initGate

Create an initialization gate that initializes three target qubits to amplitudes between pi/4 and 2*pi.

cg = initGate(1:3,pi/4*(1:8))

cg = 
  CompositeGate with properties:

             Name: "init"
    ControlQubits: [1x0 double]
     TargetQubits: [1 2 3]
            Gates: [3x1 quantum.gate.CompositeGate]

Plot the initialization gate. The plotted gate consists of three inverse UCRY gates. The first inverse UCRY gate acts on qubit 1, the second inverse UCRY gate acts on qubits 1 and 2, and the third inverse UCRY gate acts on qubits 1, 2, and 3.

plot(cg)

Simulate a quantum circuit with the initialization gate. Here, the global phase is 0.28/pi.

s = simulate(quantumCircuit(cg));
formula(s)

ans = 
    "0.070014 * |000> +
     0.14003  * |001> +
     0.21004  * |010> +
     0.28006  * |011> +
     0.35007  * |100> +
     0.42008  * |101> +
     0.4901   * |110> +
     0.56011  * |111>"

Create an initialization gate for six target qubits. Use a basis string to initialize three qubits to the $\left|+\right.anglebracketright$ state and three qubits to the $\left|-\right.anglebracketright$ state.

cg = initGate(1:6,"+++---")

cg = 
  CompositeGate with properties:

             Name: "init"
    ControlQubits: [1x0 double]
     TargetQubits: [1 2 3 4 5 6]
            Gates: [9x1 quantum.gate.SimpleGate]

Plot the initialization gate.

plot(cg)

Simulate a quantum circuit with the initialization gate and verify that the qubits are initialized to the input state, up to a global phase.

s = simulate(quantumCircuit(cg));
formula(s)

ans = 
"1 * |+++--->"