On explicit $L^2$-convergence rate estimate for piecewise deterministic Markov processes in MCMC algorithms

Understand

We establish $L^2$-exponential convergence rate for three popular piecewise deterministic Markov processes for sampling: the randomized Hamiltonian Monte Carlo method, the zigzag process, and the bouncy particle sampler.

• Our analysis is based on a variational framework for hypocoercivity, which combines a Poincar\'{e}-type inequality in time-augmented state space and a standard $L^2$ energy estimate.
• Our analysis provides explicit convergence rate estimates, which are more quantitative than existing results.