Abstract
We introduce new families of determinantal point processes (DPPs) on a complex plane \({{\mathbb{C}}}\), which are classified into seven types following the irreducible reduced affine root systems, RN = AN−1, BN, \({B^{\vee}_N}\), CN, \({C^{\vee}_N}\), BCN, DN, \({N \in {\mathbb{N}}}\). Their multivariate probability densities are doubly periodic with periods (L, iW), \({0 < L, W < \infty}\), \({i=\sqrt{-1}}\). The construction is based on the orthogonality relations with respect to the double integrals over the fundamental domain, \({[0, L) \times i [0, W)}\), which are proved in this paper for the \({R_N}\)-theta functions introduced by Rosengren and Schlosser. In the scaling limit \({N \to \infty, L \to \infty}\) with constant density \({\rho=N/(LW)}\) and constant W, we obtain four types of DPPs with an infinite number of points on \({{\mathbb{C}}}\), which have periodicity with period iW. In the further limit \({W \to \infty}\) with constant \({\rho}\), they are degenerated into three infinite-dimensional DPPs. One of them is uniform on \({{\mathbb{C}}}\) and equivalent with the Ginibre point process studied in random matrix theory, while other two systems are rotationally symmetric around the origin, but non-uniform on \({{\mathbb{C}}}\). We show that the elliptic DPP of type AN-1 is identified with the particle section, obtained by subtracting the background effect, of the two-dimensional exactly solvable model for one-component plasma studied by Forrester. Other two exactly solvable models of one-component plasma are constructed associated with the elliptic DPPs of types CN and DN. Relationship to the Gaussian free field on a torus is discussed for these three exactly solvable plasma models.
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Acknowledgements
On sabbatical leave from Chuo University, this study was done in Fakultät für Mathe matik, Universität Wien, in which the present author thanks Christian Krattenthaler very much for his hospitality. The author thanks Peter John Forrester for useful comments on the two-dimensional Coulomb gas models. He also expresses his gratitude to Michael Schlosser and Tomoyuki Shirai for valuable discussion concerning the present study. This work was supported by the Grant-in-Aid for Scientific Research (C) (No. 26400405), (B) (No. 18H01124), and (S) (No. 16H06338) of Japan Society for the Promotion of Science. It was also supported by the Research Institute for Mathematical Sciences (RIMS), a Joint Usage/Research Center located in Kyoto University. The author thanks Naotaka Kajino, Takashi Kumagai, and Daisuke Shiraishi for organizing the very fruitful workshop, ‘RIMS Research Project: Gaussian Free Fields and Related Topics’, held in 18–21 September 2018 at RIMS.
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On sabbatical leave from Department of Physics, Faculty of Science and Engineering, Chuo University, Kasuga, Bunkyo-ku, Tokyo, 112-8551, Japan.
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Katori, M. Two-Dimensional Elliptic Determinantal Point Processes and Related Systems. Commun. Math. Phys. 371, 1283–1321 (2019). https://doi.org/10.1007/s00220-019-03351-5
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DOI: https://doi.org/10.1007/s00220-019-03351-5