We study the long-time behavior of variants of the telegraph process with position-dependent jump-rates, which result in a monotone gradient-like drift toward the origin. We compute their invariant laws and obtain, via probabilistic couplings arguments, some quantitative estimates of the total variation distance to equilibrium. Our techniques extend ideas previously developed for a simplified piecewise deterministic Markov model of bacterial chemotaxis.
Pontificia Universidad Católica de Chile (PUC-Chile)
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Facultad de Ciencias Físicas y Matemáticas (FCFM)
Universidad de Chile
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Santiago – Chile