Title
Pseudorandom Generators from Polarizing Random Walks
Abstract
We propose a new framework for constructing pseudorandom generators for n-variate Boolean functions. It is based on two new notions. First, we introduce fractional pseudorandom generators, which are pseudorandom distributions taking values in [-1, 1](n). Next, we use a fractional pseudorandom generator as steps of a random walk in [-1, 1](n) that converges to {-1, 1}(n). We prove that this random walk converges fast (in time logarithmic in n) due to polarization. As an application, we construct pseudorandom generators for Boolean functions with bounded Fourier tails. We use this to obtain a pseudorandom generator for functions with sensitivity s, whose seed length is polynomial in s. Other examples include functions computed by branching programs of various sorts or by bounded depth circuits.
Year
DOI
Venue
2019
10.4230/LIPIcs.CCC.2018.1
Leibniz International Proceedings in Informatics
Keywords
DocType
Volume
AC0,branching program,polarization,pseudorandom generators,random walks,Sensitivity
Journal
102
Issue
ISSN
Citations 
1
1868-8969
0
PageRank 
References 
Authors
0.34
0
4
Name
Order
Citations
PageRank
Eshan Chattopadhyay18411.71
Pooya Hatami29414.40
Kaave Hosseini300.68
Shachar Lovett452055.02