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18 lines
622 B
Python
18 lines
622 B
Python
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from pytriqs.gf.local import GfReFreq, Omega, Wilson, inverse
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import numpy
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eps_d,V = 0.3, 0.2
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# Create the real-frequency Green's function and initialize it
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g = GfReFreq(indices = ['s','d'], window = (-2, 2), n_points = 1000, name = "s+d")
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g['d','d'] = Omega - eps_d
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g['d','s'] = V
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g['s','d'] = V
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g['s','s'] = inverse( Wilson(1.0) )
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g.invert()
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# Plot it with matplotlib. 'S' means: spectral function ( -1/pi Imag (g) )
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from pytriqs.plot.mpl_interface import oplot
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oplot( g['d','d'], '-o', RI = 'S', x_window = (-1.8,1.8), name = "Impurity" )
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oplot( g['s','s'], '-x', RI = 'S', x_window = (-1.8,1.8), name = "Bath" )
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