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

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

1993-06-23

arxiv.org/abs/cond-mat/9306049v1

Physics

Condensed Matter

11 pages, LaTeX, figures on request, YAMANASHI-93-01

Scientific paper

10.1103/PhysRevB.49.3347

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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