3 papers
math.QA2023
Analytic Conformal Blocks of -cofinite Vertex Operator Algebras I: Propagation and Dual Fusion Products
Bin Gui, Hao Zhang
This is the first paper of a three-part series in which we develop a theory of conformal blocks for -cofinite vertex operator algebras (VOAs) that are not necessarily rational…
math.NT2021
Generic Newton polygons for -functions of -exponential sums
Liping Yang, Hao Zhang
In this paper, we consider the following -polynomial over finite field: where is a De…
cond-mat.str-el2020
Exact resummation of the Holstein-Primakoff expansion and differential equation approach to operator square-roots
Michael Vogl, Pontus Laurell, Hao Zhang +2
Operator square-roots are ubiquitous in theoretical physics. They appear, for example, in the Holstein-Primakoff representation of spin operators and in the Klein-Gordon equation.…