Definitionen
1.AdjectiveOf a Hermitian matrix, having real non-positive off-diagonal elements. These matrices have elements of quantum mechanics and classical theory of stochastic matrices. For non-technical purposes ‘stoquastic’ is equivalent to “avoiding the sign problem”.
2.Adjective↑ Sergey Bravyi: “Monte Carlo Simulation Of Stoquastic Hamiltonians.” Quantum Information & Computation, volume 15, issue 13&14, October 2015, pp. 1122–1140. Page 1123.