Andris Ambainis, Nikolajs Nahimovs. Improved Constructions of Quantum Automata. In Yasuhito Kawano, Michele Mosca, editors, Theory of Quantum Computation, Communication, and Cryptography, Third Workshop, TQC 2008, Tokyo, Japan, January 30 - February 1, 2008. Revised Selected Papers. Volume 5106 of Lecture Notes in Computer Science, pages 47-56, Springer, 2008. [doi]
Abstract is missing.