Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. It only takes a minute to sign up.

Sign up to join this community
Anybody can ask a question
Anybody can answer
The best answers are voted up and rise to the top

Explore our questions

0 votes
0 answers
14 views

Non-perturbative approach to high-energy physics

1 vote
0 answers
16 views

Expectation value of stress-energy tensor

4 votes
1 answer
81 views

Nonlinear symmetry realization: what is it for and caveats?

3 votes
0 answers
61 views

Why are non-perturbative solutions important and how to take them into account?

10 votes
2 answers
244 views

How to properly make sense of the $\mathcal{S}$-matrix as a correlator on a sphere?

3 votes
1 answer
99 views
+50

What does it mean to add the wave function of axion particles together?

0 votes
1 answer
210 views

Field operators for states with spin

1 vote
0 answers
36 views

What is the fermion mass matrix for a Yukawa Lagrangian?

0 votes
1 answer
51 views

How to solve this type of series?

1 vote
1 answer
52 views

The abstract state of a particle

2 votes
0 answers
54 views

Most general 4-fermion EFT

6 votes
2 answers
114 views

Are Grassmann numbers always "under the hood" if we deal with fermionic ladder / field operators?

4 votes
1 answer
96 views

Dyson equation from the equation of motion of the one-body Green's function

1 vote
1 answer
48 views

One-loop triangle integral with equal masses

Browse more Questions