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Wiki page for course QT5201U (Quantum control technology) - AY2026/27S1

This will be the place for documenting projects. To be able to write something to this wiki, we need to create a user login manually. If you have not yet created an account, do let me know - Christian.

Next class: Mon 17 Aug 2026 in the seminar room S15 level 5.

Project pages

Example project title

One sentence, describing what this project is is about.

Team members: A, B, C

QKD receiver characterization (Polarization)

Calibrated polarization-state generator to characterize polarization analysis modules in QKD receivers and rigorously quantify the impact on secure key rates.

Team members: Elias X. Huber, various AI agents (open to join forces with other humans as well, you can reach me at elias.x.huber[at typical nus sufix]; please note though that I will likely do the experiment at UTown (CREATE Tower), my schedule tends to be a bit inflexible for team-work, and I am a theorist with no lab experience).

Control and measurement in the bosonic cQED system

Using control and measurement methods to characterize a dispersively coupled single superconducting cavity and single transmon qubit system, with a thorough review of the theories and experimental techniques behind it.

Team members: Grace Pang and Seungwon Jin

Multi-tone RFSoC driver for an AOM

A multi-tone RF synthesizer on an RFSoC board to drive an acousto-optic modulator(AOM).

Team members: Mani Aarthy

Placeholder for project title

TBD. Team members Wang Ziyan and Wu Jinbin

Laser Phase Offset Lock

We plan to implement an offset lock to phase stabilize a pair of External Cavity Diode Lasers (ECDL) at a fixed offset of 6.8 GHz, matching the Rb87 ground state hyperfine transition.

Team members: Bibhuti Thapa, Xu Zifang, Chan Jun Jie

Home-Built ECDL and Optical Sideband Generation

The project includes the construction and characterization of a Littrow ECDL, microwave-driven EOM sideband generation near 6.8 GHz, and optical beat-note techniques for relative frequency stabilization with an existing Rb87 trapping laser.

Team member: Liu Yiming

Thermal Drift Compensation via RF and DC Feedback for Thermal Device Control Applications

We plan to calibrate a thermally tunable microring resonator, compensate TEC-induced thermal drift using DC feedback, and evaluate gesture-image reconstruction through the AC channel.

Team members: Huang He, Ding Jiahao, Xu Anbang

Measurement of Coherent States in Phase Space

Team members: Lim Zi Way, Raghav Sah, Shawn Liew Hong Wei

Design and Construction of a Confocal Microscope for Photonic Material Characterization

Team members: Kim Sihyung, Ankush Sharma, Liang Shuyi

Resources

Some hopefully useful references should go here.

Recommended literature

• Bahaa E. A. Saleh, Malvin Carl Teich: Fundamentals of Photonics, Wiley; available as e-book in NUS. Excellent reference book for many optics topics.
• Mark Fox: Quantum Optics: An Introduction, Oxford University Press; available as e-book in NUS. Nice book on traditional quantum optics topics.
• Christopher C. Davis: Lasers and electro-optics, Cambridge; available as e-book in NUS. Good overall book on optics-related aspects useful for controlling quantum systems.

Recorded classes

Date	Topic	Description	Reference
17.8.2026	Paraxial ray optics	A recap of how to deal with classical ray optics through ABCD matrices	Saleh, Teich: Fundamentals of Photonics
18.8.2026	Paraxial wave optics	Working towards Gaussian beams found with lasers...	same as above
24.8.2026	Optical cavities 1	Fabry-Perot, simple 1D dimensional
25.8.2026	Optical cavities 2	Transverse mode structure, optical coating basics
14.9.2026	Homo- and heterodyning basics	Radiofrequency origins of mixers, optical version	any quantum optics text (e.g. Mark Fox, see above)
15.9.2026	Optical Modularors 1	Mostly Electro-optical modulators, some LCD as well	e.g. Davis: Laser and Electro-optics

Complete playlist: https://www.youtube.com/playlist?list=PLN-Fk1m9cTD4

Previous version of this course wiki

• AY2012S2: https://ay2021s2.qt5201.org

Getting started

Consult the User's Guide for information on using the wiki software.

• MediaWiki FAQ
• Math can be entered in LaTeX style: <math>r^2=\sqrt{x^2+y^2}</math> renders as $r^2=\sqrt{x^2+y^2}$
• Should you miss any module or functionality of this wiki, please contact me (Christian Kurtsiefer).