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Efficient Algorithms for Approximating Quantum Partition Functions at Low Temperature

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arxiv 2201.06533 v2 pith:NXVFKJV6 submitted 2022-01-17 quant-ph cs.CCcs.DSmath.CO

Efficient Algorithms for Approximating Quantum Partition Functions at Low Temperature

classification quant-ph cs.CCcs.DSmath.CO
keywords quantumspinsystemsalgorithmborgsefficientfunctionspartition
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We establish an efficient approximation algorithm for the partition functions of a class of quantum spin systems at low temperature, which can be viewed as stable quantum perturbations of classical spin systems. Our algorithm is based on combining the contour representation of quantum spin systems of this type due to Borgs, Koteck\'y, and Ueltschi with the algorithmic framework developed by Helmuth, Perkins, and Regts, and Borgs et al.

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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.