  We revisit the contour dynamics (CD) simulation method which is applicable to
large deformation of distribution function in the Vlasov-Poisson plasma with
the periodic boundary, where contours of distribution function are traced
without using spatial grids. Novelty of this study lies in application of CD to
the one-dimensional Vlasov-Poisson plasma with the periodic boundary condition.
A major difficulty in application of the periodic boundary is how to deal with
contours when they cross the boundaries. It has been overcome by virtue of a
periodic Green's function, which effectively introduces the periodic boundary
condition without cutting nor reallocating the contours. The simulation results
are confirmed by comparing with an analytical solution for the piece-wise
constant distribution function in the linear regime and a linear analysis of
the Landau damping. Also, particle trapping by Langmuir wave is successfully
reproduced in the nonlinear regime.
