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Alexander Ling Group

Our group is working to bring optical quantum technology out of the lab and into the field – and even into orbit. Such field-tests of quantum mechanics pave the way for developing applications of quantum physics.

One of our team's major goals is the development of complete entangled photon experiments that are palm-sized and suitably ruggedized for use on small satellites (CubeSats or larger), and other low-resource mobile platforms. This compares to typical lab-based entanglement experiments which run in a protected environment without severe space or power constraints.

For the satellite instrument development, we tie many different branches of physics together. Our work involves a lot of system design and integration, low-power radiation-tolerant electronics and elegant opto-mechanical design. For example, proton-induced displacement damage is a major concern, and team members have been both studying radiation models in space and conducting tests on devices to understand the impact of radiation on the lifetime of our experiments.

We have also pioneered the testing of quantum systems at the edge of space using high-altitude balloons. In one recent test, instruments were carried to an altitude of 37km and successfully recovered. The test data reveal that the control systems worked flawlessly and we are looking forward to more advanced field tests.

Looking to the future, we anticipate that integrated photonics will play a large role in the miniaturisation of quantum systems. Our team also has an effort aimed at studying waveguide structures as sources of quantum entanglement, as well as studying how complete experiments may be fabricated on a single chip.

Undergraduates are encouraged to join our team for exposure to cutting-edge experimental optics.



Alexander Ling
(Principal Investigator)
Email: cqtalej@nus.edu.sg
Office: S15-02-03
Phone:+65 6516 2985
Fax:+65 6516 6897

Group Member

Alexander Ling (Principal Investigator) Karthik Ilangovan (Research Associate)
James Grieve (Senior Research Fellow) Arian Stolk (Research Assistant)
Alexander Lohrmann (Research Fellow) Lew Wai Cheong Lincoln (Research Assistant)
Bai Xueliang (Research Fellow) Ng Kian Fong (Research Assistant)
Chithrabhanu Perumangatt (Research Fellow) Nguyen Hong Nhung (Research Assistant)
Filip Auksztol (Research Fellow) Soe Moe Thar (Research Assistant)
Letizia Ventura (Research Fellow) Tang Zhongkan Kamiyuki (Research Assistant)
Md. Tanvirul Islam (Research Fellow) Aitor Villar Zafra (CQT PhD Student)
Rakhitha Chandrasekara (Research Fellow) Aswin Alexander Eapen (PhD Student (Physics Dept, NUS))
Robert Bedington (Research Fellow) Tang Zong Sheng (CQT PhD Student)