Fast Classical Simulation of Qubit-Qudit Hybrid Systems: Optimizing Efficiency in Classical Simulation of Multilevel Quantum Systems [Focus: Quantum Software and Its Engineering]

Simulating quantum circuits is a computationally intensive task. Here, we adopt a block simulation methodology applicable to qubit-qudit hybrid systems, which is approximately 10× to 1000× faster than the state-of-the-art simulator for simulating multilevel quantum systems.