Spectral independence in high-dimensional expanders and applications to the hardcore model
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 …
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 …
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
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 …
Gharan) from the Boolean domain to general discrete domains. This property characterises …
Rapid mixing of Glauber dynamics via spectral independence for all degrees
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 …
antiferromagnetic two-spin systems with vertices in the tree uniqueness regime. This …
Optimal mixing for two-state anti-ferromagnetic spin systems
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 …
Glauber dynamics for anti-ferromagnetic two-spin systems with n vertices in the tree …
Improved bounds for randomly sampling colorings via linear programming
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 …
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
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 …
we call restricted modified log-Sobolev inequalities. Modified log-Sobolev inequalities …
Exact thresholds for Ising–Gibbs samplers on general graphs
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 …
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
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 …
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 …
models with edge activities β> 1 and external fields λ< 1 (or symmetrically, λ> 1) on general …