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 …

Counting independent sets up to the tree threshold

D Weitz - Proceedings of the thirty-eighth annual ACM …, 2006 - dl.acm.org
Consider the problem of approximately counting weighted independent sets of a graph G
with activity λ, ie, where the weight of an independent set I is λ| I|. We present a novel …

Rapid mixing from spectral independence beyond the Boolean domain

W Feng, H Guo, Y Yin, C Zhang - ACM Transactions on Algorithms …, 2022 - dl.acm.org
We extend the notion of spectral independence (introduced by Anari, Liu, and Oveis
Gharan) from the Boolean domain to general discrete domains. This property characterises …

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 …

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 …

Exact thresholds for Ising–Gibbs samplers on general graphs

E Mossel, A Sly - 2013 - projecteuclid.org
We establish tight results for rapid mixing of Gibbs samplers for the Ferromagnetic Ising
model on general graphs. We show that if (d-1)\tanhβ<1, then there exists a constant C such …

Randomly coloring sparse random graphs with fewer colors than the maximum degree

M Dyer, AD Flaxman, AM Frieze… - Random Structures & …, 2006 - Wiley Online Library
We analyze Markov chains for generating a random k‐coloring of a random graph Gn, d/n.
When the average degree d is constant, a random graph has maximum degree Θ (log n/log …

A near-linear time sampler for the Ising model with external field

X Chen, X Zhang - Proceedings of the 2023 Annual ACM-SIAM …, 2023 - SIAM
We give a near-linear time sampler for the Gibbs distribution of the ferromagnetic Ising
models with edge activities β> 1 and external fields λ< 1 (or symmetrically, λ> 1) on general …