Directed landscape convergence for the half-space log-gamma polymer $N^{2/3+\delta}$ away from the boundary
Abstract
We prove that the free energy of the half-space log-gamma polymer away from the boundary in the non-attractive regime converges to the directed landscape. Based on the convergence of the full-space log-gamma free energy to the directed landscape, we couple the full-space and the half-space model and prove that the dominant contributions to free energy in both cases come from paths that remain confined to a transversal window of order . The result follows from three main inputs: a deterministic leading-order gap between paths that deviate from the transversal window on the scale and those within the typical scale; uniform exponential upper-tail bounds for half-space free energies with general slope; and existing full-space estimates on constrained and exiting free energies.
Keywords
Cite
@article{arxiv.2602.23549,
title = {Directed landscape convergence for the half-space log-gamma polymer $N^{2/3+\delta}$ away from the boundary},
author = {Xinyi Zhang},
journal= {arXiv preprint arXiv:2602.23549},
year = {2026}
}
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