Techniques are provided for routing qubit data. For example, one or more embodiments described herein can include a computer-implemented method for training a quantum controller fast path interface that can control the routing of the qubit data. The computer-implemented method can include training, by a system operably coupled to a processor, the quantum controller fast path interface for routing qubitdata bits between a quantum controller and a conditional engine by adjusting a delay value such that an equalized clock domain is characterized by a direct register-to-register transfer mode.