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Jia Yiyang
  • Member for 10 years, 7 months
  • Last seen more than 1 year ago
14 votes

single-particle wavepackets in QFT and position measurement

11 votes

Can the photoelectric effect be explained without photons?

10 votes

Is it really proper to say Ward identity is a consequence of gauge invariance?

10 votes

Scattering amplitude and LSZ formula

8 votes

Why can I replace a gauge field $A^{\mu}$ by the current $j^{\mu}$ it couples to in the calculation of a Greens function?

7 votes
Accepted

Why do disconnected diagrams not contribute to the S matrix?

6 votes

Noether charge of local symmetries

5 votes
Accepted

Trying to rhyme Peskin and Schroeder with Weinberg

5 votes
Accepted

About Boltzmann H-theorem

3 votes

Off-shell external line

2 votes
Accepted

Question on derivation of Ward identity

2 votes

Examples of "pseudo quantum effects" in history of physics

1 vote
Accepted

Primary constraints for constrained Hamiltonian systems

0 votes

Why isn't the wave equation $\nabla^2 \psi - 1/c^2 \partial_{tt} \psi = (\frac{mc}{\hbar})^2\psi$