Abstract
We study the directed polymer model for general graphs (beyond Zd) and random walks. We provide sufficient conditions for the existence or non-existence of a weak disorder phase, of an L2 region, and of very strong disorder, in terms of properties of the graph and of the random walk. We study in some detail (biased) random walk on various trees including the Galton–Watson trees, and provide a range of other examples that illustrate counter-examples to intuitive extensions of the Zd/SRW result.
| Original language | English |
|---|---|
| Pages (from-to) | 395-432 |
| Number of pages | 38 |
| Journal | Communications in Mathematical Physics |
| Volume | 386 |
| Issue number | 1 |
| Early online date | 1 Mar 2021 |
| DOIs | |
| State | Published - Aug 2021 |
All Science Journal Classification (ASJC) codes
- Statistical and Nonlinear Physics
- Mathematical Physics