Janossy densities for chiral random matrix ensembles and their applications to two-color QCD

• Main Authors: Hiroyuki Fuji, Issaku Kanamori, Shinsuke M. Nishigaki
• Format: Article
• Language: English
• Published: SpringerOpen 2019-08-01
• Series: Journal of High Energy Physics
• Subjects: Matrix Models; Lattice QCD; Stochastic Processes
• Online Access: http://link.springer.com/article/10.1007/JHEP08(2019)053

Abstract We compute individual distributions of low-lying eigenvalues of massive chiral random matrix ensembles by the Nyström-type quadrature method for evaluating the Fredholm determinant and Pfaffian that represent the analytic continuation of the Janossy densities (conditional gap probabilities). A compact formula for individual eigenvalue distributions suited for precise numerical evaluation by the Nyström-type method is obtained in an explicit form, and the k th smallest eigenvalue distributions are numerically evaluated for chiral unitary and symplectic ensembles in the microscopic limit. As an application of our result, the low-lying Dirac spectra of the SU(2) lattice gauge theory with N F = 8 staggered flavors are fitted to the numerical prediction from the chiral symplectic ensemble, leading to a precise determination of the chiral condensate of a two-color QCD-like system in the future.