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https://github.com/triqs/dft_tools
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27 lines
706 B
Python
27 lines
706 B
Python
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from pytriqs.gf.local import *
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class IPTSolver:
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def __init__(self, **params):
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self.U = params['U']
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self.beta = params['beta']
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# Matsubara frequency
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self.g = GfImFreq(indices=[0], beta=self.beta)
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self.g0 = self.g.copy()
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self.sigma = self.g.copy()
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# Imaginary time
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self.g0t = GfImTime(indices=[0], beta = self.beta)
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self.sigmat = self.g0t.copy()
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def solve(self):
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self.g0t <<= InverseFourier(self.g0)
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self.sigmat <<= (self.U**2) * self.g0t * self.g0t * self.g0t
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self.sigma <<= Fourier(self.sigmat)
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# Dyson equation to get G
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self.g <<= self.g0 * inverse(1.0 - self.sigma * self.g0)
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