Geodesic--argmax rigidity conjecture for the directed landscape

Let L\mathcal L be the directed landscape, let π(τT)\pi^*(\tau T) denote the spatial location at time τT\tau T of the relevant geodesic, and condition on L(0,0;0,T)=L\mathcal L(0,0;0,T)=L. For each τ(0,1)\tau\in(0,1), define the rescaled spatial argument of the directed-landscape argmax by

argmaxxRL(0,0;xT3/42L1/4,τT).\operatornamewithlimits{argmax}_{x\in\mathbb R}\mathcal L\left(0,0;\frac{xT^{3/4}}{2L^{1/4}},\tau T\right).

Geodesic--argmax rigidity conjecture. For every τ(0,1)\tau\in(0,1) and T>0T>0, conditionally given L(0,0;0,T)=L\mathcal L(0,0;0,T)=L, as LL\to\infty,

2L1/4π(τT)T3/4argmaxxRL(0,0;xT3/42L1/4,τT)0\frac{2L^{1/4}\pi^*(\tau T)}{T^{3/4}}-\operatornamewithlimits{argmax}_{x\in\mathbb R}\mathcal L\left(0,0;\frac{xT^{3/4}}{2L^{1/4}},\tau T\right)\to 0

in probability. The conjecture asserts that the geodesic location and the argmax process become asymptotically identical under the high-height conditioning. It is motivated by the more involved definition of the geodesic and by the expected uniqueness of the conditional argmax process.

Sources & referencesView supporting material

Primary source

Zhipeng Liu and Yizao Wang, “A conditional scaling limit of the KPZ fixed point with height tending to infinity at one location”, arXiv:2208.12215 (2022).

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