Thursday, June 1 |
07:00 - 08:45 |
Breakfast ↓ Breakfast is served daily between 7 and 9am in the Vistas Dining Room, the top floor of the Sally Borden Building. (Vistas Dining Room) |
09:00 - 09:35 |
Pablo Ferrari: Hidden temperature in the KMP model ↓ In the KMP model each vertex i of a finite graph has an energy Xi, a nonnegative real value. When a Poisson clock rings at the edge ij, the current energies Xi and Xj are substituted by U(Xi+Xj) and (1−U)(Xi+Xj), respectively, where U is uniform in (0,1). If j is a boundary vertex, it is updated to an exponential variable with mean Tj, a temperature parameter. We show that the invariant measure is the law of Z, a vector with coordinates Zi=TiXi, where Xi are iid exponential(1), the law of T is the invariant measure for an opinion model with the same boundary conditions, and X and T are independent. The result confirms a conjecture based on the large deviations of KMP. Applications include hydrodynamic limits. The opinion differences associated to edges behave as a neural spiking process. Work in progress with Anna de Masi and Davide Gabrielli. (TCPL 201) |
09:40 - 10:15 |
Eric Cator: The PNG model on the circle ↓ We will introduce a periodic version of the PNG model and show that it is a solvable model. We can give stationary measures for the model at a fixed time and for the distribution of the space-time paths, which in this model are up-down paths that form rings. This is joint work with Pablo Ferrari (UBA). (TCPL 201) |
10:15 - 10:45 |
Coffee Break (TCPL Foyer) |
10:45 - 11:20 |
Marton Balazs: Queues, stationarity, and stabilisation of last passage percolation ↓ I will explain how the two-parameter stationary last passage percolation picture and some planarity tricks can be used to establish stabilisation of the point-to-point geodesic tree to the semi-infinite one. The repertoire includes Poisson processes and loaded queues.
Joint work with Ofer Busani and Timo Seppäläinen. (TCPL 201) |
11:25 - 12:00 |
Erik Bates: The Busemann process for (1+1)-dimensional polymers ↓ Busemann functions have been decidedly instrumental in advancing our understanding of FPP and LPP, both in general and exactly solvable cases. The Busemann theory is less developed, however, for their positive-temperature counterparts: directed polymers. This talk will highlight some recent progress on that front, namely in understanding the Busemann process simultaneously across all directions. We will see some reassuring similarities with the zero-temperature setting, but also some intriguing differences. The inverse-gamma model will be our star witness. (TCPL 201) |
12:00 - 13:30 |
Lunch ↓ Lunch is served daily between 11:30am and 1:30pm in the Vistas Dining Room, the top floor of the Sally Borden Building. (Vistas Dining Room) |
14:30 - 15:05 |
Philippe Sosoe: Tail bounds for KPZ models ↓ I will present a general methodology, based on a formula of Rains and Emrah-Janjigian-Seppalainen, to obtain scaling and tail bounds in several KPZ models, including some that are not known or expected to be integrable. (TCPL 201) |
15:10 - 15:45 |
Xiao Shen: Temporal correlation in the inverse-gamma polymer ↓ The temporal correlations of randomly growing interfaces within the KPZ universality class have gained significant interest in recent research. In this talk, we address the time correlation problem for the inverse-gamma polymer in (1+1) dimensions, examining both droplet and diffusive growth initial conditions. We establish upper and lower bounds, up to constant factors, for the correlation between the free energy of two polymers with endpoints in close proximity or far apart. Our arguments rely on the understanding of stationary polymers, coupling, random walk comparison, and the recently established one-point moderate deviation estimates derived through stationary polymer techniques. Therefore, our methods are only weakly dependent on the integrable nature of the model. (Based on joint work with Timo Seppäläinen and Riddhipratim Basu.) (TCPL 201) |
15:45 - 16:15 |
Coffee Break (TCPL Foyer) |
16:15 - 16:50 |
Elnur Emrah: Classifying boundary fluctuations of uniformly random Gelfand-Tsetlin patterns ↓ A Gelfand-Tsetlin (GT) pattern of depth n is an interlacing array of n(n+1)/2 real entries distributed over n levels such that level k=0,1,…,n−1 contains exactly n−k entries. Let Gn denote a GT pattern with a fixed level zero sequence an and with the remaining entries (particles) distributed uniformly at random. By a result of Y. Baryshnikov, Gn is equal in distribution to the eigenvalue minor process of a unitarily invariant random Hermitian matrix with eigenvalue sequence an. In this talk, our interest is in the limiting boundary fluctuations of Gn at the level of finite-dimensional distributions of first particles. We present a classification theorem that identifies five fluctuation regimes in terms of the level zero data (an) and describes the corresponding limit processes. This result is from a forthcoming joint work with Kurt Johansson. (TCPL 201) |
16:55 - 17:30 |
Tatyana Shcherbina: Finite-rank complex perturbation of Hermitian random matrices ↓ The complex eigenvalues z1,…,zN of non-Hermitian random matrices H=H0+iΓ (H0 is a Hermitian random matrix and Γ is a deterministic symmetric matrix of the finite rank) have attracted much research interest due to their relevance to several branches of theoretical physics, and in particular to the study of scattering chaotic systems. Taken H0 from the few classical ensembles of random matrices, we discuss a certain form of universality appearing in the distribution of ℑz1,…,ℑzN ({ℑzi} physically correspond to the so-called ``resonance widths") (TCPL 201) |
17:30 - 19:30 |
Dinner ↓ A buffet dinner is served daily between 5:30pm and 7:30pm in Vistas Dining Room, top floor of the Sally Borden Building. (Vistas Dining Room) |