Zobrazeno 1 - 10
of 1 313
pro vyhledávání: '"A, Krapivsky"'
Self-reinforcing cascades: A spreading model for beliefs or products of varying intensity or quality
Autor:
Hébert-Dufresne, Laurent, Lovato, Juniper, Burgio, Giulio, Gleeson, James P., Redner, S., Krapivsky, P. L.
Models of how things spread often assume that transmission mechanisms are fixed over time. However, social contagions--the spread of ideas, beliefs, innovations--can lose or gain in momentum as they spread: ideas can get reinforced, beliefs strengthe
Externí odkaz:
http://arxiv.org/abs/2411.00714
Autor:
Viot, Pascal, Krapivsky, P. L.
In random sequential covering, identical objects are deposited randomly, irreversibly, and sequentially; only attempts that increase coverage are accepted. The process continues indefinitely on an infinite substrate, and we analyze the dynamics of ra
Externí odkaz:
http://arxiv.org/abs/2410.12373
We study large fluctuations of the current in a Dyson gas, a 1D system of particles interacting through a logarithmic potential and subjected to random noise. We adapt the macroscopic fluctuation theory to the Dyson gas and derive two coupled partial
Externí odkaz:
http://arxiv.org/abs/2409.06881
Autor:
Krapivsky, P. L., Redner, S.
We introduce an aggregation process based on \emph{templating}, where a specified number of constituent clusters must assemble on a larger aggregate, which serves as a scaffold, for a reaction to occur. A simple example is a dimer scaffold, upon whic
Externí odkaz:
http://arxiv.org/abs/2408.02910
We investigate the overdamped dynamics of a `passive' particle driven by nonreciprocal interaction with a `driver' Brownian particle. When the interaction between them is short-ranged, the long-time behavior of the driven particle is remarkably unive
Externí odkaz:
http://arxiv.org/abs/2407.16436
Autor:
Krapivsky, P. L., Redner, S.
We introduce an aggregation process that begins with equal concentrations of positively and negatively `charged' monomers. Oppositely charged monomers merge to form neutral dimers. These dimers are the seeds for subsequent aggregation events in which
Externí odkaz:
http://arxiv.org/abs/2406.05263
Autor:
Krapivsky, P. L., Redner, S.
We introduce an autocatalytic aggregation model in which the rate at which two clusters merge to form a cluster is controlled by the presence of a third "catalytic" cluster whose mass must equal to the mass of one of the reaction partners. The cataly
Externí odkaz:
http://arxiv.org/abs/2404.17026
Autor:
Krapivsky, P. L., Matveev, Sergey A.
We investigate irreversible aggregation processes driven by a source of small mass clusters. In the spatially homogeneous situation, a well-mixed system is consists of clusters of various masses whose concentrations evolve according to an infinite sy
Externí odkaz:
http://arxiv.org/abs/2404.01032
Autor:
Krapivsky, P. L.
Publikováno v:
Phys. Rev. A 110, 013328 (2024)
We consider an impurity in a sea of zero-temperature fermions uniformly distributed throughout the space. The impurity scatters on fermions. On average, the momentum of impurity decreases with time as $t^{-1/(d+1)}$ in $d$ dimensions, and the momentu
Externí odkaz:
http://arxiv.org/abs/2403.05057
Autor:
Krapivsky, P. L.
Publikováno v:
Phys. Rev. E 109, 064304 (2024)
We study the evolution of graphs densifying by adding edges: Two vertices are chosen randomly, and an edge is (i) established if each vertex belongs to a tree; (ii) established with probability $p$ if only one vertex belongs to a tree; (iii) an attem
Externí odkaz:
http://arxiv.org/abs/2312.02952