Asymptotics of noncolliding q-exchangeable random walks
Asymptotics of noncolliding q-exchangeable random walks
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非碰撞 q-可交换随机游走的渐近
DOI:
10.1088/1751-8121/acedda
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Tikhonov, Mikhail
中科院分区:
文献类型:
--
作者:
Petrov, Leonid;Tikhonov, Mikhail
We consider a process of noncolliding q-exchangeable random walks on Z making steps 0 (“straight”) and− 1 (“down”). A single random walk is called q-exchangeable if under an elementary transposition of the neighboring steps (down, straight)→(straight, down) the probability of the trajectory is multiplied by a parameter q∈(0, 1). Our process of m noncolliding q-exchangeable random walks is obtained from the independent q-exchangeable walks via the Doob’s h-transform for a nonnegative eigenfunction h (expressed via the q-Vandermonde product) with the eigenvalue less than 1. The system of m walks evolves in the presence of an absorbing wall at 0. The repulsion mechanism is the q-analogue of the Coulomb repulsion of random matrix eigenvalues undergoing Dyson Brownian motion. However, in our model, the particles are confined to the positive half-line and do not spread as Brownian motions or simple random walks.We show that the trajectory of the noncolliding q-exchangeable walks started from an arbitrary initial configuration forms a determinantal point process, and express its kernel in a double contour integral form. This kernel is obtained as a limit from the correlation kernel of q-distributed random lozenge tilings of sawtooth polygons. In the limit as m→∞, q= e− γ/m with γ> 0 fixed, and under a suitable scaling of the initial data, we obtain a limit shape of our noncolliding walks and also show that their local statistics are governed by the incomplete beta kernel. The latter is a distinguished translation invariant ergodic extension of the two-dimensional discrete sine kernel.
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DOI:
10.1090/pcms/016/04
发表时间:
2009-10
期刊:
arXiv: Probability
影响因子:
--
作者:
R. Kenyon
通讯作者:
R. Kenyon
DOI:
10.1214/18-aop1315
发表时间:
2019
期刊:
The Annals of Probability
影响因子:
--
作者:
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通讯作者:
Petrov, Leonid
DOI:
10.1214/12-aop823
发表时间:
2012
期刊:
arXiv: Probability
影响因子:
--
作者:
L. Petrov
通讯作者:
L. Petrov
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
Ljuben S. Mutafchiev
通讯作者:
Ljuben S. Mutafchiev
DOI:
--
发表时间:
2022
期刊:
影响因子:
--
作者:
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通讯作者:
Jiaoyang Huang