PME Special Seminar: Alp Sipahigil, University of California Berkeley

The past decade witnessed major advances in our ability to engineer integrated quantum systems. A growing number of industrial efforts are now focusing on scaling quantum technologies based on these platforms. In this talk, I will present our work on addressing outstanding device physics challenges to enable next-generation integrated microwave, phononic, and photonic quantum technologies. Silicon photonics is the backbone of our modern telecommunication infrastructure and builds on decades of semiconductor manufacturing expertise. However, its application to quantum computation and communication is currently limited by the lack of strong spin-photon and photon-photon interactions. I will discuss a new approach to address this challenge using recently discovered telecom-band quantum emitters in silicon. I will present our first- principles search for an ideal defect in silicon1,2,3, and discuss experiments demonstrating indistinguishable photon generation from a single silicon defect for the first time4. I will conclude by discussing our recent progress towards realizing an integrated photonic quantum repeater node and advancing superconducting quantum processors via defect engineering.