Quantum master equations: time-tested classics for single-time observables, but how good are they for multi-time correlation functions, like the ones probed in spectroscopy? Read Jonathan's paper, Linear and nonlinear spectroscopy from quantum master equations, to find out!
Can we use atomically-thin semiconductors as optical sensors of the local chemical environment? Read Yeongsu's paper, Environmentally-Sensitive Theory of Electronic and Optical Transitions in Atomically-Thin Semiconductors, to find out why it's harder than you think!
Farewell to pseudopotentials! Gaussian and plane-wave mixed density fitting for periodic systems has been posted to the arXiv.
We have received a Start-Up Research Grant from the US-Israel Binational Science Foundation to study the role of low-frequency nuclear fluctuations in soft semiconductors in collaboration with Omer Yaffe's group at the Weizmann Institute!
Bryan Lau (Ph.D. Northwestern University) joins the group as a postdoctoral researcher. Welcome, Bryan!
Malte receives the Nathan Sugarman Teaching Award in General Chemistry!
University of Chicago undergraduate Shi-Ning Sun joins the group!
Tim visits nearby Northwestern and gives a talk at the Northwestern-Argonne Solar Energy Research Center (ANSER).
Tim and Greg Scholes organize a Focus session on Spectroscopy and Dynamics of Multichromophore Systems at APS March Meeting.
Gaussian-Based Coupled-Cluster Theory for the Ground State and Band Structure of Solids has been accepted for publication in the Journal of Chemical Theory and Computation.
We contribute to the open-source PySCF software package, especially concerning excited-state and condensed-phase electronic structure. A preprint describing the capabilities and design philosophy of PySCF has been posted to the arXiv: The Python-based Simulations of Chemistry Framework (PySCF).
Tim gives an invited talk at the 18th Total Energy and Force Methods workshop, held at ICTP.
B.A. NYU (2009)
Ph.D. Columbia University (2014)
Fellow at PCTS (2014-2016)
B.A. Seoul National University (2015)
B.A. Rutgers University (2016)
B.S. University of Washington (2016)
B.S. University of Toronto (2011)
Ph.D. Northwestern University (2017)
B.S. University of Chicago (expected 2018)
We work on a variety of quantum-mechanical problems motivated by excited-state phenomena. This research occurs at the fascinating interface of physical chemistry, condensed-matter physics, and materials science.
Building on modern theories of quantum dynamics, we develop powerful simulation techniques for nonequilibrium and time-resolved spectroscopies. These new tools enable the accurate simulation of extremely large and complex sytems, providing new insights into excited-state structure and dynamics.
We are actively exploring the excited-state behavior of fundamentally interesting and technologically promising materials, especially those that are anisotropic, layered, or low-dimensional. Particular materials of interest include conjugated polymers, organic molecular crystals, and quasi-two-dimensional inorganic semiconductors.
Aiming towards highly accurate but insightful descriptions of electronic excitations, we formulate and apply electronic structure methods adapted for the condensed phase. Some of our favorite tools are low-energy effective theories, many-body diagrammatics, and coupled-cluster techniques.
Timothy Berkelbach is the Neubauer Family Assistant Professor in the Department of Chemistry and the James Franck Institute at the University of Chicago. He received his B.A. in physics and chemistry from NYU in 2009 and his Ph.D. in chemical physics from Columbia University in 2014, where he was a Department of Energy Office of Science Graduate Research Fellow advised by David Reichman. Before coming to the University of Chicago, Tim spent two years as a fellow of the Princeton Center for Theoretical Science, working closely with Garnet Chan and his group.
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