Measurement of enhanced spin-orbit coupling strength for donor-bound electron spins in silicon.
Radha Krishnan, Beng Yee Gan, Yu-Ling Hsueh, A.M. Saffat-Ee Huq, Jonathan Kenny, Rajib Rahman, T.S. Koh, Michelle Y. Simmons, Bent Weber. (2024) [preprint: arXiv:2404.15762]
High-Fidelity CZ Gates in Double Quantum Dot - Circuit QED Systems Beyond the Rotating-Wave Approximation.
Guangzhao Yang, Marek Gluza, Si Yan Koh, Calvin Pei Yu Wong, Kuan Eng Johnson Goh, Bent Weber, Hui Khoon Ng, T.S. Koh, (2024) [preprint: arXiv:2404.06187]
Robust Nuclear Spin Polarization via Ground-State Level Anti-Crossing of Boron Vacancy Defects in Hexagonal Boron Nitride. Shihao Ru, Zhengzhi Jiang, Haidong Liang, Jonathan Kenny, Hongbing Cai, Xiaodan Lyu, Robert Cernansky, Feifei Zhou, Yuzhe Yang, Kenji Watanabe, Takashi Taniguchi, Fuli Li, T.S. Koh, Xiaogang Liu, Fedor Jelezko, Andrew A. Bettiol, and Weibo Gao. (2023) [preprint: arXiv:2306.15960]
Symmetry breaking and spin-orbit coupling for individual vacancy-induced in-gap states in MoS2 monolayers.
Thasneem Aliyar, Hongyang Ma, Radha Krishnan, Gagandeep Singh, Yitao Wang, Bi Qi Chong, Ivan Verzhbitskiy, Calvin Pei Yu Wong, Kuan Eng Johnson Goh, Ze Xiang Shen, T.S. Koh, Rajib Rahman, and Bent Weber. Nano Lett. 24, 2142-2148 (2024) [article]
Donor-based silicon quantum technologies.
Elizabeth Marcellina, Kuan Eng Johnson Goh, T.S. Koh, and Bent Weber. 2023 Roadmap for Materials for Quantum Technologies. Mater. Quantum. Technol. 3 012501 (2023) [article (open access)].
Excited-state optically detected magnetic resonance of spin defects in hexagonal boron nitride.
Zhao Mu, Hongbing Cai, Disheng Chen, Jonathan Kenny, Zhengzhi Jiang, Shihao Ru, Xiaodan Lyu, T.S. Koh, Xiaogang Liu, Igor Aharonovich, and Weibo Gao. Phys. Rev. Lett. 128, 216402 (2022). [article]
Ghost factors in Gauss-sum factorization with transmon qubits.
Lin Htoo Zaw, Yuanzheng Paul Tan, Long Hoang Nguyen, Rangga P. Budoyo, Kun Hee Park, Zhi Yang Koh, Alessandro Landra, Christoph Hufnagel, Yung Szen Yap, T.S. Koh, and Rainer Dumke. Phys. Rev. A 104, 062606 (2021). [preprint, article]
Two-qubit sweet spots for capacitively coupled exchange-only spin qubits.
MengKe Feng, Lin Htoo Zaw, and T. S. Koh. npj Quant. Inf. 7, 112 (2021). [article ; preprint; presentation]
Coherent transfer of singlet-triplet qubit states in an architecture of triple quantum dots.
MengKe Feng, Chang Jian Kwong, T. S. Koh, and Leong Chuan Kwek. Phys. Rev. B 97, 245428 (2018). [article ; preprint]
Characterizing gate operations near the sweet spot of an exchange-only qubit.
J. Fei, J.-T. Hung, T. S. Koh, Y.-P. Shim, S. N. Coppersmith, X. Hu, and Mark Friesen. Phys. Rev. B 91, 205434 (2015). [article ; preprint]
Fast coherent manipulation of three-electron states in a double quantum dot.
