Article
Statistics & Probability
Tom Hutchcroft
Summary: This study proves that under certain conditions, there is no infinite cluster at the critical parameter in long-range Bernoulli percolation on Z(d), while also providing a new power-law upper bound. As part of the proof, a universal inequality is established, leading to a new rigorous hyperscaling inequality involving the cluster-volume exponent and two-point function exponent.
PROBABILITY THEORY AND RELATED FIELDS
(2021)
Article
Statistics & Probability
J. van den Berg, D. G. P. van Engelenburg
Summary: This study discusses critical site percolation problem and obtains some results regarding the two-arms exponent. Currently, the upper bound for this exponent is still unknown.
ANNALES DE L INSTITUT HENRI POINCARE-PROBABILITES ET STATISTIQUES
(2022)
Article
Multidisciplinary Sciences
Juan Monsalve, Juan Rada
Summary: A topological index based on vertex degrees was defined for directed graphs, extending the concept for graphs, finding sharp lower and upper bounds, and determining extremal values for specific types of networks such as oriented trees and orientations of fixed graphs.
Article
Physics, Multidisciplinary
Sheng Fang, Zongzheng Zhou, Youjin Deng
Summary: Through extensive simulations, we have found that the Ising model exhibits two upper critical dimensions in the random-cluster representation. The critical behavior of the clusters, except the largest one, is governed by percolation universality. Our findings significantly advance the understanding of the Ising model, which is a fundamental system in many branches of physics.
CHINESE PHYSICS LETTERS
(2022)
Article
Physics, Mathematical
Svetlana Jitomirskaya, Wencai Liu
Summary: This study presents a simple method, not based on transfer matrices, to demonstrate the vanishing of dynamical transport exponents, which is applied to long-range quasiperiodic operators. Published by AIP Publishing under an exclusive license.
JOURNAL OF MATHEMATICAL PHYSICS
(2021)
Article
Mathematics, Applied
Vladimir Zolotov
Summary: We apply the Thom-Milnor theorem to obtain upper bounds on the amount of critical points in various problems, including Maxwell's problem on point charges, SINR, potential generated by fixed Newtonian point masses with a quadratic term, and central configurations in the n-body problem.
ANALYSIS AND MATHEMATICAL PHYSICS
(2023)
Article
Statistics & Probability
Vivek Dewan, Stephen Muirhead
Summary: In this paper, we prove upper bounds on the one-arm exponent eta(1) for a class of dependent percolation models that extend Bernoulli percolation. Our main focus is on level set percolation of Gaussian fields, but the arguments also apply to other models in the Bernoulli percolation universality class. We use exploration and relative entropy arguments to develop a new approach, as existing proofs for Bernoulli percolation do not extend to dependent percolation models. Additionally, we utilize a new Russo-type inequality for Gaussian fields to demonstrate the sharpness of the phase transition and the mean-field bound for finite-range fields.
PROBABILITY THEORY AND RELATED FIELDS
(2023)
Article
Mathematics
Antonia Jabbour, Stephane Sabourau
Summary: We prove that every local supremum of the systole over the space of Riemannian metrics of curvature at most -1 on a given nonsimply connected closed surface is attained by a hyperbolic metric. As an application, we also present a partial extension of this result to 3-manifolds.
MATHEMATISCHE ANNALEN
(2023)
Article
Physics, Mathematical
Akira Sakai
Summary: This paper presents some research results on the lace expansion of the Ising two-point function. The author successfully derived the expansion equation and provided diagrammatic bounds on the expansion coefficients. However, a flaw was recently found in the proof of a key lemma, leading to the need for a new proof to fix the issue.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2022)
Article
Mathematics, Applied
Anupama Roy, Neelima Gupte
Summary: The study reveals that the transition to synchronization on hierarchical lattices can be either continuous or explosive, depending on the structure of the lattice. These transitions exhibit different critical exponents and critical behaviors.
Article
Mathematics, Applied
Alexei Ilyin, Anna Kostianko, Sergey Zelik
Summary: This study investigates the dependence of the fractal dimension of global attractors for the damped 3D Euler-Bardina equations on the regularization parameter and Ekman damping coefficient. Explicit upper bounds are presented for different boundary conditions. The sharpness of these estimates is demonstrated in the 3D Kolmogorov flows on a torus in the limit.
PHYSICA D-NONLINEAR PHENOMENA
(2022)
Article
Optics
Kurt Schab, Lukas Jelinek, Miloslav Capek, Mats Gustafsson
Summary: Upper bounds on the focusing efficiency of aperture fields and lens systems are proposed using integral equation representations of Maxwell's equations and Lagrangian duality. Two forms of focusing efficiency based on lens exit plane fields and optimal polarization currents are considered. The bounds are compared with classical prescriptions and inverse design lenses, showing that unbounded focusing efficiency can be achieved with lens exit plane fields. Additionally, aperture fields based on time-reversal do not necessarily yield optimal lens focusing efficiency in near-field focusing.
Article
Statistics & Probability
David Dereudre
Summary: This article discusses the bond percolation model on a lattice, including questions of existence, uniqueness, phase transition, DLR equations, and the threshold for bond percolation in different dimensions.
PROBABILITY THEORY AND RELATED FIELDS
(2022)
Article
Physics, Fluids & Plasmas
Alessandro Galvani, Giacomo Gori, Andrea Trombettoni
Summary: The study investigates the relationship between magnetization profiles of models with marginal interaction terms and solutions to the Yamabe problem in a domain characterized by constant curvature. General formulas in terms of Weierstrass elliptic functions are found for saddle-point equations, extending known exact results and producing new ones for the case of percolation. Results confirm recent findings in Gori and Trombettoni [J. Stat. Mech: Theory Exp. (2020) 063210] at the upper critical dimension, particularly in the specific case of the four-dimensional Ising model with fixed boundary conditions.
