version 0.0.49

PyPI/src/guan/Fourier_transform.py

@@ -5,6 +5,8 @@
 import numpy as np
 import cmath
 
+# Fourier_transform for discrete lattices
+
 def one_dimensional_fourier_transform(k, unit_cell, hopping):
     unit_cell = np.array(unit_cell)
     hopping = np.array(hopping)
@@ -24,4 +26,60 @@ def three_dimensional_fourier_transform_for_cubic_lattice(k1, k2, k3, unit_cell,
     hopping_2 = np.array(hopping_2)
     hopping_3 = np.array(hopping_3)
     hamiltonian = unit_cell+hopping_1*cmath.exp(1j*k1)+hopping_1.transpose().conj()*cmath.exp(-1j*k1)+hopping_2*cmath.exp(1j*k2)+hopping_2.transpose().conj()*cmath.exp(-1j*k2)+hopping_3*cmath.exp(1j*k3)+hopping_3.transpose().conj()*cmath.exp(-1j*k3)
-    return hamiltonian
+    return hamiltonian
+
+
+## calculate reciprocal lattice vectors
+
+def calculate_one_dimensional_reciprocal_lattice_vector(a1):
+    b1 = 2*np.pi/a1
+    return b1
+
+def calculate_two_dimensional_reciprocal_lattice_vectors(a1, a2):
+    a1 = np.array(a1)
+    a2 = np.array(a2)
+    a1 = np.append(a1, 0)
+    a2 = np.append(a2, 0)
+    a3 = np.array([0, 0, 1])
+    b1 = 2*np.pi*np.cross(a2, a3)/np.dot(a1, np.cross(a2, a3))
+    b2 = 2*np.pi*np.cross(a3, a1)/np.dot(a1, np.cross(a2, a3))
+    b1 = np.delete(b1, 2)
+    b2 = np.delete(b2, 2)
+    return b1, b2
+
+def calculate_three_dimensional_reciprocal_lattice_vectors(a1, a2, a3):
+    a1 = np.array(a1)
+    a2 = np.array(a2)
+    a3 = np.array(a3)
+    b1 = 2*np.pi*np.cross(a2, a3)/np.dot(a1, np.cross(a2, a3))
+    b2 = 2*np.pi*np.cross(a3, a1)/np.dot(a1, np.cross(a2, a3))
+    b3 = 2*np.pi*np.cross(a1, a2)/np.dot(a1, np.cross(a2, a3))
+    return b1, b2, b3
+
+def calculate_one_dimensional_reciprocal_lattice_vector_with_sympy(a1):
+    import sympy
+    b1 = 2*sympy.pi/a1
+    return b1
+
+def calculate_two_dimensional_reciprocal_lattice_vectors_with_sympy(a1, a2):
+    import sympy
+    a1 = sympy.Matrix(1, 3, [a1[0], a1[1], 0])
+    a2 = sympy.Matrix(1, 3, [a2[0], a2[1], 0])
+    a3 = sympy.Matrix(1, 3, [0, 0, 1])
+    cross_a2_a3 = a2.cross(a3)
+    cross_a3_a1 = a3.cross(a1)
+    b1 = 2*sympy.pi*cross_a2_a3/a1.dot(cross_a2_a3)
+    b2 = 2*sympy.pi*cross_a3_a1/a1.dot(cross_a2_a3)
+    b1 = sympy.Matrix(1, 2, [b1[0], b1[1]])
+    b2 = sympy.Matrix(1, 2, [b2[0], b2[1]])
+    return b1, b2
+
+def calculate_three_dimensional_reciprocal_lattice_vectors_with_sympy(a1, a2, a3):
+    import sympy
+    cross_a2_a3 = a2.cross(a3)
+    cross_a3_a1 = a3.cross(a1)
+    cross_a1_a2 = a1.cross(a2)
+    b1 = 2*sympy.pi*cross_a2_a3/a1.dot(cross_a2_a3)
+    b2 = 2*sympy.pi*cross_a3_a1/a1.dot(cross_a2_a3)
+    b3 = 2*sympy.pi*cross_a1_a2/a1.dot(cross_a2_a3)
+    return b1, b2, b3

PyPI/src/guan/Green_functions.py

@@ -1,6 +1,6 @@
 # Guan is an open-source python package developed and maintained by https://www.guanjihuan.com/about. The primary location of this package is on website https://py.guanjihuan.com.
 
