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An Improvement on the Negative Sign Problem in Numerical Calculations of a Quantum Spin System

Tomo Munehisa·Yasuko Munehisa
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Abstract

We propose new approach to numerical study of quantum spin systems. Our method is based on a fact that one can use any set of states for the path integral as long as it is complete. We apply our method to one-dimensional quantum spin system with next-to-nearest neighbor interactions. We found remarkable improvement in negative sign problem.

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Tomo Munehisa, Yasuko Munehisa. 1993-06-23. An Improvement on the Negative Sign Problem in Numerical Calculations of a Quantum Spin System. https://doi.org/10.1103/physrevb.49.3347

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