Thermal transport in $T\bar{T}$-deformed conformal field theories: from integrability to holography

Abstract

In this paper we consider the energy and momentum transport in (1+1)-dimension conformal field theories (CFTs) that are deformed by an irrelevant operator $T\bar{T}$, using the integrability based generalized hydrodynamics, and holography. The two complementary methods allow us to study the energy and momentum transport after the in-homogeneous quench, derive the exact non-equilibrium steady states (NESS) and calculate the Drude weights and the diffusion constants. Our analysis reveals that all of these quantities satisfy universal formulae regardless of the underlying CFT, thereby generalizing the universal formulae for these quantities in pure CFTs. As a sanity check, we also confirm that the exact momentum diffusion constant agrees with the conformal perturbation. These fundamental physical insights have important consequences for our understanding of the $T\bar{T}$-deformed CFTs. First of all, they provide the first check of the $T\bar{T}$-deformed ${\mathrm{AdS}}_3$/${\mathrm{CFT}}_2$ correspondence from the dynamical standpoint. And secondly, we are able to identify a remarkable connection between the $T\bar{T}$-deformed CFTs and reversible cellular automata.

v1: 18 pages, 3 figures. v2: 20 pages, 3 figures, substantially improved results including a general derivation of the momentum diffusion constant. v3: Fig. 1 corrected, explanations improved. Published version

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Cited by in corpus (13)

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• $T\bar{T}$-deformed conformal field theories out of equilibrium
• Integrable hard rod deformation of the Heisenberg spin chains
• Gravity and $T\bar{T}$ flows in higher dimensions
• $\mathrm{T}\overline{\mathrm{T}}$-deformed 1d Bose gas
• Steady States of Holographic Interfaces
• Holographic study of $T\bar{T}$ like deformed HV QFTs: holographic entanglement entropy
• Integrable deformations of superintegrable quantum circuits
• An integrable spin chain with Hilbert space fragmentation and solvable real time dynamics
• $T\overline{T}$ deformations and the width of fundamental particles
• Universal thermalization dynamics in (1+1)d QFTs