The power of various real-valued quantum queries. - Arvid J. Bessen (J. Complex., 2004)

Merlin-Arthur Games and Stoquastic Complexity - Sergey Bravyi 001; Arvid J. Bessen; Barbara M. Terhal (CoRR, 2006)

A lower bound for the Sturm-Liouville eigenvalue problem on a quantum computer. - Arvid J. Bessen (J. Complex., 2006)