Some Properties of Markov chains on the Free Group F₂

Random walks cannot, in general, be pushed forward by quasi-isometries. Tame Markov chains were introduced as a ‘quasi-isometry invariant’ generalization of random walks. In this paper, we construct several examples of tame Markov chains on the free group exhibiting ‘exotic’ behavior; one, where the drift is not well defined and one where the drift is well defined but the Central Limit Theorem does not hold. We show that this is not a failure of the notion of tame Markov chain, but rather that any quasi-isometry invariant theory that generalizes random walks will include examples without well-defined drift.