VCA.py 文件源码

def mgf_kmesh(self,omega,kmesh):
        '''
        Returns the mesh of the Green's functions in the mixed representation with respect to momentums.

        Parameters
        ----------
        omega : np.complex128/np.complex64
            The frequency of the mixed Green's functions.
        kmesh : (n+1)d ndarray like
            The kmesh of the mixed Green's functions.
            And n is the spatial dimension of the system.

        Returns
        -------
        3d ndarray
            The mesh of the mixed Green's functions.
        '''
        cgf=self.cgf(omega)
        return np.tensordot(cgf,inv(np.identity(cgf.shape[0],dtype=cgf.dtype)-self.pt_kmesh(kmesh).dot(cgf)),axes=([1],[1])).transpose((1,0,2))