Physics

• 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. Adv. Mater. 2405916 (2024) [article; preprint]
• High-fidelity cavity-mediated controlled-Z gate between double quantum dot qubits beyond the rotating-wave approximation.
  Guangzhao Yang, Marek Gluza, Si Yan Koh, Kelvin Onggadinata, 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. Phys. Rev. Lett. 132, 266801 (2024) [article; preprint]
• 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). [article; preprint]
• 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; erratum to supplemental material]
• 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; This article earned an Editor's Suggestion!]