Quintic-kernel conjecture for the process at touching Pearcey cusps

The quintic kernel is defined by

KQ(θ,η;x,y)=1(2πi)2CdzC~dz~1zz~e2z5/5θz3/3ηz2+zxe2z~5/5θz~3/3ηz~2+z~y,K^\mathcal{Q}(\theta,\eta;x,y)=\frac{1}{(2\pi i)^2}\int_{\mathcal{C}} dz\int_{\tilde{\mathcal{C}}}d\tilde z\,\frac{1}{z-\tilde z}\frac{e^{2z^5/5-\theta z^3/3-\eta z^2+zx}}{e^{2\tilde z^5/5-\theta\tilde z^3/3-\eta\tilde z^2+\tilde zy}},

where the zz- and z~\tilde z-integration paths are appropriate subpaths of the paths shown in the source figure, with the indicated orientation. Quintic-kernel conjecture. The gap probability for the new process appearing when the two Pearcey cusps touch is given by the Fredholm determinant associated with KQK^\mathcal{Q}. The proposed process would represent a new universality class at the point where the two Pearcey cusps meet, but the source presents this as a possible emerging process rather than establishing the Fredholm-determinant description; its resolution is not stated.

Sources & referencesView supporting material

Primary source

Mark Adler, Patrik L. Ferrari and Pierre van Moerbeke, “Airy processes with wanderers and new universality classes”, arXiv:0811.1863 (2010).

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