Leslie G. Valiant. Quantum Circuits That Can Be Simulated Classically in Polynomial Time. SIAM Journal on Computing, 31(4):1229-1254, 2002. [doi]
@article{Valiant02,
title = {Quantum Circuits That Can Be Simulated Classically in Polynomial Time},
author = {Leslie G. Valiant},
year = {2002},
url = {http://epubs.siam.org/sam-bin/dbq/article/37702},
researchr = {https://researchr.org/publication/Valiant02},
cites = {0},
citedby = {0},
journal = {SIAM Journal on Computing},
volume = {31},
number = {4},
pages = {1229-1254},
}