Speaker
Description
We introduce a new family of 1+1-dimensional integrable quantum field theories (IQFTs). Starting from multi-CDD models whose Thermodynamic Bethe Ansatz displays Hagedorn-type branch points, we apply a finely tuned T Tbar deformation to construct candidate UV-complete theories whose high-energy state counting is not Cardy-like. At the critical point, the leading Hagedorn growth is removed, while a subleading branch survives and produces the anomalous scaling log Z(beta) ~ beta^(-1/3) and S(E) ~ E^(1/4).
The resulting theories are integrable, UV complete and still relativistic, but not governed by an ordinary local conformal fixed point. In this sense the completion is anomalous: the ultraviolet density of states is much sparser than Cardy growth, suggesting a probably non-local organization of the UV degrees of freedom. The aim of this work in progress is to understand what these models are, what structure is hidden in their ultraviolet regime, and what transport properties they possess.