Daoheng Niu Final Defense

Abstract: Quantum computing and quantum communication offer potential advantages over their classical counterparts, yet near-term applications face two main challenges: scalability, limited by the number of controllable qubits, and fidelity, affected by quantum noise. This talk will focus on strategies to tackle these challenges. First, to address scalability, I will present a quantum tensor network-based algorithm for qubit-efficient quantum simulation of correlated electrons, and I will compare circuit-based quantum computing with the potentially more scalable photonic measurement-based quantum computing. Next, to improve fidelity, I will show the application of quantum error-correcting codes and measurement-based error correction in long-distance quantum communication. Additionally, I will discuss the effects of quantum noise on random quantum circuits and its impact on demonstrating quantum advantage.