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electron_correlation_function_green_n_for_local_current

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guanjihuan
2022-01-12 03:36:11 +08:00
parent b587e8ab12
commit a2c580e9ef
3 changed files with 10 additions and 2 deletions
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PyPI/src/guan/calculate_Green_functions.py
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@@ -3,6 +3,7 @@
# calculate Green functions
import numpy as np
import guan
def green_function(fermi_energy, hamiltonian, broadening, self_energy=0):
if np.array(hamiltonian).shape==():
@@ -100,4 +101,10 @@ def green_function_with_leads(fermi_energy, h00, h01, h_LC, h_CR, center_hamilto
dim = np.array(center_hamiltonian).shape[0]
right_self_energy, left_self_energy, gamma_right, gamma_left = self_energy_of_lead_with_h_LC_and_h_CR(fermi_energy, h00, h01, h_LC, h_CR)
green = np.linalg.inv(fermi_energy*np.identity(dim)-center_hamiltonian-left_self_energy-right_self_energy)
return green, gamma_right, gamma_left
return green, gamma_right, gamma_left
def electron_correlation_function_green_n_for_local_current(fermi_energy, h00, h01, h_LC, h_CR, center_hamiltonian):
right_self_energy, left_self_energy, gamma_right, gamma_left = guan.self_energy_of_lead_with_h_LC_and_h_CR(fermi_energy, h00, h01, h_LC, h_CR)
green = guan.green_function(fermi_energy, center_hamiltonian, broadening=0, self_energy=left_self_energy+right_self_energy)
G_n = np.imag(np.dot(np.dot(green, gamma_left), green.transpose().conj()))
return G_n