# Is there a way I can reduce the code for generating simple circuits with the same structure?

here's the code I'm using to generate 3 quantum circuits with the same structure (They're only differed by the first U3 gate on the qubit):

quancs = QuantumCircuit(1)  # Circ 1
quancs.u3(gamma,beta,delta,0)

quancs1 = QuantumCircuit(1) # Circ 2
quancs1.u3(2,3,2,0)
quancs1.u3(gamma,beta,delta,0)

quancs2 = QuantumCircuit(1) # Circuit 3.
quancs2.u3(-2.5,2,-2,0)
quancs2.u3(gamma,beta,delta,0)

results = execute(quancs, simulator).result()
results1 = execute(quancs1, simulator).result()
results2 = execute(quancs2, simulator).result()


I treated the circuits separately to obtain the results. I'm wondering is there a way I can simplify/shorten this code? Thanks for the help!

from qiskit.circuit import QuantumCircuit
def my_circuit(initial_gate_params, params):
circuit = QuantumCircuit(1)
circuit.u3(initial_gate_params[0],initial_gate_params[1],initial_gate_params[2],0)
circuit.u3(params[0], params[1], params[2], 0)
return circuit

initial_gate_params = [ [0,0,0], [2,3,2], [-2.5,2,-2] ] #the params for your initial u3 gate
params = [gamma, beta, zeta] #your defined gamma, beta, zeta

circuits = [my_circuit(i, params) for i in initial_gate_params ]

from qiskit import Aer, execute
backend = Aer.get_backend('qasm_simulator')
results = execute(circuits, backend)

• That looks great, thank you!
– ZR-
May 11 at 4:53