Article
Physics, Multidisciplinary
Matthias Christandl, Roberto Ferrara, Karol Horodecki
Summary: Quantum key distribution (QKD) and device-independent quantum key distribution (DIQKD) are methods of distributing keys using quantum particles, with DIQKD having a stronger security concept than QKD. Studies show that the achievable rate of DIQKD may exceed the upper bounds possible for QKD in specific quantum states or channels, and in some cases, the QKD rate is significant while the DIQKD rate is negligible.
PHYSICAL REVIEW LETTERS
(2021)
Article
Statistics & Probability
Tom Hutchcroft
ANNALES DE L INSTITUT HENRI POINCARE-PROBABILITES ET STATISTIQUES
(2020)
Article
Mathematics
Tom Hutchcroft, Gabor Pete
INVENTIONES MATHEMATICAE
(2020)
Article
Statistics & Probability
Tom Hutchcroft
ANNALS OF PROBABILITY
(2020)
Article
Statistics & Probability
Ewain Gwynne, Tom Hutchcroft
PROBABILITY THEORY AND RELATED FIELDS
(2020)
Article
Mathematics, Applied
Nicolas Curien, Tom Hutchcroft, Asaf Nachmias
JOURNAL OF THE EUROPEAN MATHEMATICAL SOCIETY
(2020)
Article
Statistics & Probability
Tom Hutchcroft
Summary: This study proves that under certain conditions, there is no infinite cluster at the critical parameter in long-range Bernoulli percolation on Z(d), while also providing a new power-law upper bound. As part of the proof, a universal inequality is established, leading to a new rigorous hyperscaling inequality involving the cluster-volume exponent and two-point function exponent.
PROBABILITY THEORY AND RELATED FIELDS
(2021)
Article
Multidisciplinary Sciences
Noah Halberstam, Tom Hutchcroft
Summary: This article investigates the universality of critical behaviors beyond the Euclidean setting, using Bernoulli bond percolation and lattice trees as case studies. The authors present strong numerical evidence that the critical exponents governing these models on graphs with polynomial volume growth depend only on the volume-growth dimension of the graph.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Article
Physics, Mathematical
Tom Hutchcroft
Summary: This study introduces a new method to derive the critical behavior of mean-field percolation from the triangle condition, which performs quantitatively better when the triangle diagram is large. Compared to previous methods, this approach continues to yield reasonable bounds even when the triangle diagram is unbounded. The research also demonstrates that if the triangle diagram diverges in a polylogarithmic manner as p approaches p(c), then mean-field critical behavior will be maintained within a polylogarithmic factor.
JOURNAL OF STATISTICAL PHYSICS
(2022)
Article
Computer Science, Theory & Methods
Tom Hutchcroft, Alexander Kent, Petar Nizic-Nikolac
Summary: This article introduces the Bunkbed graph of G x K-2 product graph and presents Kasteleyn's Bunkbed conjecture. The study reveals that the conjecture holds in the limit case under certain conditions.
COMBINATORICS PROBABILITY & COMPUTING
(2022)
Article
Physics, Mathematical
Tom Hutchcroft, Perla Sousi
Summary: We calculate the precise logarithmic corrections to mean-field scaling for the uniform spanning tree of the four-dimensional hypercubic lattice Z(4). We focus on the distribution of the past of the origin, and prove the probabilities for the past to contain paths of length n, at least n vertices, and reach the boundary of the box [-n, n](4). Our results also imply non-trivial polylogarithmic corrections to mean-field scaling in four dimensions for the Abelian sandpile model, although the precise order of these corrections is still unknown.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2023)
Article
Physics, Mathematical
Tom Hutchcroft
Summary: This article rigorously proves that the ferromagnetic Ising model on any nonamenable Cayley graph undergoes a continuous phase transition and has a unique Gibbs measure at the critical temperature. The proof is quantitative and provides power-law bounds on the magnetization. Additionally, the article shows that the magnetization is a locally Holder-continuous function of the inverse temperature and external field. As a second application, it is also proven that the free energy of Bernoulli percolation is twice differentiable at pc on any transitive nonamenable graph.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2023)
Article
Statistics & Probability
Tom Hutchcroft
Summary: In this study, we investigate the growth and isoperimetry of infinite clusters in slightly supercritical Bernoulli bond percolation on transitive nonamenable graphs under the L-2 boundedness condition. Surprisingly, we find that the volume growth of infinite clusters is always purely exponential in a certain range, even when the ambient graph has unbounded corrections to exponential growth. We also establish precise estimates and prove a percolation analogue theorem.
PROBABILITY THEORY AND RELATED FIELDS
(2023)
Article
Physics, Mathematical
Tom Hutchcroft
Summary: We rigorously prove that the ferromagnetic Ising model on any nonamenable Cayley graph undergoes a continuous phase transition, with a unique Gibbs measure at the critical temperature. The proof is quantitative and also provides power-law bounds on the magnetization near criticality. Additionally, we show that the magnetization is a locally Holder-continuous function of the inverse temperature and external field.
COMMUNICATIONS IN MATHEMATICAL PHYSICS
(2023)
Article
Statistics & Probability
Omer Angel, Tom Hutchcroft, Antal Jarai
Summary: This study examines the tail of the total number of particles that visit a vertex in a critical branching random walk on Z(d), where d is greater than or equal to 1. The results indicate that the findings hold true under suitable conditions on the offspring distribution, particularly when the distribution has an exponential moment.
PROBABILITY THEORY AND RELATED FIELDS
(2021)