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Tagged with mean-field-theoryfield-theory
4 questions
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Correlation function calculation
From Mehran Kardar's Statistical Physics of Fields page 38 section 3.2 [...] $I_d(x,\xi)$ is the solution to the following differential equation $ \nabla^2 I_d(x) = \delta^d(x)+ I_d(x)/\xi^2$ ...
- 483
4votes
1answer
321views
Higgs Mechanism in Landau-Ginzburg approach
I'm experiencing some troubles with one of the exercises in Kardars book on Statical physics of fields (problem 5 Ch3) or see https://ocw.mit.edu/courses/physics/8-334-statistical-mechanics-ii-...
- 781
2votes
1answer
1kviews
Mean field theory formulation of Ising model
I am having a bit of trouble with basic combinatorics pertaining to the Ising model and mean field theory. Specifically, I get that the Hamiltonian can be written $H=-\frac{J}{2}\Sigma_{i,j} s_is_{i+...
- 4,127
0votes
0answers
213views
Mean-field approximation Graphene
I'm learning about the mean-field approximation and I want to rewrite the following Hamiltonian, which is the simplified part of the interaction term for Graphene: $$\hat{H}^1_I = g_1 c_2 \sum_{\...
