Partial-Skew-Orthogonal Polynomials and Related Integrable Lattices with Pfaffian Tau-Functions

doi:10.1007/s00220-018-3273-y

	Partial-Skew-Orthogonal Polynomials and Related Integrable Lattices with Pfaffian Tau-Functions
	Chang, Xiang-Ke1,2 ; He, Yi 3; Hu, Xing-Biao1,2 ; Li, Shi-Hao 1,2
	2018-12-01
发表期刊	COMMUNICATIONS IN MATHEMATICAL PHYSICS
ISSN	0010-3616
卷号	364 期号:3 页码:1069-1119
摘要	Skew-orthogonal polynomials (SOPs) arise in the study of the n-point distribution function for orthogonal and symplectic random matrix ensembles. Motivated by the average of characteristic polynomials of the Bures random matrix ensemble studied in Forrester and Kieburg (Commun Math Phys 342(1):151-187, 2016), we propose the concept of partial-skew-orthogonal polynomials (PSOPs) as a modification of the SOPs, and then the PSOPs with a variety of special skew-symmetric kernels and weight functions are addressed. By considering appropriate deformations of the weight functions, we derive nine integrable lattices in different dimensions. As a consequence, the tau-functions for these systems are shown to be expressed in terms of Pfaffians and the wave vectors PSOPs. In fact, the tau-functions also admit the multiple integral representations. Among these integrable lattices, some of them are known, while the others are novel to the best of our knowledge. In particular, one integrable lattice is related to the partition function of the Bures ensemble. Besides, we derive a discrete integrable lattice which can be used to compute certain vector Pade approximants. This yields the first example regarding the connection between integrable lattices and generalised inverse vector-valued Pade approximants, about which Hietarinta, Joshi, and Nijhoff pointed out that, This field remains largely to be explored, in the recent monograph (Hietarinta etal. in Discrete systems and integrability, vol 54. Cambridge University Press, Cambridge, 2016, [Section 4.4]).
DOI	10.1007/s00220-018-3273-y
语种	英语
资助项目	National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; [11701550] ; [11731014] ; [11571358] ; [11331008]
WOS研究方向	Physics
WOS类目	Physics, Mathematical
WOS记录号	WOS:000451726400005
出版者	SPRINGER
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/31858
专题	计算数学与科学工程计算研究所
通讯作者	Li, Shi-Hao
作者单位	1.Chinese Acad Sci, Acad Math & Syst Sci, ICMSEC, LSEC, POB 2719, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Math Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Chang, Xiang-Ke,He, Yi,Hu, Xing-Biao,et al. Partial-Skew-Orthogonal Polynomials and Related Integrable Lattices with Pfaffian Tau-Functions[J]. COMMUNICATIONS IN MATHEMATICAL PHYSICS,2018,364(3):1069-1119.
APA	Chang, Xiang-Ke,He, Yi,Hu, Xing-Biao,&Li, Shi-Hao.(2018).Partial-Skew-Orthogonal Polynomials and Related Integrable Lattices with Pfaffian Tau-Functions.COMMUNICATIONS IN MATHEMATICAL PHYSICS,364(3),1069-1119.
MLA	Chang, Xiang-Ke,et al."Partial-Skew-Orthogonal Polynomials and Related Integrable Lattices with Pfaffian Tau-Functions".COMMUNICATIONS IN MATHEMATICAL PHYSICS 364.3(2018):1069-1119.