UMD’s Christopher Jarzynski Awarded American Physical Society’s Lars Onsager Prize

College of Computer, Mathematical, and Natural Sciences

Jarzynski was honored for outstanding research in theoretical statistical physics The American Physical Society awarded its 2019 Lars Onsager Prize to Christopher Jarzynski, a Distinguished University Professor in the University of Maryland’s Department of Chemistry and Biochemistry, Department of Physics, and Institute for Physical Science and Technology (IPST). Jarzynski will receive the prize, which recognizes outstanding research in theoretical statistical physics, at the society’s March Meeting 2019 in Boston. 
“This particular award is very special to me because it’s named after Onsager, who was a real giant in theoretical statistical physics and is viewed as a founder of nonequilibrium statistical physics—the field that I work in,” Jarzynski said.
The award also demonstrates UMD’s strength in statistical physics, as the first Lars Onsager Prize was awarded in 1995 to Michael Fisher, a Distinguished University Professor Emeritus in IPST.
Statistical physicists use the tools of mathematics and statistics to investigate how atoms and molecules physically behave at extremely small scales, such as in quantum systems. More specifically, Jarzynski analyzes artificial molecular machines, develops efficient ways to compute the thermodynamic properties of complex systems and applies statistical physics to problems in biophysics. 
“Because my work lies on the border of chemistry and physics, it’s been really helpful for me to be at an institute where there are other people with interdisciplinary interests,” said Jarzynski, who is also director of IPST. “IPST brings together really wonderful colleagues who are generous with their time and effort.”
In May 2018, Jarzynski co-authored a study published in the journal Nature Physics that devised and demonstrated a new way to measure “free energy”—the energy available to any system to perform useful work—in extremely small systems. By using microscopy to track and analyze the fluctuating motion or configuration of single molecules or other small objects, the new method can be applied to a greater variety …

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