Critical behavior in topological ensembles

Abstract

We consider the relation between three physical problems: 2D directed lattice random walks, ensembles of $T_{n,n+1}$ torus knots, and instanton ensembles in 5D SQED with one compact dimension in $\Omega$ background and with 5D Chern-Simons term at the level one. All these ensembles exhibit the critical behavior typical for the "area+length+corners" statistics of grand ensembles of 2D directed paths. Using the combinatorial description, we obtain an explicit expression of the generating function for $q$-Narayana numbers which amounts to the new critical behavior in the ensemble of $T_{n,n+1}$ torus knots and in the ensemble of instantons in 5D SQED. Depending on the number of the nontrivial fugacities, we get either the critical point, or cascade of critical lines and critical surfaces. In the 5D gauge theory the phase transition is of the 3rd order, while in the ensemble of paths and ensemble of knots it is typically of the 1st order. We also discuss the relation with the integrable models.

13 pages, 8 figures; the paper is essentially reworked

References in corpus (5)

• Summing Up All Genus Free Energy of ABJM Matrix Model
• Refined Chern-Simons Theory and Topological String
• A remark on the Hankel determinant formula for solutions of the Toda equation
• q-Catalan numbers and q-Narayana polynomials
• Pressure exerted by a vesicle on a surface

Cited by in corpus (7)

• Donaldson-Thomas invariants, torus knots, and lattice paths
• Condensates and instanton - torus knot duality. Hidden Physics at UV scale
• The Condensate from Torus Knots
• Spontaneous Symmetry Breaking and Phase Coexistence in Two-Color Networks
• Hamiltonian and exclusion statistics approach to discrete forward-moving paths
• Length and area generating functions for height-restricted Motzkin meanders
• Instanton-torus knot duality in 5d SQED and $SU(2)$ SQCD