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Rigidity Hierarchy in Random Point Fields: Random Polynomials and Determinantal Processes

Ghosh, S and Krishnapur, M (2021) Rigidity Hierarchy in Random Point Fields: Random Polynomials and Determinantal Processes. In: Communications in Mathematical Physics .

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Official URL: https://doi.org/10.1007/s00220-021-04254-0


In certain point processes, the configuration of points outside a bounded domain determines, with probability 1, certain statistical features of the points within the domain. This notion, called rigidity, was introduced in Ghosh and Peres (Duke Math J 166(10):1789�1858, 2017). In this paper, rigidity and the related notion of tolerance are examined systematically and point processes with rigidity of various degrees are introduced. Natural classes of point processes such as determinantal point processes, zero sets of Gaussian entire functions and perturbed lattices are examined from the point of view of rigidity, and general conditions are provided for them to exhibit specified nature of spatially rigid behaviour. In particular, we examine the rigidity of determinantal point processes in terms of their kernel, and demonstrate that a necessary condition for determinantal processes to exhibit rigidity is that their kernel must be a projection. We introduce a one parameter family of point processes which exhibit arbitrarily high levels of rigidity (depending on the choice of parameter value), answering a natural question on point processes with higher levels of rigidity (beyond the known examples of rigidity of local mass and center of mass). Our one parameter family is also related to a natural extension of the standard planar Gaussian analytic function process and their zero sets. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Item Type: Journal Article
Publication: Communications in Mathematical Physics
Publisher: Springer Science and Business Media Deutschland GmbH
Additional Information: The copyright for this article belongs to Springer Science and Business Media Deutschland GmbH
Department/Centre: Division of Physical & Mathematical Sciences > Mathematics
Date Deposited: 18 Nov 2021 09:25
Last Modified: 18 Nov 2021 09:25
URI: http://eprints.iisc.ac.in/id/eprint/70588

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