Pseudorandomness for Read-Once, Constant-Depth Circuits
Pseudorandomness for Read-Once, Constant-Depth Circuits
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一次性读取、恒定深度电路的伪随机性
DOI:
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发表时间:
2015
期刊:
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通讯作者:
S. Vadhan
中科院分区:
文献类型:
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作者:
Sitan Chen;T. Steinke;S. Vadhan
For Boolean functions computed by read-once, depth-D circuits with unbounded fan-in over the de Morgan basis, we present an explicit pseudorandom generator with seed length ~ O(log D+1 n). The previous best seed length known for this model was ~ O(log D+4 n), obtained by Trevisan and Xue (CCC ‘13 ) for all of AC 0 (not just read-once). Our work makes use of Fourier analytic techniques for pseudorandomness introduced by Reingold, Steinke, and Vadhan (RANDOM ‘13 ) to show that the generator of Gopalan et al. (FOCS ‘12 ) fools read-once AC 0 . To this end, we prove a new Fourier growth bound for read-once circuits, namely that for every F :f0; 1g n !f0; 1g computed by a read-once, depth-D circuit, X