Z. Shi, C. B. Simmons, D. R. Ward, J. R. Prance, Xian Wu, T. S. Koh, J. K. Gamble, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson. Nat. Commun. 5, 3020 (2014). [article ; preprint]
Quantum control and process tomography of a semiconductor quantum dot hybrid qubit.
Dohun Kim, Z. Shi, C. B. Simmons, D. R. Ward, J. R. Prance, T. S. Koh, J. K. Gamble, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and Mark A. Eriksson. Nature 511, 70 (2014). [article ; preprint]
Coherent quantum oscillations and echo measurements of a Si charge qubit.
Z. Shi, C. B. Simmons, D. R. Ward, J. R. Prance, R. T. Mohr, T. S. Koh, J. K. Gamble, X. Wu, D. E. Savage, M. G. Lagally, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson. Phys. Rev. B 88, 075416 (2013). [article ; preprint]
High-fidelity gates in quantum dot spin qubits.
T. S. Koh, S. N. Coppersmith, and Mark Friesen. Proc. Nat. Acad. Sci. 110, 19695 (2013). [article ; preprint]
A fast "hybrid" silicon double quantum dot qubit.
Z. Shi, C. B. Simmons, J. R. Prance, J. K. Gamble, T. S. Koh, Y.-P. Shim, X. Hu, D. E. Savage, M. G. Lagally, M. A. Eriksson, Mark Friesen, and S. N. Coppersmith. Phys. Rev. Lett. 108, 14050 (2012). [article ; preprint]
Pulse-gated quantum-dot hybrid qubit.
T. S. Koh, J. K. Gamble, M. A. Eriksson, Mark Friesen, and S. N. Coppersmith. Phys. Rev. Lett. 109, 250503 (2012). [article ; preprint]
Unconventional Transport in the “Hole” Regime of a Si Double Quantum Dot.
T. S. Koh, C. B. Simmons, M. A. Eriksson, S. N. Coppersmith, and Mark Friesen. Phys. Rev. Lett. 106, 186801 (2011). [article ; preprint]
Tunable Spin Loading and T1 of a Silicon Spin Qubit Measured by Single-Shot Readout.
C. B. Simmons, J. R. Prance, B. J. van Bael, T. S. Koh, Z. Shi, D. E. Savage, M. G. Lagally, R. Joynt, Mark Friesen, S. N. Coppersmith, and M. A. Eriksson. Phys. Rev. Lett. 106, 156804 (2011). [article ; preprint]
Pauli spin blockade and lifetime-enhanced transport in a Si/SiGe double quantum dot.
C. B. Simmons, T. S. Koh, N. Shaji, M. Thalakulam, L. J. Klein, H. Qin, H. Luo, D. E. Savage, M. G. Lagally, A. J. Rimberg, R. Joynt, R. Blick, Mark Friesen, S. N. Coppersmith, M. A. Eriksson. Phys. Rev. B 82, 245312 (2010). [article ; preprint]
Publications
Learning to become ignorant: Improving the quality of epistemic knowledge in science education.
Tan, M., & Koh, T. S. (2022). Science Education, Vol 107, Issue 1, pp9-27, January 2023. First published 08 July 2022. [article (html) ; article (pdf) This paper earned a Top Downloaded Article award!]
Reimagining the Singapore pre-university biology curriculum with computational thinking.
Chew, A. C. Y., Lee Y. X., Koh T. S., Sze C. C., & Goh, W. W. B. (2021). Asian Journal of the Scholarship of Teaching and Learning, 11(2). 130-141. [article(html) ; article(pdf)]
The Singapore Young Physicists’ Tournament Fosters Teachers’ and Students’ Orientation Towards the Practices of Science.
Koh, T. S., & Tan, M. (2020). NIE Research Brief Series No. 20-022. Singapore: National Institute of Education. [article]
Conference proceedings
Representation and Performance
Michael Tan, Anna Chew, S. Y. Ho, and T. S. Koh. Australian Association for Research in Education (2019), Brisbane, Australia.
On improving students understanding of the photoelectric effect.