-# calculate Green functions
+# Green functions
 
 import numpy as np
 import guan

PyPI/src/guan/__init__.py

@@ -6,12 +6,11 @@ from .basic_functions import *
 from .Fourier_transform import *
 from .Hamiltonian_of_finite_size_systems import *
 from .Hamiltonian_of_models_in_the_reciprocal_space import *
-from .calculate_band_structures_and_wave_functions import *
-from .calculate_Green_functions import *
-from .calculate_density_of_states import *
-from .calculate_conductance import *
-from .calculate_scattering_matrix import *
-from .calculate_topological_invariant import *
+from .band_structures_and_wave_functions import *
+from .Green_functions import *
+from .density_of_states import *
+from .quantum_transport import *
+from .topological_invariant import *
 from .read_and_write import *
 from .plot_figures import *
 from .others import *

PyPI/src/guan/band_structures_and_wave_functions.py

@@ -1,8 +1,8 @@
 # Guan is an open-source python package developed and maintained by https://www.guanjihuan.com/about. The primary location of this package is on website https://py.guanjihuan.com.
 
-# calculate_band_structures_and_wave_functions
+# band_structures_and_wave_functions
 
-## calculate band structures
+## band structures
 
 import numpy as np
 import cmath
@@ -66,7 +66,7 @@ def calculate_eigenvalue_with_two_parameters(x_array, y_array, hamiltonian_funct
             i0 += 1
     return eigenvalue_array
 
-## calculate wave functions
+## wave functions
 
 def calculate_eigenvector(hamiltonian):
     eigenvalue, eigenvector = np.linalg.eigh(hamiltonian) 

PyPI/src/guan/basic_functions.py

@@ -71,59 +71,4 @@ def sigma_zy():
     return np.kron(sigma_z(), sigma_y())
 
 def sigma_zz():
-    return np.kron(sigma_z(), sigma_z())
-
-## calculate reciprocal lattice vectors
-
-def calculate_one_dimensional_reciprocal_lattice_vector(a1):
-    b1 = 2*np.pi/a1
-    return b1
-
-def calculate_two_dimensional_reciprocal_lattice_vectors(a1, a2):
-    a1 = np.array(a1)
-    a2 = np.array(a2)
-    a1 = np.append(a1, 0)
-    a2 = np.append(a2, 0)
-    a3 = np.array([0, 0, 1])
-    b1 = 2*np.pi*np.cross(a2, a3)/np.dot(a1, np.cross(a2, a3))
-    b2 = 2*np.pi*np.cross(a3, a1)/np.dot(a1, np.cross(a2, a3))
-    b1 = np.delete(b1, 2)
-    b2 = np.delete(b2, 2)
-    return b1, b2
-
-def calculate_three_dimensional_reciprocal_lattice_vectors(a1, a2, a3):
-    a1 = np.array(a1)
-    a2 = np.array(a2)
-    a3 = np.array(a3)
-    b1 = 2*np.pi*np.cross(a2, a3)/np.dot(a1, np.cross(a2, a3))
-    b2 = 2*np.pi*np.cross(a3, a1)/np.dot(a1, np.cross(a2, a3))
-    b3 = 2*np.pi*np.cross(a1, a2)/np.dot(a1, np.cross(a2, a3))
-    return b1, b2, b3
-
-def calculate_one_dimensional_reciprocal_lattice_vector_with_sympy(a1):
-    import sympy
-    b1 = 2*sympy.pi/a1
-    return b1
-
-def calculate_two_dimensional_reciprocal_lattice_vectors_with_sympy(a1, a2):
-    import sympy
-    a1 = sympy.Matrix(1, 3, [a1[0], a1[1], 0])
-    a2 = sympy.Matrix(1, 3, [a2[0], a2[1], 0])
-    a3 = sympy.Matrix(1, 3, [0, 0, 1])
-    cross_a2_a3 = a2.cross(a3)
-    cross_a3_a1 = a3.cross(a1)
-    b1 = 2*sympy.pi*cross_a2_a3/a1.dot(cross_a2_a3)
-    b2 = 2*sympy.pi*cross_a3_a1/a1.dot(cross_a2_a3)
-    b1 = sympy.Matrix(1, 2, [b1[0], b1[1]])
-    b2 = sympy.Matrix(1, 2, [b2[0], b2[1]])
-    return b1, b2
-
-def calculate_three_dimensional_reciprocal_lattice_vectors_with_sympy(a1, a2, a3):
-    import sympy
-    cross_a2_a3 = a2.cross(a3)
-    cross_a3_a1 = a3.cross(a1)
-    cross_a1_a2 = a1.cross(a2)
-    b1 = 2*sympy.pi*cross_a2_a3/a1.dot(cross_a2_a3)
-    b2 = 2*sympy.pi*cross_a3_a1/a1.dot(cross_a2_a3)
-    b3 = 2*sympy.pi*cross_a1_a2/a1.dot(cross_a2_a3)
-    return b1, b2, b3
+    return np.kron(sigma_z(), sigma_z())

