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Efficient Markovian couplings: Examples and counterexamples
(Institute of Mathematical Statistics, 2000-05)
In this paper we study the notion of an efficient coupling of Markov processes. Informally, an efficient coupling is one which couples at the
maximum possible exponential rate, as given by the spectral gap. This notion is of interest not only for its own sake, but also of growing importance
arising from the recent advent ...