Faculty

Hans
C.
Andersen

Professor (b. 1941)
Education: 
B.S., 1962; Ph.D., 1966, Massachusetts Institute of Technology
Awards: 

Sloan Foundation Fellow, 1972-74;
John Simon Guggenheim Fellowship, 1976-77;
Hildebrand Award of the American Chemical Society, 1988;
Member, National Academy of Sciences, 1992;
Dean's Award for Distinguished Teaching, Stanford, 1992;
Theoretical Chemistry Award, American Chemical Society, 2006

Chemistry Research Area: 
Physical
Phone: 
650-723-2711
Email: 
hca@stanford.edu

Principal Research Interests

Our research program uses both traditional statistical mechanical theory and molecular dynamics computer simulation methods to study systems of chemical and physical interest. A major activity in the group at this time is the study of relaxation in low temperature liquids, with the aim of understanding the properties of supercooled liquids and the nature of the glass transition. We do computer simulation studies of the molecular motion and relaxation in models of liquids as well as studies of simple lattice models of liquids and polymers that can display complex relaxation behavior. We develop analytical kinetic theories to describe the same types of systems. A particularly useful approach we are developing is that of constructing theories of lattice models, of more realistic models of atomic and molecular liquids, and of models of polymeric liquids, that have a similar formal structure. The simpler systems can be studied in great detail, and insights about theoretical techniques and approximations that work for the simple systems can then be applied to clarify the analysis of the more realistic and complex models. We use computer simulation results to provide critical tests of analytical theory. Other topics of recent interest are the development of methods for constructing coarse grained models to study molecular systems on long time scales.

Representative Publications

1) "A diagrammatic formulation of the kinetic theory of fluctuation in equilibrium classical fluids. VI. Binary collision approximations for the memory function for self-correlation functions," J.E. Noah-Vanhoucke and H.C. Andersen, J. Chem. Phys., 0127, 064502 (2007).

2) "Boson peak in supercooled liquids: Time domain observations and mode coupling theory,"H. Cang, J. Li, H.C. Andersen, and M.D. Fayer, J. Chem. Phys., 123, 064508 (2005).

3) "Diagrammatic kinetic theory for a lattice model of a liquid. II. Comparison of theory and simulation results," E.H. Feng and H.C. Andersen, J. Chem. Phys., 121, 3598 (2004).

4) "Diagrammatic formulation of the kinetic theory of fluctuations in equilibrium classical fluids. III. Cluster analysis of the renormalized interactions and a second diagrammatic representation of the correlation functions," H.C. Andersen, J. Phys. Chem. B., 107, 10234-10242 (2003).

5) "A diagrammatic theory of time correlation functions of facilitated kinetic Ising models," S.J. Pitts and H.C. Andersen, Journal of Chemical Physics, 114, 1101 (2001).