Table 2.

Different RL methods for quantum control applications.

Quantum applications	Control level	Adopted RL methods
Quantum state preparation	Hamiltonian control	DQN [52,170,171]
		Policy gradient [171]
		PPO [155]
Quantum gate control	Hamiltonian control	DQN [162]
		Policy gradient [172]
Extreme spin squeezing	Hamiltonian control	PPO [159]
Quantum metrology	Hamiltonian control	A3C [57]
		DDPG [163]
Quantum compiler	Gate control	DQN [55,167]
Quantum state engineering	Measurement based	DQN [170]
Quantum state stabilization	Measurement based	DQN [169]
		PPO[54]
Quantum error correction	Measurement based	Policy gradient [51]
		PPO [48,54]