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cond-mat.stat-mech2006★ 2 cited
Quantum Monte Carlo scheme for frustrated Heisenberg antiferromagnets
Jacek Wojtkiewicz
When one tries to simulate quantum spin systems by the Monte Carlo method, often the 'minus-sign problem' is encountered. In such a case, an application of probabilistic methods is…
cond-mat.stat-mech2004
Some properties of frustrated spin systems: extensions and applications of Lieb-Schupp approach
Jacek Wojtkiewicz
Lieb and Schupp have obtained, using certain version of ``spin-reflection positivity'' method, a number of ground-state properties for frustrated Heisenberg models. One group of th…