Passcode: 862998

We present an active framework for advanced reconfigurable photonic systems that unifies classical and quantum information processing. On an active III-V semiconductor platform, we first demonstrate non-Hermitian topological light steering, enabling robust directional control of topological modes beyond conventional Hermitian constraints. Building on this, we realize co-propagating photonic topological interface states with hybridized pseudo-spins, where strategic non-Hermitian gain control enables tunable mode switching while preserving inherent topological protection. Leveraging this flexible non-Hermitian control, we construct a hybrid III-V/silicon photonic network that exploits non-Hermitian dynamics for reconfigurable, non-blocking switching and networking. Extending this approach to computation, we develop a reconfigurable photonic processor capable of performing both linear and nonlinear optical operations on-chip. Using a lithography-free integration approach, the processor achieves scalable, low-cost fabrication while maintaining high performance. Linear operations, such as matrix multiplication, are combined with field-programmable nonlinear computation functionalities, allowing dynamic implementation of nonlinear functions such as polynomials. This programmability enables in-situ reconfiguration of computational tasks, bridging conventional linear photonic circuits and complex nonlinear optical computing paradigms. Our platform provides a versatile route toward integrated photonic computing, neuromorphic processing, and real-time signal processing, establishing a unified framework for linear and nonlinear operations within a single processor. Finally, we extend active photonics to the quantum domain, demonstrating a classical-decisive quantum internet architecture capable of IP-compatible entanglement distribution over deployed fiber networks. Together, these advances establish a scalable, fault-tolerant platform that bridges topological photonics, non-Hermitian control, and quantum networking, paving the way for high-performance classical and quantum photonic technologies.