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Continuity of the time constant in a continuous model of first passage percolation 第一通道渗流连续模型中时间常数的连续性
IF 1.5 Q2 PHYSICS, MATHEMATICAL Pub Date : 2020-11-27 DOI: 10.1214/21-aihp1222
J.-B. Gouéré, Marie Théret
For a given dimension d $ge$ 2 and a finite measure $nu$ on (0, +$infty$), we consider $xi$ a Poisson point process on R d x (0, +$infty$) with intensity measure dc $otimes$ $nu$ where dc denotes the Lebesgue measure on R d. We consider the Boolean model $Sigma$ = $cup$ (c,r)$in$$xi$ B(c, r) where B(c, r) denotes the open ball centered at c with radius r. For every x, y $in$ R d we define T (x, y) as the minimum time needed to travel from x to y by a traveler that walks at speed 1 outside $Sigma$ and at infinite speed inside $Sigma$. By a standard application of Kingman sub-additive theorem, one easily shows that T (0, x) behaves like $mu$ x when x goes to infinity, where $mu$ is a constant named the time constant in classical first passage percolation. In this paper we investigate the regularity of $mu$ as a function of the measure $nu$ associated with the underlying Boolean model.
对于给定的维数d $ge$ 2和一个有限的测量 $nu$ 在(0,+$infty$),我们认为 $xi$ 在rdx(0, +)上的泊松点过程$infty$),强度测量直流 $otimes$ $nu$ 其中dc表示R d上的勒贝格测度。我们考虑布尔模型 $Sigma$ = $cup$ (c,r)$in$$xi$ B(c, r)其中B(c, r)表示以c为圆心半径为r的开放球 $in$ 我们定义T (x, y)为一个在外面以速度1行走的旅行者从x到y所需要的最小时间 $Sigma$ 在里面以无限的速度 $Sigma$. 通过对Kingman次加性定理的标准应用,可以很容易地证明T (0, x)表现为 $mu$ 当X→∞时 $mu$ 是经典第一通道渗流中的一个常数,称为时间常数。的正则性 $mu$ 作为度量的函数 $nu$ 与底层布尔模型相关联。
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引用次数: 0
Transience and recurrence of sets for branching random walk via non-standard stochastic orders 非标准随机阶分支随机游走集的暂态和递归性
IF 1.5 Q2 PHYSICS, MATHEMATICAL Pub Date : 2020-11-12 DOI: 10.1214/21-aihp1186
Tom Hutchcroft
We study how the recurrence and transience of space-time sets for a branching random walk on a graph depends on the offspring distribution. Here, we say that a space-time set $A$ is recurrent if it is visited infinitely often almost surely on the event that the branching random walk survives forever, and say that $A$ is transient if it is visited at most finitely often almost surely. We prove that if $mu$ and $nu$ are supercritical offspring distributions with means $bar mu < bar nu$ then every space-time set that is recurrent with respect to the offspring distribution $mu$ is also recurrent with respect to the offspring distribution $nu$ and similarly that every space-time set that is transient with respect to the offspring distribution $nu$ is also transient with respect to the offspring distribution $mu$. To prove this, we introduce a new order on probability measures that we call the germ order and prove more generally that the same result holds whenever $mu$ is smaller than $nu$ in the germ order. Our work is inspired by the work of Johnson and Junge (AIHP 2018), who used related stochastic orders to study the frog model.
