Limit law of a second class particle in TASEP with non-random initial condition

Understand

We consider the totally asymmetric simple exclusion process (TASEP) with non-random initial condition having density $\rho$ on $\mathbb{Z}_-$ and $\lambda$ on $\mathbb{Z}_+$, and a second class particle initially at the origin.

• For $\rho<\lambda$, there is a shock and the second class particle moves with speed $1-\lambda-\rho$.
• For large time $t$, we show that the position of the second class particle fluctuates on a $t^{1/3}$ scale and determine its limiting law.
• We also obtain the limiting distribution of the number of steps made by the second class particle until time $t$.