Title
Improved mixing time bounds for the thorp shuffle
Abstract
E. Thorp introduced the following card shuffling model. Suppose the number of cards is even. Cut the deck into two equal piles, then interleave them as follows. Choose the first card from the left pile or from the right pile according to the outcome of a fair coin flip. Then choose from the other pile. Continue this way, flipping an independent coin for each pair, until both piles are empty. We prove an upper bound of Od3 for the mixing time of the Thorp shuffle with 2d cards, improving on the best known bound of Od4. As a consequence, we obtain an improved bound on the time required to encrypt a binary message of length d using the Thorp shuffle.
Year
DOI
Venue
2013
10.1017/S0963548312000478
Combinatorics, Probability & Computing
Keywords
Field
DocType
thorp shuffle,equal pile,e. thorp,following card shuffling model,time bound,fair coin,markov chain,mixing time.,left pile,right pile,independent coin,binary message,mixing time
Pile,Discrete mathematics,Fair coin,Combinatorics,Upper and lower bounds,Encryption,Deck,Shuffling,Mathematics,Binary number
Journal
Volume
Issue
ISSN
22
1
0963-5483
Citations 
PageRank 
References 
3
0.45
3
Authors
1
Name
Order
Citations
PageRank
Ben Morris11278.78