PyPI/src/guan/calculate_conductance.py

@@ -1,84 +0,0 @@
-# Guan is an open-source python package developed and maintained by https://www.guanjihuan.com/about. The primary location of this package is on website https://py.guanjihuan.com.
-
-# calculate conductance
-
-import numpy as np
-import copy
-import guan
-
-def calculate_conductance(fermi_energy, h00, h01, length=100):
-    right_self_energy, left_self_energy, gamma_right, gamma_left = guan.self_energy_of_lead(fermi_energy, h00, h01)
-    for ix in range(length):
-        if ix == 0:
-            green_nn_n = guan.green_function(fermi_energy, h00, broadening=0, self_energy=left_self_energy)
-            green_0n_n = copy.deepcopy(green_nn_n)
-        elif ix != length-1:
-            green_nn_n = guan.green_function_nn_n(fermi_energy, h00, h01, green_nn_n, broadening=0)
-            green_0n_n = guan.green_function_in_n(green_0n_n, h01, green_nn_n)
-        else:
-            green_nn_n = guan.green_function_nn_n(fermi_energy, h00, h01, green_nn_n, broadening=0, self_energy=right_self_energy)
-            green_0n_n = guan.green_function_in_n(green_0n_n, h01, green_nn_n)
-    conductance = np.trace(np.dot(np.dot(np.dot(gamma_left, green_0n_n), gamma_right), green_0n_n.transpose().conj()))
-    return conductance
-
-def calculate_conductance_with_fermi_energy_array(fermi_energy_array, h00, h01, length=100):
-    dim = np.array(fermi_energy_array).shape[0]
-    conductance_array = np.zeros(dim)
-    i0 = 0
-    for fermi_energy_0 in fermi_energy_array:
-        conductance_array[i0] = np.real(calculate_conductance(fermi_energy_0, h00, h01, length))
-        i0 += 1
-    return conductance_array
-
-def calculate_conductance_with_disorder(fermi_energy, h00, h01, disorder_intensity=2.0, disorder_concentration=1.0, length=100):
-    right_self_energy, left_self_energy, gamma_right, gamma_left = guan.self_energy_of_lead(fermi_energy, h00, h01)
-    dim = np.array(h00).shape[0]
-    for ix in range(length):
-        disorder = np.zeros((dim, dim))
-        for dim0 in range(dim):
-            if np.random.uniform(0, 1)<=disorder_concentration:
-                disorder[dim0, dim0] = np.random.uniform(-disorder_intensity, disorder_intensity)
-        if ix == 0:
-            green_nn_n = guan.green_function(fermi_energy, h00+disorder, broadening=0, self_energy=left_self_energy)
-            green_0n_n = copy.deepcopy(green_nn_n)
-        elif ix != length-1:
-            green_nn_n = guan.green_function_nn_n(fermi_energy, h00+disorder, h01, green_nn_n, broadening=0)
-            green_0n_n = guan.green_function_in_n(green_0n_n, h01, green_nn_n)
-        else:
-            green_nn_n = guan.green_function_nn_n(fermi_energy, h00+disorder, h01, green_nn_n, broadening=0, self_energy=right_self_energy)
-            green_0n_n = guan.green_function_in_n(green_0n_n, h01, green_nn_n)
-    conductance = np.trace(np.dot(np.dot(np.dot(gamma_left, green_0n_n), gamma_right), green_0n_n.transpose().conj()))
-    return conductance
-
-def calculate_conductance_with_disorder_intensity_array(fermi_energy, h00, h01, disorder_intensity_array, disorder_concentration=1.0, length=100, calculation_times=1):
-    dim = np.array(disorder_intensity_array).shape[0]
-    conductance_array = np.zeros(dim)
-    i0 = 0
-    for disorder_intensity_0 in disorder_intensity_array:
-        for times in range(calculation_times):
-            conductance_array[i0] = conductance_array[i0]+np.real(calculate_conductance_with_disorder(fermi_energy, h00, h01, disorder_intensity=disorder_intensity_0, disorder_concentration=disorder_concentration, length=length))
-        i0 += 1
-    conductance_array = conductance_array/calculation_times
-    return conductance_array
-
-def calculate_conductance_with_disorder_concentration_array(fermi_energy, h00, h01, disorder_concentration_array, disorder_intensity=2.0, length=100, calculation_times=1):
-    dim = np.array(disorder_concentration_array).shape[0]
-    conductance_array = np.zeros(dim)
-    i0 = 0
-    for disorder_concentration_0 in disorder_concentration_array:
-        for times in range(calculation_times):
-            conductance_array[i0] = conductance_array[i0]+np.real(calculate_conductance_with_disorder(fermi_energy, h00, h01, disorder_intensity=disorder_intensity, disorder_concentration=disorder_concentration_0, length=length))
-        i0 += 1
-    conductance_array = conductance_array/calculation_times
-    return conductance_array
-
-def calculate_conductance_with_scattering_length_array(fermi_energy, h00, h01, length_array, disorder_intensity=2.0, disorder_concentration=1.0, calculation_times=1):
-    dim = np.array(length_array).shape[0]
-    conductance_array = np.zeros(dim)
-    i0 = 0
-    for length_0 in length_array:
-        for times in range(calculation_times):
-            conductance_array[i0] = conductance_array[i0]+np.real(calculate_conductance_with_disorder(fermi_energy, h00, h01, disorder_intensity=disorder_intensity, disorder_concentration=disorder_concentration, length=length_0))
-        i0 += 1
-    conductance_array = conductance_array/calculation_times
-    return conductance_array

