Tunable quantum interference using a topological source of indistinguishable photon pairs
Indistinguishable photon pairs and their quantum interference is a fundamental resource enabling many quantum applications such as quantum teleportation, quantum metrology, quantum communications and quantum computing. There is a growing need to generate these photon sources on-chip to create the next-generation integrated nano-photonic devices. Photon pairs are commonly produced using spontaneous parametric down-conversion (SPDC) or spontaneous-four wave mixing(SFWM). On-chip photon pairs produced through SFWM have an added advantage over SPDC of being easily scalable and not requiring special materials. However, disorder during fabrication processes changes the device functionality and makes the scalability of these devices ineffective. One prominent solution to the problem is to use topological edge states which were shown to be robust against fabrication-induced disorder.
(pizza and drinks served 10 min. before talk)