Create quantum circuit file for a single trotterization step of the maxcut QAOA algorithm.

rand_reg_graph_maxcut_step_qasm_create.py

import networkx as nx

reg = 3
n = 100
seed = 0

gamma0 = -0.743043
beta0 = 0.754082

# create the random graph
G = nx.random_regular_graph(reg, n)

# add all the gates
circ = "{}\n".format(n)
for i in range(n):
    circ += "H {}\n".format(i)
for i, j in G.edges:
    circ += "CNOT {} {}\n".format(i, j)
    circ += "Rz {} {}\n".format(gamma0, j)
    circ += "CNOT {} {}\n".format(i, j)
for i in range(n):
    circ += "Rx {} {}\n".format(beta0, i)

# write the string to file
fname = "{}regRand{}Node{}.qasm".format(reg, n, seed)
with open(fname, mode='w') as file:
    file.write(circ)