研究了图上分支随机漫步的时空集的递归性和暂态性与子代分布的关系。在这里,我们说一个时空集$A$是循环的,如果它在分支随机漫步永远存在的情况下几乎可以肯定地被无限次访问,如果它几乎可以肯定地被无限次访问,那么$A$是短暂的。我们证明,如果$mu$和$nu$是均值为$bar mu < bar nu$的超临界后代分布,那么每一个关于后代分布循环的时空集$mu$对于后代分布也是循环的$nu$同样,每一个关于后代分布瞬态的时空集$nu$对于后代分布也是瞬态的$mu$。为了证明这一点,我们在概率测度上引入了一个新的阶数,我们称之为胚芽阶数,并更一般地证明,当胚芽阶中$mu$小于$nu$时,同样的结果成立。我们的工作灵感来自Johnson和Junge (AIHP 2018)的工作,他们使用相关的随机顺序来研究青蛙模型。
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引用次数: 4
Diffusive limits of two-parameter ordered Chinese Restaurant Process up-down chains 双参数有序中餐厅过程的扩散极限
IF 1.5 Q2 PHYSICS, MATHEMATICAL Pub Date : 2020-11-12 DOI: 10.1214/22-aihp1256
Kelvin Rivera-Lopez, Douglas Rizzolo
We construct a two-parameter family of diffusions on the set of open subsets of $(0,1)$ that arise as diffusive limits of two-parameter ordered Chinese Restaurant Process up-down chains.
我们在$(0,1)$的开子集集合上构造了作为双参数有序中餐馆过程上下链的扩散极限的双参数扩散族。
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引用次数: 8
A Kac model with exclusion 排除的Kac模型
IF 1.5 Q2 PHYSICS, MATHEMATICAL Pub Date : 2020-11-04 DOI: 10.1214/22-aihp1276
E. Carlen, B. Wennberg
We consider a one dimension Kac model with conservation of energy and an exclusion rule: Fix a number of particles $n$, and an energy $E>0$. Let each of the particles have an energy $x_j geq 0$, with $sum_{j=1}^n x_j = E$. For some $epsilon$, the allowed configurations $(x_1,dots,x_n)$ are those that satisfy $|x_i - x_j| geq epsilon$ for all $ineq j$. At each step of the process, a pair $(i,j)$ of particles is selected uniformly at random, and then they "collide", and there is a repartition of their total energy $x_i + x_j$ between them producing new energies $x^*_i$ and $x^*_j$ with $x^*_i + x^*_j = x_i + x_j$, but with the restriction that exclusion rule is still observed for the new pair of energies. This process bears some resemblance to Kac models for Fermions in which the exclusion represents the effects of the Pauli exclusion principle. However, the "non-quantized" exclusion rule here, with only a lower bound on the gaps, introduces interesting novel features, and a strong notion of Kac's chaos is required to derive an evolution equation for the evolution of rescaled empirical measures for the process, as we show here.
我们考虑具有能量守恒和不相容规则的一维Kac模型:固定粒子数量$n$和能量$E>0$。让每个粒子都有一个能量$x_j geq 0$和$sum_{j=1}^n x_j = E$。对于某些$epsilon$,允许的配置$(x_1,dots,x_n)$是所有$ineq j$满足$|x_i - x_j| geq epsilon$的配置。在每一步过程中,均匀随机地选择一对$(i,j)$粒子,然后它们“碰撞”,它们之间的总能量重新分配$x_i + x_j$,产生新的能量$x^*_i$和$x^*_j$与$x^*_i + x^*_j = x_i + x_j$,但有一个限制,即对新的能量对仍然观察到不相容规则。这个过程与卡茨费米子模型有些相似,在卡茨费米子模型中,不相容表示泡利不相容原理的影响。然而,这里的“非量子化”不排除规则,只有间隙的下界,引入了有趣的新特征,并且需要一个强大的Kac混沌概念来推导该过程的重标经验度量的演化方程,如我们在这里所示。
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引用次数: 0
Constrained-degree percolation in random environment 随机环境下的约束度渗流
IF 1.5 Q2 PHYSICS, MATHEMATICAL Pub Date : 2020-11-03 DOI: 10.1214/21-aihp1231
R. Sanchis, Diogo C. dos Santos, Roger W. C. Silva
We consider the Constrained-degree percolation model with random constraints on the square lattice and prove a non-trivial phase transition. In this model, each vertex has an independently distributed random constraint $jin {0,1,2,3}$ with probability $rho_j$. Each edge $e$ tries to open at a random uniform time $U_e$, independently of all other edges. It succeeds if at time $U_e$ both its end-vertices have degrees strictly smaller than their respectively attached constraints. We show that this model undergoes a non-trivial phase transition when $rho_3$ is sufficiently large. The proof consists of a decoupling inequality, the continuity of the probability for local events, together with a coarse-graining argument.
