Xiasong Ma, Yale University
The advantages of single photons make them not only the workhorse of testing the foundations of quantum physics against the classical interpretation of nature, but also suitable for various tasks in quantum information processing. In my talk, I will first present our long-distance quantum teleportation with active feed-forward in real time. This experiment uses both quantum and classical optical links over 143 km free space between the two Canary Islands of La Palma and Tenerife and is a major step towards quantum communication on a global scale. Then, I will focus on the recent development of integrated quantum circuits and present our demonstration of on-chip interaction-free measurements via the quantum Zeno effect. By taking the inherent advantages of the lithographically written waveguides, we employ wave-particle duality of single photons and the quantum Zeno effect to sense the presence of absorbers even if the photons and the absorbers haven’t interacted. Finally, I will discuss the opportunities and challenges for improving the scalability of photonic quantum systems.