Condensed Matter

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43. Schwinger-Keldysh: Martin-Siggia-Rose diagrammatics (non-equilibrium diagrammatic methods 2)

Posted by Dmitry
May 14, 2008

I start to discuss Martin-Siggia-Rose diagrammatic methods and transition from Fokker-Planck equation back to quasiclassical Schwinger-Keldysh action.

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42. Recalling a couple of facts about 2D and 3D Ising models

Posted by Dmitry
May 12, 2008

I discuss free fermion representation for the 2D Ising model and mention how string theory can be related to the critica behavior of the 3D Ising model.

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