内容：

Quantum computers have the potential to solve problems that are intractable for classical computers. However, building a universal, fault-tolerant quantum computer remains a significant technological challenge. Before fully fledged quantum computers become available, a more immediate question is what can be achieved with current and near-term quantum hardware. In this talk, I will first review quantum algorithms designed for near-term and fault-tolerant quantum computers. I will then discuss applications of quantum computing across several directions and briefly introduce our collaborations with experimental groups. Finally, I will discuss the necessity of quantum error correction and explore the prospects for achieving quantum advantage in the early fault-tolerant era.