PyPI/src/guan/density_of_states.py

@@ -1,6 +1,6 @@
 # Guan is an open-source python package developed and maintained by https://www.guanjihuan.com/about. The primary location of this package is on website https://py.guanjihuan.com.
 
-# calculate density of states
+# density of states
 
 import numpy as np
 from math import *

PyPI/src/guan/quantum_transport.py

@@ -1,11 +1,93 @@
 # Guan is an open-source python package developed and maintained by https://www.guanjihuan.com/about. The primary location of this package is on website https://py.guanjihuan.com.
 
-# calculate scattering matrix
+# quantum transport
+
+## conductance
 
 import numpy as np
 import copy
 import guan
 
+def calculate_conductance(fermi_energy, h00, h01, length=100):
+    right_self_energy, left_self_energy, gamma_right, gamma_left = guan.self_energy_of_lead(fermi_energy, h00, h01)
+    for ix in range(length):
+        if ix == 0:
+            green_nn_n = guan.green_function(fermi_energy, h00, broadening=0, self_energy=left_self_energy)
+            green_0n_n = copy.deepcopy(green_nn_n)
+        elif ix != length-1:
+            green_nn_n = guan.green_function_nn_n(fermi_energy, h00, h01, green_nn_n, broadening=0)
+            green_0n_n = guan.green_function_in_n(green_0n_n, h01, green_nn_n)
+        else:
+            green_nn_n = guan.green_function_nn_n(fermi_energy, h00, h01, green_nn_n, broadening=0, self_energy=right_self_energy)
+            green_0n_n = guan.green_function_in_n(green_0n_n, h01, green_nn_n)
+    conductance = np.trace(np.dot(np.dot(np.dot(gamma_left, green_0n_n), gamma_right), green_0n_n.transpose().conj()))
+    return conductance
+
+def calculate_conductance_with_fermi_energy_array(fermi_energy_array, h00, h01, length=100):
+    dim = np.array(fermi_energy_array).shape[0]
+    conductance_array = np.zeros(dim)
+    i0 = 0
+    for fermi_energy_0 in fermi_energy_array:
+        conductance_array[i0] = np.real(calculate_conductance(fermi_energy_0, h00, h01, length))
+        i0 += 1
+    return conductance_array
+
+def calculate_conductance_with_disorder(fermi_energy, h00, h01, disorder_intensity=2.0, disorder_concentration=1.0, length=100):
+    right_self_energy, left_self_energy, gamma_right, gamma_left = guan.self_energy_of_lead(fermi_energy, h00, h01)
+    dim = np.array(h00).shape[0]
+    for ix in range(length):
+        disorder = np.zeros((dim, dim))
+        for dim0 in range(dim):
+            if np.random.uniform(0, 1)<=disorder_concentration:
+                disorder[dim0, dim0] = np.random.uniform(-disorder_intensity, disorder_intensity)
+        if ix == 0:
+            green_nn_n = guan.green_function(fermi_energy, h00+disorder, broadening=0, self_energy=left_self_energy)
+            green_0n_n = copy.deepcopy(green_nn_n)
+        elif ix != length-1:
+            green_nn_n = guan.green_function_nn_n(fermi_energy, h00+disorder, h01, green_nn_n, broadening=0)
+            green_0n_n = guan.green_function_in_n(green_0n_n, h01, green_nn_n)
