HSING-TA (THETA)CHEN Department of Chemistry University of Pennsylvania 908-489-4996 231 S

HSING-TA (THETA)CHEN Department of Chemistry University of Pennsylvania 908-489-4996 231 S. 34 Street, 263 Cret [email protected] Philadelphia, PA 19104 [email protected]

CURRENT POSITION Postdoctoral Researcher, University of Pennsylvania, PA 1/2017 – Present - Developed mixed quantum-classical electrodynamics theory and simulation - Analyzed semiclassical simulation of resonance energy transfer and molecular spectroscopy - Explored strong coupling quantum optics using semiclassical and numerically exact approaches

EDUCATION Columbia University, NY 10/2016 Ph.D. in Chemical Physics (Advisor: Prof. David Reichman) Thesis: Delving Into Dissipative Quantum Dynamics: From Approximate to Numerically Exact Approaches. Thesis committee: Prof. Bruce Berne, Prof. Andrew Millis, Prof. Richard Friesner, Prof. Seogjoo Jang National Taiwan University, Taiwan 6/2010 M.Sc. in Physics (Advisor: Prof. Shih-I Chu) Thesis: Generalized Floquet approach for time-dependent electron transport: memory effect on the photon-assisted tunneling via a single quantum dot. National Taiwan University, Taiwan 6/2006 B.Sc. in Physics B.Sc. in Mathematics

RESEARCH EXPERIENCE Visiting Scholar, IAMS, Academia Sinica, Taiwan 7/2019 – 8/2019 Visiting Postdoctoral Researcher, SLAC/Stanford University, CA 1/2017 – 7/2017 Sackler Postdoctoral Fellow, Tel Aviv University, Israel 6/2016 – 8/2016 Ph.D. Thesis Research, Columbia University, NY 6/2012 – 6/2016 Research Assistant, Center for Quantum Science and Engineering, Taiwan 7/2010 – 7/2011

PUBLICATIONS [17] Tao E. Li, Hsing-Ta Chen, Abraham Nitzan, Joseph E. Subotnik, Quasiclassical Modeling of Cavity Quantum Electrodynamics. arXiv:1910.02299 (2019) [16] Zeyu Zhou, Hsing-Ta Chen, Abraham Nitzan, Joseph E. Subotnik, Non-adiabatic Dynamics in a Laser Field with Floquet Fewest Switches Surface Hopping: The Need for An Accurate Treatment of Coherence and De- coherence Remains. arXiv:1909.11695 (2019) [15] Tao E. Li, Hsing-Ta Chen, Abraham Nitzan, Joseph E. Subotnik, Understanding the nature of mean-ﬁeld semiclassical light-matter dynamics: An investigation of energy transfer, electron-electron correlations, exter- nal driving, and long-time detailed balance arXiv:1908.01401 (2019) [14] Hsing-Ta Chen, Tao E. Li, Abraham Nitzan, Joseph E. Subotnik, Understanding Detailed Balance for a Electron–Radiation System Through Mixed Quantum–Classical Electrodynamics. Physical Review A 100, 010101(R) (2019). [13] Hsing-Ta Chen, Tao E. Li, Abraham Nitzan, Joseph E. Subotnik, Predictive Semiclassical Model for Coherent and Incoherent Emission in the Strong Field Regime: The Mollow Triplet Revisited. Journal of Physical Chemistry Letters 10, 1331 (2019). [12] Tao E. Li, Hsing-Ta Chen, Joseph E. Subotnik, Comparison of different classical, semiclassical and quantum treatments of light-matter interactions: understanding energy conservation. Journal of Chemical Theory and Computation, 15, 1957 (2019).

1 [11] Hsing-Ta Chen, Tao E. Li, Maxim Sukharev, Abraham Nitzan, Joseph E. Subotnik, Ehrenfest+R dynamics. II. A semiclassical QED framework for Raman scattering. Journal of Chemical Physics 150, 044103 (2019) [10] Hsing-Ta Chen, Tao E. Li, Maxim Sukharev, Abraham Nitzan, Joseph E. Subotnik, Ehrenfest+R dynamics. I. A mixed quantum–classical electrodynamics simulation of spontaneous emission. Journal of Chemical Physics 150, 044102 (2019) [9] Tao E. Li, Hsing-Ta Chen, Abraham Nitzan, Maxim Sukharev, Joseph E. Subotnik, A Necessary Trade-off for Semiclassical Electrodynamics: Accurate Short-Range Coulomb Interactions versus the Enforcement of Causality? Journal of Physical Chemistry Letter, 9, 5955 (2018) [8] Tao E. Li, Abraham Nitzan, Maxim Sukharev, Todd Martinez, Hsing-Ta Chen, and Joseph E. Subotnik, Mixed Quantum-Classical Electrodynamics: Understanding Spontaneous Decay and Zero Point Energy. Physical Review A 97, 032105 (2018) [7] Hsing-Ta Chen, Guy Cohen, and David R. Reichman, Inchworm Monte Carlo for exact non-adiabatic dynamics I. Theory and algorithms. Journal of Chemical Physics 146, 054105 (2017) [6] Hsing-Ta Chen, Guy Cohen, and David R. Reichman, Inchworm Monte Carlo for exact non-adiabatic dynamics II. Benchmarks and comparison with established methods. Journal of Chemical Physics 146, 054106 (2017) [5] Hsing-Ta Chen, Timothy Berkelbach, and David R. Reichman, On the Accuracy Of the Padé–Resummed Mas- ter Equation Approach To Dissipative Quantum Dynamic. Journal of Chemical Physics 144, 154106 (2016) [4] Hsing-Ta Chen, Guy Cohen, Andrew Millis, and David R. Reichman, Anderson-Holstein model in two ﬂavors of the noncrossing approximation. Physical Review B 93, 174309 (2016) [3] Hsing-Ta Chen and David R. Reichman, On the Accuracy of Surface Hopping Dynamics in Condensed Phase Non-adiabatic Problems. Journal of Chemical Physics 144, 154106 (2016) [2] Hsing-Ta Chen, Tak-San Ho, and Shih-I Chu, Exploration of the memory effect on the photon-assisted tunneling via a single quantum dot: A generalized Floquet theoretical approach. International Journal of Modern Physics B, 25 2251 (2011) [1] Tak-San Ho, Shih-Han Hung, Hsing-Ta Chen, and Shih-I Chu, Memory effect on the multiphoton coherent destruction of tunneling in the electron transport of nanoscale systems driven by a periodic ﬁeld: A generalized Floquet approach. Physical Review B 79, 235323 (2009)

