Linran Fan, The University of Texas at Austinn

"Hybrid nonlinear integrated photonics for quantum information processing"

Abstract: Quantum information science holds enormous potential to provide unprecedented capabilities in communication, computation, and precision measurement. Photonics will play a central role in future quantum technology, offering the unique and indispensable capability to conserve quantum coherence over long distances and inter-connect different quantum systems. This talk will present our efforts in developing hybrid integrated photonic platforms, which enable the exploration of new quantum phenomena, the development of novel quantum information functions, and the improvement of quantum device performance. I will first discuss the demonstration of quantum interference between cascaded second-order and intrinsic third-order nonlinear processes, leading to the first observation of single-photon Fano resonances. Next, I will focus on the first on-chip generation of high-dimensional hyper-entanglement using quantum frequency comb interference. A new protocol to implement quantum information processing in the photonic frequency domain will also be discussed. Furthermore, I will present our recent result in the demonstration of record-high optical nonlinear efficiency, which is critical to improve the quality of quantum state generation and the efficiency of quantum frequency conversion. Lastly, I will finish the talk by discussing how our hybrid integrated photonic platforms can provide new opportunities to push forward the frontier of quantum information science.