Photonic Approaches to Realizing Quantum Computers

A quantum computer serves as a platform for executing quantum algorithms that exhibit significant advantages over classical computational methods in solving certain problems. Among the various proposed physical implementations, photonic technology has emerged as a strategic pathway toward achieving universal quantum processors, thanks to its inherent compatibility with quantum communication and sensing systems. In the field of photonic quantum computing, two promising approaches have attracted particular attention: the continuous-variable (CV) approach, which operates based on the measurement-based computational model, and the single-photon approach, which utilizes the fusion-based computational model. This talk will explore the physical and computational principles underlying each of these approaches, highlighting their strengths, implementation challenges, and scalability potential within photonic platforms. The goal of this presentation is to provide a comprehensive overview of the diverse development pathways for photonic quantum computing systems and to outline the future prospects of this transformative technology.