PRESENTATIONS Invited Talks • “Mixed Quantum-Classical Electrodynamics: what can we learn from semiclassical electronic-nuclear dynamics?” Quantum Materials and Dynamics (QMD) seminar, University of Torento (2019) • “Mixed Quantum-Classical Light-Matter Interactions.” Institute of Atomic and Molecular Sciences, Academia Sinica, Taiwan (2019) • “Dissipative Quantum Dynamics: From Approximate to Numerically Exact Approaches.” Institute of Atomic and Molecular Sciences, Academia Sinica, Taiwan (2017) • “Is decoherence always necessary in conjunction with the surface hopping algorithm?” Inaugural Meeting of Taiwan Theoretical and Computational Molecular Sciences Association (T2CoMSA), Hsinchu, Taiwan (2014) Conference Posters • “An Intuitive Model for Photoexcitation and Spectroscopy: Lessons from Molecular Dynamics.” Gordon Re- search Conference (GRC) on Plasmonically-Powered Processes, Hong Kong, China (2019) • “How do we capture spontaneous emission with mixed quantum-classical dynamics?” Gordon Research Con- ference (GRC) on Molecular Interactions and Dynamics, Easton, MA (2018) • “Inchworm Quantum Monte Carlo for exact non-adiabatic dynamics.” American Conference on Theoretical Chemistry (ACTC), Boston, MA (2017) • ”Inching Past the Dynamical Sign Problem: Real Time Monte Carlo for the Spin–Boson Model. Centre Eu- ropéen de Calcul Atomique et Moléculaire (CECAM) workshop on "Open Quantum Systems: Computational Methods", Hong Kong, China (2015) • “Is decoherence always necessary in conjunction with the surface hopping algorithm?” American Conference

2 on Theoretical Chemistry (ACTC), Telluride, CO (2014) • “Memory Effect on Multi-Photon Coherent Destruction of Tunneling in Electron Transport of Nanoscale Sys- tems Driven by a Periodic Field: A Generalized Floquet Approach.” Division of Atomic, Molecular and Optical Physics Meeting of American Physical Society (APS-DAMOP), Houston, TX (2010) • “Memory Effect on Multi-Photon Coherent Destruction of Tunneling in Electron Transport of Nanoscale Sys- tems Driven by a Periodic Field: A Generalized Floquet Approach.” Conference on Computational Physics (CCP), Kaohsiung, Taiwan (2009)

FELLOWSHIPSAND AWARDS Fellowships • Sackler Postdoctoral Fellow, The Raymond and Beverly Sackler Center for Computational Molecular and Ma- terials Science, Tel Aviv University (2016) • Columbia-Upjohn Fellow, Department of Chemistry, Columbia University (2013–2014) • Faculty Fellow, Graduate School of Arts and Science, Columbia University (2011–2013) Awards • GSAS Travel Award, Graduate School of Arts and Science, Columbia University (2014) • Outstanding Presentation Award, Theoretical and Computational Chemistry Association in Taiwan (2014) • Student Thesis Award, Taiwan Physical Society (2010)

TEACHINGAND MENTORING University Teaching Experience • Columbia University: Physical Chemistry, General Chemistry • National Taiwan University: Classical Electrodynamics, Quantum Mechanics Mentorship of Students • University of Pennsylvania: graduate students in the Subotnik and Nitzan groups

REFERENCES Professor Joseph Subotnik Department of Chemistry, University of Pennsylvania 215-746-7078/ [email protected] Professor Abraham Nitzan Department of Chemistry, University of Pennsylvania and Tel Aviv University 215-898-2518/ [email protected] Professor David Reichman Department of Chemistry, Columbia University 212-854-0469/ [email protected] Professor Bruce Berne Department of Chemistry, Columbia University 212-854-2186/ [email protected]