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2026-10-05T06:06:55Z

Ling chen: /* Project pages */

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

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

===[[FPGA-Based Magnetic Field Sensing and Control]]===
'''Team members:''' Zhou Jinyu, Yang Jintao

===[[Generation and Control of Dual-Polarization Electro-Optic Frequency Combs in a Microresonator]]===

'''Team members:''' Deng Boyang, Ling Chen

==Resources==
Some hopefully useful references should go here.
===Recommended literature===
* Bahaa E. A. Saleh, Malvin Carl Teich: Fundamentals of Photonics, Wiley; available as [https://libproxy1.nus.edu.sg/login?url=https://search.ebscohost.com/login.aspx?direct=true&db=nlebk&AN=26193&site=ehost-live&ebv=EB&ppid=pp_Cover e-book in NUS]. Excellent reference book for many optics topics.
* Mark Fox: Quantum Optics: An Introduction, Oxford University Press; available as [https://libproxy1.nus.edu.sg/login?url=https://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=208564 e-book in NUS]. Nice book on traditional quantum optics topics.
* Christopher C. Davis: Lasers and electro-optics, Cambridge; available as [https://libproxy1.nus.edu.sg/login?url=https://dx.doi.org/10.1017/CBO9781139016629 e-book in NUS]. Good overall book on optics-related aspects useful for controlling quantum systems.

===Recorded classes===

{| class="wikitable"
!Date !! Topic !! Description !! Reference

|-
| 17.8.2026
| [https://youtu.be/tUuzyOVIlxk Paraxial ray optics]
| A recap of how to deal with classical ray optics through ABCD matrices
| Saleh, Teich: Fundamentals of Photonics

|-
| 18.8.2026
| [https://youtu.be/lSKFl8u21_w Paraxial wave optics]
| Working towards Gaussian beams found with lasers...
| same as above

|-
| 24.8.2026
| [https://youtu.be/2HZCak7ODlM Optical cavities 1]
| Fabry-Perot, simple 1D dimensional
|
|-

| 25.8.2026
| [https://youtu.be/GEa3ktnrMrg Optical cavities 2]
| Transverse mode structure, optical coating basics
|
|-

| 14.9.2026
| [https://youtu.be/Lwt6eJe12h0 Homo- and heterodyning basics]
| Radiofrequency origins of mixers, optical version
| any quantum optics text (e.g. Mark Fox, see above)
|-

| 15.9.2026
| [https://youtu.be/2nhP60FKstQ Optical Modularors 1]
| Mostly Electro-optical modulators, some LCD as well
| e.g. Davis: Laser and Electro-optics
|-

| 28.9.2026
| [https://youtu.be/9sV3LqsYefY Optical Modularors 2]
| Acousto-optical Modulators
| e.g. Davis: Laser and Electro-optics
|-

| 29.9.2026
| [https://youtu.be/WHXhpIAZ_Tc Optical Fibers]
| Optical Fibers
| a good reference: Saleh, Teich: Fundamentals of Photonics
|-

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

==Previous version of this course wiki==
* AY2012S2: https://ay2021s2.qt5201.org

== Getting started ==
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