考虑具有随机约束的约束度渗流模型,证明了其非平凡相变。在该模型中,每个顶点都有一个独立分布的随机约束$j In {0,1,2,3}$,概率$rho_j$。每条边$e$尝试在一个随机的统一时间$U_e$打开,独立于所有其他边。如果在时间$U_e$,它的两个端点的度数都严格小于它们各自附加的约束,它就会成功。我们证明,当$rho_3$足够大时,该模型经历了一个非平凡的相变。该证明由解耦不等式、局部事件概率的连续性以及粗粒度论证组成。
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引用次数: 2
The dimer and Ising models on Klein bottles 克莱因瓶上的二聚体和伊辛模型
IF 1.5 Q2 PHYSICS, MATHEMATICAL Pub Date : 2020-10-21 DOI: 10.4171/aihpd/166
David Cimasoni
We study the dimer and Ising models on a planar weighted graph with periodic-antiperiodic boundary conditions, i.e. a graph $Gamma$ in the Klein bottle $K$. Let $Gamma_{mn}$ denote the graph obtained by pasting $m$ rows and $n$ columns of copies of $Gamma$, which embeds in $K$ for $n$ odd and in the torus $mathbb{T}^2$ for $n$ even. We compute the dimer partition function $Z_{mn}$ of $Gamma_{mn}$ for $n$ odd, in terms of the well-known characteristic polynomial $P$ of $Gamma_{12}subsetmathbb{T}^2$ together with a new characteristic polynomial $R$ of $Gammasubset K$. Using this result together with work of Kenyon, Sun and Wilson [arXiv:1310.2603], we show that in the bipartite case, this partition function has the asymptotic expansion $log Z_{mn}=mn f_0/2 +mathrm{fsc}+o(1)$, where $f_0$ is the bulk free energy for $Gamma_{12}subsetmathbb{T}^2$ and $mathrm{fsc}$ an explicit finite-size correction term. The remarkable feature of this later term is its universality: it does not depend on the graph $Gamma$, but only on the zeros of $P$ on the unit torus and on an explicit (purely imaginary) shape parameter. A similar expansion is also obtained in the non-bipartite case, assuming a conjectural condition on the zeros of $P$. We then show that this asymptotic expansion holds for the Ising partition function as well, with $mathrm{fsc}$ taking a particularly simple form: it vanishes in the subcritical regime, is equal to $log(2)$ in the supercritical regime, and to an explicit function of the shape parameter at criticality. These results are in full agreement with the conformal field theory predictions of Blote, Cardy and Nightingale.
