Probabilistic characteristics method for a one-dimensional inviscid scalar conservation law

In this paper, we are interested in approximating the entropy solution of a one-dimensional inviscid scalar conservation law starting from an initial condition with bounded variation owing to a system of interacting diffusions. We modify the system of signed particles associated with the parabolic equation obtained from the addition of a viscous term to this equation by killing couples of particles with opposite sign that merge. The sample paths of the corresponding reordered particles can be seen as probabilistic characteristics along which the approximate solution is constant. This enables us to prove that when the viscosity vanishes as the initial number of particles goes to + ∞, the approximate solution converges to the unique entropy solution of the inviscid conservation law. We illustrate this convergence by numerical results.