(Previously called the U3 gate) The three parameters allow the construction of any single-qubit gate. Has a duration of one unit of gate time.
Note about q-sphere representations
u(theta, phi, lam) q;
The q-sphere representation shows the state after the gate operates on the initial equal superposition state where is the number of qubits needed to support the gate.
In IBM Quantum Composer, the default value for
angle is .