Self-adapting method for the localization of quantum critical points using quantum Monte Carlo techniques

A generalization to the quantum case of a recently introduced algorithm [Tomita and Okabe, Phys. Rev. Lett. 86, 572 (2001)] for the determination of the critical temperature of classical spin models is proposed. We describe a simple method to automatically locate critical points in (Quantum) Monte Carlo simulations. The algorithm assumes the existence of a finite correlation length in at least one of the two phases surrounding the quantum …