## Searching for Long Range Interaction in Lennard Jones Liquid

**Speaker:**Shan Huang

**When:**October 17, 2018 (Wed), 11:00AM to 12:00PM (add to my calendar)

**Location:**PRB 261

*This event is part of the Preliminary Oral Exam. *

Abstract: Lennard-Jones potential is a widely used approximation to describe interaction between molecules. The mathematical form of Lennard Jones potential shows that it is a short range interaction. However, recent researches found evidences of pseudo-spinodal nucleation in Liquid-Solid phase transition in Lennard-Jones dense liquid, which implies there is an effective long range interaction in those systems. In searching for numerical evidence of long range interaction in Lennard-Jones systems, we used damage algorithm. We found that in Ising model, speed of damage propagation is proportional to interaction range, while in Lenard-Jones systems, despite the bare interaction is of the same form, the damage propagation speed is proportional to density of particles. This implies that in Lennard-Jones systems the density has positive correlation with interaction range.

Examining Committee: William Klein, Harvey Gould, Claudio Rebbi, Wanzheng Hu, Karl Ludwig