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visits member for 1 year, 9 months
seen Jun 28 at 15:24

Jul
2
awarded  Curious
May
21
awarded  Benefactor
May
21
accepted Domain walls intersection
May
20
comment Domain walls intersection
You said "however there is still a theorem that the ground state is non-degenerate and has no zeroes"-can you provide a reference?
May
17
revised Domain walls intersection
deleted 2 characters in body
May
14
comment Why is $ \vec{S}^{(A)} \otimes \vec{S}^{(B)} = \frac{\hbar^2}{4}(\sigma_x \otimes \sigma_x + \sigma_y \otimes\sigma_y + \sigma_z \otimes \sigma_z)$?
I mean, is it just a notation?
May
14
comment Why is $ \vec{S}^{(A)} \otimes \vec{S}^{(B)} = \frac{\hbar^2}{4}(\sigma_x \otimes \sigma_x + \sigma_y \otimes\sigma_y + \sigma_z \otimes \sigma_z)$?
Can you explain in what sense you write spin $S$ as vector? Because Pauli matrices are basis in su(2) algebra, they can't be coordinates of the vector, do they?
May
14
comment Why is $ \vec{S}^{(A)} \otimes \vec{S}^{(B)} = \frac{\hbar^2}{4}(\sigma_x \otimes \sigma_x + \sigma_y \otimes\sigma_y + \sigma_z \otimes \sigma_z)$?
Can you explain in what sense you write the first equality? It's just a notation? Because Pauli matrices is the basis of su(2) algebra, they can't be coordinates of the vector, do they?
May
14
revised Domain walls intersection
added 6 characters in body
May
14
revised Domain walls intersection
added 202 characters in body
May
14
revised Domain walls intersection
added 202 characters in body
May
12
asked Domain walls intersection
May
8
accepted Derivation of matrix element
May
8
comment Derivation of matrix element
Thank you for the hint with creation operator <3
May
5
revised Derivation of matrix element
added 1 character in body
May
5
revised Derivation of matrix element
added 11 characters in body
May
4
reviewed Reject suggested edit on Derivation of matrix element
May
4
asked Derivation of matrix element
Apr
24
comment What is the connection between Conformal Field Theory and Renormalization group in QFT?
@Learningisamess Thanks for explanation. Correct me please if I've misunderstood something: when we analyze QFT renormalization using RG approach, we obtain important notion as critical points. Then we introduce stress-energy tensor and obtain that it's trace equals to zero at them. But this condition allows us to introduce conformal symmetry preserving the vanishing trace and therefore Conformal Field Theory at critical points. Am I right? If so, why it wasn't introduced some analog of RG analysis based on conformal symmetry(not only in critical points)? This is due to technical difficulties?
Apr
21
asked What is the connection between Conformal Field Theory and Renormalization group in QFT?