Faculty Directory
Gregory Ryskin

Associate Professor of Chemical and Biological Engineering


2145 Sheridan Road
Tech E136
Evanston, IL 60208-3109


Chemical and Biological Engineering


Ph.D., Chemical Engineering, California Institute of Technology, Pasadena, CA

Ph.D., Theoretical Physics, St. Petersburg Polytechnic Institute, St. Petersburg, Russia

Engineer-Physicist, St. Petersburg Polytechnic Institute, St. Petersburg, Russia

Research Interests

My research interests continue to evolve. The earlier papers listed here are concerned with fluid dynamics, polymer physics, Brownian motion, liquid crystals, and stochastic processes. I became interested in geology and geophysics in 2000. My current research is focused on cosmology.

Selected Publications

Vanishing vacuum energy, Astroparticle Physics 115, 102387 (2020)

The emergence of cosmic repulsion, Astroparticle Physics 62, 258-268 (2015) 

Boltzmann factor and Hawking radiation, Physics Letters B 734, 394-395 (2014) 

Abrupt global events in the Earth's history: a physics perspective, Reports on Progress in Physics 73, 122801 (2010) 

The late David Raup, “the world's most brilliant paleontologist”, wrote the following about the above paper: “Thanks for the manuscript. I find your message thrilling and a bit scary. …I sure hope you're right. It would solve a lot of problems with extinction. Right or wrong, you have convinced me that there has to be some sort of rather common (i.e., 1 myr time scale) environmental shock to explain extinction.” 

Secular variation of the Earth's magnetic field: induced by the ocean flow? New Journal of Physics 11, 063015 (2009) 

Methane-driven oceanic eruptions and mass extinctions, Geology 31, 741 - 744 (2003) 

Simple procedure for correcting equations of evolution: Application to Markov processes, Phys. Rev. E 56, 5123-5127 (1997) 

Drag force on a line defect moving through an otherwise undisturbed field: Disclination line in a nematic liquid crystal, G. Ryskin and M. Kremenetsky, Phys. Rev. Lett. 67, 1574-1577 (1991). 

Brownian motion in a rotating fluid: Diffusivity is a function of the rotation rate, Phys. Rev. Lett. 61, 1442-1445 (1988) 

Turbulent drag reduction by polymers: A quantitative theory, Phys. Rev. Lett. 59, 2059-2062 (1987)