+        else:
+            green_nn_n = guan.green_function_nn_n(fermi_energy, h00+disorder, h01, green_nn_n, broadening=0, self_energy=right_self_energy)
+            green_0n_n = guan.green_function_in_n(green_0n_n, h01, green_nn_n)
+    conductance = np.trace(np.dot(np.dot(np.dot(gamma_left, green_0n_n), gamma_right), green_0n_n.transpose().conj()))
+    return conductance
+
+def calculate_conductance_with_disorder_intensity_array(fermi_energy, h00, h01, disorder_intensity_array, disorder_concentration=1.0, length=100, calculation_times=1):
+    dim = np.array(disorder_intensity_array).shape[0]
+    conductance_array = np.zeros(dim)
+    i0 = 0
+    for disorder_intensity_0 in disorder_intensity_array:
+        for times in range(calculation_times):
+            conductance_array[i0] = conductance_array[i0]+np.real(calculate_conductance_with_disorder(fermi_energy, h00, h01, disorder_intensity=disorder_intensity_0, disorder_concentration=disorder_concentration, length=length))
+        i0 += 1
+    conductance_array = conductance_array/calculation_times
+    return conductance_array
+
+def calculate_conductance_with_disorder_concentration_array(fermi_energy, h00, h01, disorder_concentration_array, disorder_intensity=2.0, length=100, calculation_times=1):
+    dim = np.array(disorder_concentration_array).shape[0]
+    conductance_array = np.zeros(dim)
+    i0 = 0
+    for disorder_concentration_0 in disorder_concentration_array:
+        for times in range(calculation_times):
+            conductance_array[i0] = conductance_array[i0]+np.real(calculate_conductance_with_disorder(fermi_energy, h00, h01, disorder_intensity=disorder_intensity, disorder_concentration=disorder_concentration_0, length=length))
+        i0 += 1
+    conductance_array = conductance_array/calculation_times
+    return conductance_array
+
+def calculate_conductance_with_scattering_length_array(fermi_energy, h00, h01, length_array, disorder_intensity=2.0, disorder_concentration=1.0, calculation_times=1):
+    dim = np.array(length_array).shape[0]
+    conductance_array = np.zeros(dim)
+    i0 = 0
+    for length_0 in length_array:
+        for times in range(calculation_times):
+            conductance_array[i0] = conductance_array[i0]+np.real(calculate_conductance_with_disorder(fermi_energy, h00, h01, disorder_intensity=disorder_intensity, disorder_concentration=disorder_concentration, length=length_0))
+        i0 += 1
+    conductance_array = conductance_array/calculation_times
+    return conductance_array
+
+
+## scattering matrix
+
 def if_active_channel(k_of_channel):
     if np.abs(np.imag(k_of_channel))<1e-6:
         if_active = 1

PyPI/src/guan/topological_invariant.py

@@ -1,6 +1,6 @@
 # Guan is an open-source python package developed and maintained by https://www.guanjihuan.com/about. The primary location of this package is on website https://py.guanjihuan.com.
 
-# calculate topological invariant
+# topological invariant
 
 import numpy as np
 import cmath