我们研究了具有周期性-反周期边界条件的平面加权图上的二聚体和Ising模型,即克莱因瓶$K$中的图$Gamma$。设$Gamma_{mn}$表示通过粘贴$Gamma$副本的$m$行和$n$列获得的图形,对于$n$奇数嵌入到$K$中,对于$n$偶数嵌入到圆环$mathbb{T}^2$中。我们根据众所周知的特征多项式$P$ ($Gamma_{12}subsetmathbb{T}^2$)和一个新的特征多项式$R$ ($Gammasubset K$)来计算$n$奇数的二聚体配分函数$Z_{mn}$ ($Gamma_{mn}$)。利用这一结果和Kenyon, Sun和Wilson [arXiv:1310.2603]的工作,我们证明了在二部情况下,该配分函数具有渐近展开$log Z_{mn}=mn f_0/2 +mathrm{fsc}+o(1)$,其中$f_0$是$Gamma_{12}subsetmathbb{T}^2$的总体自由能,$mathrm{fsc}$是一个显式有限大小的修正项。后一项的显著特征是它的通用性:它不依赖于图形$Gamma$,而只依赖于单位环面上$P$的零点和一个显式的(纯虚的)形状参数。在非二部情况下也得到了类似的展开式,在$P$的零点上假设了一个猜想条件。然后,我们证明这种渐近展开也适用于伊辛配分函数,其中$mathrm{fsc}$的形式特别简单:它在亚临界状态下消失,在超临界状态下等于$log(2)$,在临界状态下等于形状参数的显式函数。这些结果与Blote、Cardy和Nightingale的共形场论预测完全一致。
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引用次数: 2
Large fluctuations and transport properties of the Lévy–Lorentz gas l<s:1> -洛伦兹气体的大波动和输运性质
IF 1.5 Q2 PHYSICS, MATHEMATICAL Pub Date : 2020-10-18 DOI: 10.1214/22-AIHP1283
M. Zamparo
The Levy-Lorentz gas describes the motion of a particle on the real line in the presence of a random array of scattering points, whose distances between neighboring points are heavy-tailed i.i.d. random variables with finite mean. The motion is a continuous-time, constant-speed interpolation of the simple symmetric random walk on the marked points. In this paper we study the large fluctuations of the continuous-time process and the resulting transport properties of the model, both annealed and quenched, confirming and extending previous work by physicists that pertain to the annealed framework. Specifically, focusing on the particle displacement, and under the assumption that the tail distribution of the interdistances between scatterers is regularly varying at infinity, we prove a uniform large deviation principle for the annealed fluctuations and present the asymptotics of annealed moments, demonstrating annealed superdiffusion. Then, we provide an upper large deviation estimate for the quenched fluctuations and the asymptotics of quenched moments, showing that, unexpectedly, the asymptotically stable diffusive regime conditional on a typical arrangement of the scatterers is normal diffusion. Although the Levy-Lorentz gas seems to be accepted as a model for anomalous diffusion, our findings lead to the conclusion that superdiffusion is a metastable behavior, which develops into normal diffusion on long timescales.
列维-洛伦兹气体描述了粒子在存在随机散射点阵列的实线上的运动,其邻近点之间的距离是具有有限平均值的重尾i.i.d随机变量。该运动是在标记点上的简单对称随机游走的连续时间、等速插值。在本文中,我们研究了连续时间过程的大波动和由此产生的模型的输运性质,包括退火和淬火,证实和扩展了物理学家先前关于退火框架的工作。具体而言,我们以粒子位移为中心,在假设散射体间距离的尾部分布在无穷远处有规则变化的情况下,证明了退火波动的均匀大偏差原理,并给出了退火矩的渐近性,证明了退火超扩散。然后,我们给出了淬灭波动和淬灭矩渐近性的上大偏差估计,结果表明,在典型的散射体排列条件下,渐近稳定扩散状态是正态扩散。虽然利维-洛伦兹气体似乎被接受为异常扩散的模型,但我们的研究结果得出的结论是,超扩散是一种亚稳态行为,在长时间尺度上发展为正常扩散。
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引用次数: 4
Free energy upper bound for mean-field vector spin glasses 平均场矢量自旋玻璃的自由能上界
IF 1.5 Q2 PHYSICS, MATHEMATICAL Pub Date : 2020-10-18 DOI: 10.1214/22-aihp1292
J. Mourrat
We consider vector spin glasses whose energy function is a Gaussian random field with covariance given in terms of the matrix of scalar products. For essentially any model in this class, we give an upper bound for the limit free energy, which is expected to be sharp. The bound is expressed in terms of an infinite-dimensional Hamilton-Jacobi equation.
