Jiaxin Qiao | EPFL Graph Search

A universal inequality on the unitary 2D CFT partition function

We prove the conjecture proposed by Hartman, Keller and Stoica (HKS) [1]: the grand-canonical free energy of a unitary 2D CFT with a sparse spectrum below the scaling dimension

\frac{c}{12}

+ ϵ and below the twist

\frac{c}{12}

is universal in the l ...

Springer Science and Business Media LLC2025

A radial variable for de Sitter two-point functions

Manuel Loparco, Jiaxin Qiao

We introduce a “radial” two-point invariant for quantum field theory in de Sitter (dS) analogous to the radial coordinate used in conformal field theory. We show that the two-point function of a free massive scalar in the Bunch-Davies vacuum has an exponen ...

Stichting SciPost2025

Quantum groups as global symmetries

Victor Gorbenko, Jiaxin Qiao, Barak Gabai

We study quantum field theories which have quantum groups as global internal symmetries. We show that in such theories operators are generically non-local, and should be thought as living at the ends of topological lines. We describe the general constraint ...

Springer Science and Business Media LLC2025