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Stephen H. Yuwono Awarded Longuet-Higgins Early Career Researcher Prize 

Chemistry graduate student Stephen Yuwono. Courtesy photo
Chemistry graduate student Stephen Yuwono. Courtesy photo

MSU Chemistry Ph.D. student Stephen H. Yuwono, who works in Professor Piotr Piecuch's group, has been awarded the prestigious Longuet-Higgins Early Career Researcher Prize awarded by the Editors of Molecular Physics for his article “Accelerating convergence of equation-of-motion coupled-cluster computations using the semi-stochastic CC(P;Q) formalism,” Molecular Physics 2020, 118:19-20, e1817592, which was named the journal’s best paper in 2020.

The Longuet-Higgins Early Career Researcher Prize, which includes a generous stipend from the publisher, Taylor & Francis, is given annually to a researcher who has written and published a top-quality article in Molecular Physics the previous year and within five years of being awarded their Ph.D. Authors who have not yet completed their Ph.D. can be awarded the prize as well. Stephen’s winner’s profile can be found in the article Molecular Physics 2021, 119:24, e2003963. The official announcement of his receipt of the Longuet-Higgins prize was published in the article Molecular Physics 2021, 119:24, e2010864.

Stephen’s paper, co-authored by Arnab Chakraborty and Dr. Jun Shen from the Piecuch group, Dr. J. Emiliano Deustua, who worked in the Piecuch group until his graduation in May 2020 and is presently at Caltech, and Professor Piotr Piecuch, addresses the issue of developing prac­tical computational methods based on the equation-of-motion coupled-cluster (EOMCC) theory capable of accurately describing excited electronic states that emerge in studies of photochemistry and photoinduced reactivity. The key idea of this work is the identification of the leading wave function components of the parent EOMCC approach with the help of stochastic configuration interaction Quantum Monte Carlo sampling, followed by the determination of CC(P;Q) corrections to capture the remaining many-electron correlation effects.

Stephen, originally from Indonesia, did his undergraduate chemistry studies at the National University of Singapore, earning a Bachelor of Science degree in 2015. He then joined a graduate chemistry program at the University of North Texas, before transferring to the MSU Chemistry Department in 2016. He currently is a senior Ph.D. student working under the supervision of Professor Piotr Piecuch. He plans to defend his doctoral dissertation in 2022.

For the press release on the College of Natural Science website, please see https://natsci.msu.edu/news/chemistry-graduate-student-wins-prestigious-early-career-award/.