PIRSA:21010011

Universal thermal transport in TTbar-deformed conformal field theories

Yoshimura, T. (2021). Universal thermal transport in TTbar-deformed conformal field theories . Perimeter Institute. https://pirsa.org/21010011

Yoshimura, Takato. Universal thermal transport in TTbar-deformed conformal field theories . Perimeter Institute, Jan. 12, 2021, https://pirsa.org/21010011 

          @misc{ pirsa_PIRSA:21010011,
            doi = {10.48660/21010011},
            url = {https://pirsa.org/21010011},
            author = {Yoshimura, Takato},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {Universal thermal transport in TTbar-deformed conformal field theories },
            publisher = {Perimeter Institute},
            year = {2021},
            month = {jan},
            note = {PIRSA:21010011 see, \url{https://pirsa.org}}
          }

Takato Yoshimura

Tokyo Institute of Technology

Talk number
PIRSA:21010011
Collection
Talk Type
Subject
Abstract

In this talk I will discuss the universal properties of thermal transport in conformal field theories that are perturbed by a TTbar operator. TTbar-deformation is known to be an exactly solvable deformation in that the spectrum of the undeformed theory alone suffices to predict that of the deformed theory. Unique properties of TTbar deformation allow us to study the TTbar-deformed CFTs using two disparate methods: integrability and holography. I will apply these two approaches to study the non-equilibrium steady states and Drude weights, finding perfect agreement. I will also explain how the integrability-based approach yields the exact momentum diffusion constant, which, to our surprise, also happens to satisfy a universal formula. Finally I will briefly touch upon a curious connection between TTbar-deformed CFTs and an integrable cellular automaton model called the Rule 54 chain.