Fig. 2
From: Quantum granular-ball generation methods and their application in KNN classification
Quantum circuit for CRY gate. To achieve angular rotation of one qubit controlled by another qubit, the upper serves as the control bit, and the lower is the target bit initialized to \(\vert {0}\rangle\). \(RY(\theta )\) signifies a rotation of \(\theta\) degrees around the y-axis on the Bloch sphere.