Y. P. Chee, S. K. Munirah, C. C. Lim, and T. S. Koh. Proc. Third Redesigning Pedagogy International Conference (2009), Singapore. [article (pdf)]
On improving students understanding of the photoelectric effect.
Y. P. Chee, S. K. Munirah, C. C. Lim, T. S. Koh, C. Y. Lau, D. Wong, Lyna, P. Lee, and S. K. Foong. Proc. Frontiers in Science Education Research Conference (March 2009), ed. A. Bilsel and M. Garip (Famagusta: Eastern Mediterranean University Press).
YouTube presentation
Development of Computational Thinking and Computational Approaches in Undergraduate Electromagnetism.
Jeremy Lian. FYP supervised by T.S. Koh. https://youtu.be/fuQvmvAab-M
Undergraduate Theses (for most NTU theses, you may access them via NTU Digital Repository)
AY2023/24
Ashley Ang, Topological quantum computing - the poor man's Majorana
Abishai Jacob Mathai, Kalman Filter analysis of rain-induced fluctuations of local gravity
Ashwinie Ganesh, Higher-order product formula in the double bracket iteration quantum algorithm
AY2022/23
Ma Chiyuan Mark, Photonic states generation in a double-quantum dot-resonator system
(NUS Research Institute, Suzhuo, China. Co-supervised with Hui Khoon Ng, NUS)
Li Zhuofan, Blue sideband transition in a driven hybrid qubit-resonator system
(NUS Research Institute, Suzhuo, China. Co-supervised with Hui Khoon Ng, NUS)
AY2021/22
Lee Shong Yan, Decoherence in a central spin model.
AY2020/21
Koh Zhi Yang, Bayesian quantum noise spectroscopy.
Carrin Henry, Counterfactual quantum cryptography.
Geraldine Chong, Towards a quantum internet.
Teo Soon Han Bryan, Privacy vs security concerns in a world with govt-owned quantum computers.
Julianna Yap, Agent-based model of voting behaviour in elections - trust and quantum technology.
AY2019/20
Zaw Lin Htoo, Randomised benchmarking with gate-dependent noise.
Woo Ying Zheng, The role of tunneling noise in triple spin exchange qubits.
Jeremy Lian, Teaching Electromagnetism with computational tools
AY2018/19
Joel Yuen, Lindblad master equation: applications to tunneling current.
Soh Zi Yuan, Hearing shape.
AY2017/18
Lee Tuck Chong, Numerical investigation of leakage in resonant exchange qubit.
Zhu Pei, Multi-staged tesla valve logic gates.
AY2016/17
Livardy Wufianto, Fidelity of quantum state transfer of a quantum dot spin qubit.
URECA, Odyssey and CNYSP Projects
Yang Guangzhao, Optimal CZ gate in a double quantum dot-resonator system (AY22/23)
Yang Guangzhao, Orbital modeling of double quantum dot dipole moments (AY21/22)
Chong Bi Qi, Bayesian inference in a bi-exponential decay model (AY21/22)
Fong Wan Hang, Driven double quantum dot-resonator system (AY21/22)
Dyah Ayu Nurun Nafisah, Machine Learning approach to Quantum Noise Spectroscopy. (AY20/21)
Chen Jianjun, Quantum noise spectroscopy - a comparative noise modelling perspective. (AY20/21)
Pang Teng Chen Ietro, Bayesian inference of single spin lifetime in a quantum dot. (AY19/20 - 20/21)
Koh Zhi Yang, Quantum noise spectroscopy. (AY19/20)
Carrin Henry, Counterfactual quantum cryptography. (AY19/20)
Gan Beng Yee, Co-tunneling spectroscopy in double quantum dots (AY18/19)
Joseph Sebastian Ang, Wigner's friend. (AY18/19)
Jeremy Lien, Curie point engine (I). (AY17/18)
Lim Zhi Yuen, Curie point engine (II). (AY17/18)
Kon Wen Yu, Spin dynamics in perovskites. (AY17/18)
Yeoh Kirk Ming, Bell inequalities in quantum dot spin qubits. (AY17/18)