School of Humanities and Sciences
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Associate Professor of Physics
Current Research and Scholarly InterestsProfessor Tompkins’s research focuses on understanding the relationships which govern matter’s most fundamental constituents. As a member of the ATLAS experiment at the Large Hadron Collider (LHC), she utilizes the world’s highest energy person-made particle collisions in order to understand the mechanism that gives particles mass, whether or not our current model of elementary particle interactions is a complete description of nature, and if dark matter can be produced and studied in colliders.
In order to search for the exceedingly rare interactions which may provide insight to these questions, the LHC will produce a blistering rate of 50 to 80 proton-proton collisions every 25 nanoseconds in 2015 and beyond. Professor Tompkins works on the design and implementation of custom electronics which will improve the ATLAS experiment’s ability to pick out the collisions which produce the Higgs bosons, dark matter particles and other rare events out of the deluge of ordinary interactions. Her group focuses on particles called heavy flavor fermions, the most massive particles not responsible for mediating interactions. Because they are so heavy, they may have a special connection to the origin of mass or physics beyond our current models of particle interactions.
She is additionally a member of the Light Dark Matter Experiment (LDMX), a proposed experiment to produce and detect dark matter in the laboratory utilizing an accelerated beam of electrons.
Job and Gertrud Tamaki Professor in the School of Humanities and Sciences, Emeritus
BioBorn in Philadelphia, Pennsylvania, Barry Trost began his university training at the University of Pennsylvania (BA, 1962) and completed his Ph.D. in Chemistry at the Massachusetts Institute of Technology (1965). He moved directly to the University of Wisconsin, where he was promoted to Professor of Chemistry and subsequently Vilas Research Professor. He joined the faculty at Stanford as Professor of Chemistry in 1987 and became Tamaki Professor of Humanities and Sciences in 1990. In addition to serving multiple visiting professorships, Professor Trost was presented with a Docteur honoris causa of the Université Claude-Bernard (Lyon I), France, and in 1997 a Doctor Scientiarum Honoris Causa of the Technion, Haifa, Israel. In recognition of his innovations and scholarship in the field of organic synthesis, Professor Trost has received the ACS Award in Pure Chemistry, ACS Award for Creative Work in Synthetic Organic Chemistry, Arthur C. Cope Scholar Award, and the Presidential Green Chemistry Challenge Award, among many others. Professor Trost has been elected a Fellow of the American Academy of Arts and Sciences, American Chemical Society, and American Association for the Advancement of Science, and a member of the National Academy of Sciences, and served as Chairman of the NIH Medicinal Chemistry Study Section. He has held over 125 special university lectureships and presented over 270 Plenary Lectures at national and international meetings. He has published two books and over 950 scientific articles. He edited a major compendium entitled Comprehensive Organic Synthesis consisting of nine volumes and serves on the editorial board for Science of Synthesis and Reaxys.
The Trost Group’s research program revolves around the theme of synthesis, including target molecules with potential applications as novel catalysts, as well as antibiotic and antitumor therapies. The work comprises two major activities: 1) developing the tools, i.e., the reactions and reagents, and 2) creating the proper network of reactions to make complex targets readily available from simple starting materials.
Efforts to develop "chemists' enzymes" – non-peptidic transition metal based catalysts that can perform chemo-, regio-, diastereo-, and especially enantioselective reactions – focus close attention to the question of atom economy to minimize waste, energy, and consumption of raw materials.
Synthetic efficiency raises the question of metal catalyzed cycloadditions to rings other than six-membered. A general strategy is evolving for a "Diels-Alder" equivalent for formation of five, seven, nine, etc. membered carbo- and heterocyclic rings.
An exciting new direction derives from the molecular gymnastics acetylenes undergo in the presence of transition metals. Additional specific goals include cycloisomerization to virtually all types of ring sizes and systems with particularly versatile juxtaposition of functionality.
Palladium and ruthenium catalysts represent a major part of the lab's efforts, in order to invent new synthetic processes together with new opportunities for selectivity complementary to that obtained using other metal complexes. Main group chemistry, especially involving silicon, zinc, and sulfur, also offers many opportunities for new reaction design. Rational design of novel catalysts for asymmetric additions to carbonyl and imine groups are an exciting thrust.From these new synthetic tools evolve new synthetic strategies towards complex natural products. Targets include β-lactam antibiotics, ionophores, steroids and related compounds (e.g., Vitamin D metabolites), alkaloids, nucleosides, carbohydrates, and macrolide, terpenoid, and tetracyclic antitumor and antibiotic agents.
Basic Life Research Scientist
BioHoward Hughes Medical Institute Fellow of The Helen Hay Whitney Foundation
The Dean and Virginia Morrison Professor of Population Studies
Current Research and Scholarly InterestsStochastic dynamics of human and natural populations; prehistoric societies; probability forecasts including sex ratios, mortality, aging and fiscal balance; life history evolution.