Physics
Jia Yiyang's user avatar
Jia Yiyang's user avatar
Jia Yiyang's user avatar
Jia Yiyang
  • Member for 11 years, 9 months
  • Last seen more than a month ago
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About

I'm no longer active on physics stackexchange, partly due to the decline of the quality of the site and partly due to the abuse of moderation power. See this meta post.

If you need contact me, please send me an email or find me at www.physicsoverflow.org

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All Questions Answers
Score Newest
question
36
Is it really proper to say Ward identity is a consequence of gauge invariance?
Jul 12, 2013
question
23
EM wave function & photon wavefunction
May 19, 2012
question
22
Time ordering and time derivative in path integral formalism and operator formalism
Jul 23, 2013
question
22
Can we "trivialize" the equivalence between canonical quantization of fields and second quantization of particles?
Nov 18, 2013
question
21
Topological insulators: why K-theory classification rather than homotopy classification?
Mar 19, 2014
question
19
What's the relation between perturbative and nonperturbative QFT?
Jul 31, 2012
question
17
A curious issue about Dyson-Schwinger equation (DSE): why does it work so well?
Aug 21, 2013
question
17
When can we take the Brillouin zone to be a sphere?
May 6, 2014
question
16
Why do many people say vector fields describe spin-1 particle but omit the spin-0 part?
Dec 25, 2012
answer
14
single-particle wavepackets in QFT and position measurement
Nov 4, 2013
Top Meta posts
2
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14
Why did my comments under the community ad for physicsoverflow get deleted thrice?
12
Community Promotion Ads - 2015
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61
Why do differential forms have a much richer structure than vector fields?
10
If $e^A$ and $e^B$ commute, do $A$ and $B$ commute for finite dimensional matrices?
10
Is every complex Lie algebra a complexification?
8
How does a geometry-oriented mind learn analysis?
5
What are the orthogonal polynomials with respect to the weight $2\cosh(\beta x)e^{-x^2}$?

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