考虑能量函数为高斯随机场的矢量自旋玻璃,其协方差以标量积矩阵的形式给出。对于本课的任何模型,我们都给出了自由能的上限,这个上限很明显。边界是用一个无限维的Hamilton-Jacobi方程来表示的。
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引用次数: 23
Stationary states of the one-dimensional facilitated asymmetric exclusion process 一维的定态促进了不对称排斥过程
IF 1.5 Q2 PHYSICS, MATHEMATICAL Pub Date : 2020-10-14 DOI: 10.1214/22-AIHP1264
Arvind Ayyer, S. Goldstein, J. Lebowitz, E. Speer
We describe the translation invariant stationary states (TIS) of the one-dimensional facilitated asymmetric exclusion process in continuous time, in which a particle at site $iinmathbb{Z}$ jumps to site $i+1$ (respectively $i-1$) with rate $p$ (resp. $1-p$), provided that site $i-1$ (resp. $i+1$) is occupied and site $i+1$ (resp. $i-1$) is empty. All TIS states with density $rhole1/2$ are supported on trapped configurations in which no two adjacent sites are occupied; we prove that if in this case the initial state is Bernoulli then the final state is independent of $p$. This independence also holds for the system on a finite ring. For $rho>1/2$ there is only one TIS. It is the infinite volume limit of the probability distribution that gives uniform weight to all configurations in which no two holes are adjacent, and is isomorphic to the Gibbs measure for hard core particles with nearest neighbor exclusion.
我们描述了连续时间一维易化不对称不相容过程的平移不变平稳状态(TIS),其中位置$iinmathbb{Z}$的粒子以速度$p$(分别为$i-1$)跃迁到位置$i+1$(分别为)。$1-p$),前提是网站$i-1$(参见:($i+1$)已被占用,而网站$i+1$ (resp。$i-1$)是空的。密度为$rhole1/2$的所有TIS状态都支持在没有两个相邻站点被占用的捕获构型上;我们证明如果在这种情况下初始态是伯努利态那么最终态与$p$无关。这种独立性也适用于有限环上的系统。对于$rho>1/2$,只有一个TIS。它是概率分布的无限体积极限,在没有两个孔相邻的所有构型中给予均匀的权重,并且与具有最近邻不相容的硬核粒子的吉布斯测量同构。
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引用次数: 6
Higher Airy structures and topological recursion for singular spectral curves 奇异谱曲线的高艾里结构与拓扑递推
IF 1.5 Q2 PHYSICS, MATHEMATICAL Pub Date : 2020-10-07 DOI: 10.4171/aihpd/168
G. Borot, Reinier Kramer, Yannik Schuler
We give elements towards the classification of quantum Airy structures based on the $W(mathfrak{gl}_r)$-algebras at self-dual level based on twisted modules of the Heisenberg VOA of $mathfrak{gl}_r$ for twists by arbitrary elements of the Weyl group $mathfrak{S}_{r}$. In particular, we construct a large class of such quantum Airy structures. We show that the system of linear ODEs forming the quantum Airy structure and determining uniquely its partition function is equivalent to a topological recursion a la Chekhov--Eynard--Orantin on singular spectral curves. In particular, our work extends the definition of the Bouchard--Eynard topological recursion (valid for smooth curves) to a large class of singular curves, and indicates impossibilities to extend naively the definition to other types of singularities. We also discuss relations to intersection theory on moduli spaces of curves and give precise conjectures for application in open $r$-spin intersection theory.
基于Weyl群$mathfrak{S}_{r}$的扭曲模的Heisenberg VOA $mathfrak{gl}_r$的扭曲模,给出了量子Airy结构在自对偶水平上的$W(mathfrak{gl}_r)$-代数的分类元素。特别地,我们构造了一大类这样的量子艾里结构。我们证明了形成量子Airy结构并唯一确定其配分函数的线性ode系统等价于奇异谱曲线上Chekhov- Eynard- Orantin的拓扑递归。特别地,我们的工作将Bouchard- Eynard拓扑递归的定义(对光滑曲线有效)扩展到一类大的奇异曲线,并指出不可能将该定义简单地扩展到其他类型的奇异点。讨论了曲线模空间上与交理论的关系,并给出了应用于开r自旋交理论的精确猜想。
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引用次数: 10
期刊
Annales de l Institut Henri Poincare D
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