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Oct
17
awarded  Nice Question
Sep
18
awarded  Yearling
Jan
4
awarded  Popular Question
May
5
accepted Lorentz transformations in Dirac equation
May
4
comment Lorentz transformations in Dirac equation
my question isn't fuzzy i think. I just wanted to get the equation$\xi ~\rightarrow~ \exp\left(\ i \frac{\bf{\sigma}}{2}\cdot \theta +\frac{\bf{\sigma}}{2} \cdot \phi\right) \xi~?$. any help would be approciated. Thanx.
May
2
comment Derrick’s theorem(2)
Actually I'm confused that how order of dimension is incorporated with $I_K$ and $I_V$. Change of variable didn't show this dimension analysis.
May
2
revised Derrick’s theorem(2)
added 3 characters in body
May
2
comment Derrick’s theorem(2)
$\begin{align} E_\lambda &= I_K(f_\lambda) + I_V(f_\lambda)\\ &=\lambda^{2-D} I_K[\bar\phi]+\lambda^{-D} I_V[\bar\phi]\tag{1} \end{align}$ How they considered this dimension? I mean how 2nd line came from the first line?
May
1
comment Derrick’s theorem(2)
I mean why It arises in the equation?> I mean the significance?
May
1
asked Derrick’s theorem(2)
May
1
comment Derrick’s theorem
Can you look at the equation (1) that how it came from the previous line?
May
1
asked Suggestions contents for soliton theory
May
1
accepted Vortex in D dimensions soliton
May
1
comment Vortex in D dimensions soliton
This is about global vortices in two dimensions. Fields cannot be continuously deformed to a vacuum solution can you focus on this please?
May
1
accepted Derrick’s theorem
May
1
asked Derrick’s theorem
Apr
30
comment Vortex in D dimensions soliton
Classical Solutions in Quantum Field Theory Solitons and Instantons in High Energy Physics ERICK J. WEINBERG Columbia University page no : 39
Apr
30
asked Vortex in D dimensions soliton
Apr
30
comment sine-Gordon equation
Can you please write some details the difference between,scalar field theory and $\phi^4$ theory?
Apr
30
comment sine-Gordon equation
Can you please look the book byLewis H.Rider page no (403). He discussed sine-Gordon equation with explaing the $\phi^4$ terms including which confirms us a relation between $\phi^4$ theory and sine-Gordon equation.