Spectral independence in high-dimensional expanders and applications to the hardcore model

N Anari, K Liu, SO Gharan - SIAM Journal on Computing, 2021 - SIAM
We say a probability distribution μ is spectrally independent if an associated pairwise
influence matrix has a bounded largest eigenvalue for the distribution and all of its …

Rapid mixing of Glauber dynamics via spectral independence for all degrees

X Chen, W Feng, Y Yin, X Zhang - SIAM Journal on Computing, 2024 - SIAM
We prove an optimal lower bound on a spectral gap of the Glauber dynamics for
antiferromagnetic two-spin systems with vertices in the tree uniqueness regime. This …

Optimal mixing for two-state anti-ferromagnetic spin systems

X Chen, W Feng, Y Yin, X Zhang - 2022 IEEE 63rd Annual …, 2022 - ieeexplore.ieee.org
We prove an optimal Ω(n^-1) lower bound for modified \log-Sobolev (MLS) constant of the
Glauber dynamics for anti-ferromagnetic two-spin systems with n vertices in the tree …

Algorithms for# BIS-hard problems on expander graphs

M Jenssen, P Keevash, W Perkins - SIAM Journal on Computing, 2020 - SIAM
We give a fully polynomial-time approximation scheme (FPTAS) and an efficient sampling
algorithm for the high-fugacity hard-core model on bounded-degree bipartite expander …

Improved bounds for randomly sampling colorings via linear programming

S Chen, M Delcourt, A Moitra, G Perarnau… - Proceedings of the Thirtieth …, 2019 - SIAM
A well-known conjecture in computer science and statistical physics is that Glauber
dynamics on the set of k-colorings of a graph G on n vertices with maximum degree Δ is …

Entropic independence ii: optimal sampling and concentration via restricted modified log-Sobolev inequalities

N Anari, V Jain, F Koehler, HT Pham… - arXiv preprint arXiv …, 2021 - arxiv.org
We introduce a framework for obtaining tight mixing times for Markov chains based on what
we call restricted modified log-Sobolev inequalities. Modified log-Sobolev inequalities …

The Ising partition function: Zeros and deterministic approximation

J Liu, A Sinclair, P Srivastava - Journal of Statistical Physics, 2019 - Springer
We study the problem of approximating the partition function of the ferromagnetic Ising
model with both pairwise as well as higher order interactions (equivalently, in graphs as well …

Fast algorithms at low temperatures via Markov chains

Z Chen, A Galanis, LA Goldberg… - Random Structures …, 2021 - Wiley Online Library
Efficient algorithms for approximate counting and sampling in spin systems typically apply in
the so‐called high‐temperature regime, where the interaction between neighboring spins is …

Complexity results for MCMC derived from quantitative bounds

J Yang, JS Rosenthal - The Annals of Applied Probability, 2023 - projecteuclid.org
This paper considers how to obtain MCMC quantitative convergence bounds which can be
translated into tight complexity bounds in high-dimensional settings. We propose a modified …

Fast Sampling and Counting k-SAT Solutions in the Local Lemma Regime

W Feng, H Guo, Y Yin, C Zhang - Journal of the ACM (JACM), 2021 - dl.acm.org
We give new algorithms based on Markov chains to sample and approximately count
satisfying assignments to k-uniform CNF formulas where each variable appears at most d …