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Efficient Algorithms for Approximating Quantum Partition Functions

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arxiv 2004.11568 v2 pith:NRVL3CJC submitted 2020-04-24 cs.DS cs.CCmath.COquant-ph

Efficient Algorithms for Approximating Quantum Partition Functions

classification cs.DS cs.CCmath.COquant-ph
keywords quantumalgorithmalgorithmsclusterexpansionfunctionspartitionanalysis
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We establish a polynomial-time approximation algorithm for partition functions of quantum spin models at high temperature. Our algorithm is based on the quantum cluster expansion of Neto\v{c}n\'y and Redig and the cluster expansion approach to designing algorithms due to Helmuth, Perkins, and Regts. Similar results have previously been obtained by related methods, and our main contribution is a simple and slightly sharper analysis for the case of pairwise interactions on bounded-degree graphs.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Efficient Algorithms for Weakly-Interacting Quantum Spin Systems

    quant-ph 2026-01 reject novelty 5.0

    A cluster-expansion FPTAS for the partition function and an approximate sampler for weakly-interacting quantum spin systems at arbitrary temperature are claimed, but a key bound in the proof fails.