  Quantum machine learning (QML) requires significant quantum resources to
achieve quantum advantage. Research should prioritize both the efficient design
of quantum architectures and the development of learning strategies to optimize
resource usage. We propose a framework called quantum curriculum learning
(Q-CurL) for quantum data, where the curriculum introduces simpler tasks or
data to the learning model before progressing to more challenging ones. We
define the curriculum criteria based on the data density ratio between tasks to
determine the curriculum order. We also implement a dynamic learning schedule
to emphasize the significance of quantum data in optimizing the loss function.
Empirical evidence shows that Q-CurL significantly enhances the training
convergence and the generalization for unitary learning tasks and improves the
robustness of quantum phase recognition tasks. Our framework provides a general
learning strategy, bringing QML closer to realizing practical advantages.
