 4th, 2020

Frasca's mapping of classical Yang-Mills to $\phi^4$ theory

November 21st, 2020

Wilson loops and gauge invariant operators (Part 2)

June 13th, 2020

What does it mean that particles are the quanta of fields?

May 23rd, 2020