Princeton University

School of Engineering & Applied Science

Harnessing Single Photons in Quantum Technology

Dr. Xiao-Song Ma
E-Quad, B205
Monday, February 23, 2015 - 4:30pm

Quantum technology employs the ‘spooky’ phenomena of quantum physics such as superposition, randomness and entanglement to process information in a novel way. Quantum photonics provides a promising path for both delivering quantum-enhanced technologies and exploring fundamental physics.
In this talk, I will first present our work on long-distance free-space quantum teleportation. Quantum and classical channels were employed over 143 kilometers between two Canary Islands (La Palma to Tenerife). We successfully teleported the quantum states of single photons from La Palma to Tenerife. This demonstration represents a major step towards the realization of quantum communication on a global scale.
It is foreseeable that future technologies will require integrated optics architecture for enhanced performance, miniaturization and scalability. In the second part of my talk, I will cover our recent endeavors along this line, including demonstrations of on-chip interaction-free measurements via the quantum Zeno effect, as well as on-chip quantum interference. Finally, I will discuss the opportunities and challenges for improving the scalability of photonic quantum systems.

Xiao-Song Ma is a Marie Curie postdoc fellow in Department of Electrical Engineering at Yale University. His main research interests are in experimental implementations of photonic quantum information processing. The spectrum of his research covers quantum nano-photonics, quantum communication, simulation and foundations of quantum physics. He received his Bachelor’s degree from Nanjing University in 2003, Master’s degree from Leiden University in 2005 and Ph.D degree from University of Vienna in 2010.