Green’s functions
نویسنده
چکیده
1 The Schwinger-Keldysh contour 2 1.1 States and observables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 The interaction picture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 The entropy principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.4 Path integral formulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
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