Quantum Code related stuff, mainly using Qiskit.
Simply graphs the counts of states that a quantum circuit produces as a single value (theta) is varied from 0 to 2*pi.
circuit = QuantumCircuit(2, 2)
circuit.ry(theta_val, 0)
circuit.cx(0, 1)
circuit = QuantumCircuit(2, 2)
circuit.rx(theta_val, 0)
circuit.ch(0, 1)
circuit = QuantumCircuit(2, 2)
circuit.rx(theta_val, 0)
circuit.cry(theta_val, 0, 1)
circuit.ch(1, 0)
circuit = QuantumCircuit(2, 2)
circuit.rx(theta_val, 0)
circuit.ry(theta_val, 1)
circuit.ch(1, 0)
circuit.rz(theta_val, 0)
circuit.ch(0, 1)
circuit.ry(theta_val, 0)
circuit.rz(theta_val, 1)