JP
J.K. Pietrzak
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Quantum gate scheduling assigns start cycles to quantum-circuit operations while respecting precedence, resource, and hardware constraints. Although schedules are commonly evaluated by makespan, it is only an indirect proxy for execution reliability, since schedules of equal duration may differ in gate errors, idle-time decoherence, and crosstalk exposure. This thesis investigates whether reinforcement learning benefits from domain knowledge in quantum gate scheduling. Building on qgym’s scheduling environment, we evaluate Maskable Proximal Policy Optimization against greedy ASAP and ALAP baselines on Random, GHZ, QFT, and QAOA circuit families using IBM calibration data. We study commutation-awareness, which relaxes unnecessary ordering constraints between commuting gates, and hardware-awareness, which injects calibration data through extended observations and/or a log-ESP-based reward. The main finding is that commutation-awareness is the most reliable improvement: it reduces makespan by approximately 20% for QAOA and Random circuits, while giving little benefit for GHZ and QFT circuits. Furthermore, noise-aware observation space proves promising for further research.
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Quantum gate scheduling assigns start cycles to quantum-circuit operations while respecting precedence, resource, and hardware constraints. Although schedules are commonly evaluated by makespan, it is only an indirect proxy for execution reliability, since schedules of equal duration may differ in gate errors, idle-time decoherence, and crosstalk exposure. This thesis investigates whether reinforcement learning benefits from domain knowledge in quantum gate scheduling. Building on qgym’s scheduling environment, we evaluate Maskable Proximal Policy Optimization against greedy ASAP and ALAP baselines on Random, GHZ, QFT, and QAOA circuit families using IBM calibration data. We study commutation-awareness, which relaxes unnecessary ordering constraints between commuting gates, and hardware-awareness, which injects calibration data through extended observations and/or a log-ESP-based reward. The main finding is that commutation-awareness is the most reliable improvement: it reduces makespan by approximately 20% for QAOA and Random circuits, while giving little benefit for GHZ and QFT circuits. Furthermore, noise-aware observation space proves promising for further research.