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Ken.Wong
  • Member for 4 years, 2 months
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8 votes
1 answer
642 views

Haag's theorem and causal perturbation theory

6 votes
2 answers
638 views

Is the interaction picture in QFT properly used?

5 votes
2 answers
253 views

Confusion about quantum field in AQFT

4 votes
5 answers
138 views

How do Many-world interpretation explain we live in a "statistically right" universe?

4 votes
1 answer
190 views

The reasoning of the definition of $S$-matrix

3 votes
2 answers
206 views

Free expansion of interacting electron gas is an irreversible process

3 votes
1 answer
546 views

Why is renormalization (instead of regularization) is needed in QFT?

2 votes
0 answers
92 views

LSZ reduction for Bhabha scattering

2 votes
1 answer
478 views

Physical intuition for bare quantities to be infinite

1 vote
1 answer
82 views

Quantum measurement:can we recover evolution operator from measurement?

1 vote
1 answer
69 views

When you observed an quantum measurement, do you know the measurement result?

1 vote
0 answers
119 views

Confusion about tensor products of operators

0 votes
0 answers
124 views

Finite square well and continuity [duplicate]

0 votes
1 answer
214 views

Can the divergence of perturbation series hinting the solution is not an analytic function of the parameter?

0 votes
1 answer
123 views

Should the $S$-matrix always analytic in coupling constant?

0 votes
0 answers
63 views

Evolution operator as a Laurent series of coupling constant

0 votes
0 answers
70 views

Do we care about the distance between quantum observables?

0 votes
0 answers
69 views

Can we do regularization by just discarding the divergent part?