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Computer Simulations of Quantum Chains

Wolfhard Janke·Tilman Sauer
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Abstract

We report recent progress in computer simulations of quantum systems described in the path-integral formulation. For the example of the $ϕ^4$ quantum chain we show that the accuracy of the simulation may greatly be enhanced by a combination of multigrid update techniques with a refined discretization scheme. This allows us to assess the accuracy of a variational approximation.

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Wolfhard Janke, Tilman Sauer. 1996-09-29. Computer Simulations of Quantum Chains. https://arxiv.org/abs/cond-mat/9609278

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