Mathematical aspects of mixing times in Markov chains
Foundations and Trends® in Theoretical Computer Science
Random Structures & Algorithms
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The Thorp shuffle is defined as follows. Cut a deck of cards into two equal piles. Drop the first card from the left pile or the right pile according to the outcome of a fair coin flip, then drop from the other pile. Continue this way until both piles are empty. We show that the mixing time for the Thorp shuffle with $2^d$ cards is polynomial in $d$.