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Tensor Network Loop Cluster Expansions for Quantum Many-Body Problems

2025/10/07 by Gray, Johnnie, Park, Gunhee, Evenbly, Glen +3 · 3 citations
#FOS: Physical sciences #Quantum Physics (quant-ph)

paper · doi:10.48550/arxiv.2510.05647

Abstract

We analyze the tensor network loop cluster expansion, introduced in arXiv:2504.07344 as a systematic correction to belief propagation, in the context of general quantum many-body problems. We provide numerical examples of the accuracy and practical applicability of the approach for the computation of ground-state observables for high bond dimension tensor networks, in two- and three-dimensions, with open and periodic boundary conditions, and for spin and fermion problems.

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