Interacting Conformal Carrollian Theories: Cues from Electrodynamics

Dynamical structure of Carrollian Electrodynamics

We present an action of ultra-relativistic electrodynamics on a flat Carroll manifold. The model exhibits a couple of physical degrees of freedom per space-point. We observe that the action of the conformal Carroll algebra on the phase space is Hamiltonian in 4 space-time dimensions. Moreover the elements of the algebra give rise to an infinite number of conserved charges and the charge algebra is an exact realization of the kinematical algebra.

Carrollian轴子电动力学

Carrollian axion electrodynamics

本文构建了Carrollian轴子电动力学理论，通过$c \ o 0$展开得到电型和磁型两类，发现磁型理论中存在Witten效应的Carrollian类比，但线性磁电效应消失。

Field Theories on Null Manifolds

We argue that generic field theories defined on null manifolds should have an emergent BMS or conformal Carrollian structure. We then focus on a simple interacting conformal Carrollian theory, viz. Carrollian scalar electrodynamics. We look at weak (on-shell) and strong invariance (off-shell) of its equations of motion under conformal Carrollian symmetries. Helmholtz conditions are necessary and sufficient conditions for a set of equations to arise from a Lagrangian. We investigate whether the equations of motion of Carrollian scalar electrodynamics satisfy these conditions. Then we proposed a…

来自高维引力的Fracton规范场

Fracton gauge fields from higher-dimensional gravity

本文通过Poincaré代数的高维Aristotelian收缩，从相对论性高维理论经维度约化导出fracton电动力学，并给出了弯曲空间下的规范不变推广。

Flat Holography: Aspects of the dual field theory

Assuming the existence of a field theory in D dimensions dual to (D+1)-dimensional flat space, governed by the asymptotic symmetries of flat space, we make some preliminary remarks about the properties of this field theory. We review briefly some successes of the 3d bulk - 2d boundary case and then focus on the 4d bulk - 3d boundary example, where the symmetry in question is the infinite dimensional BMS4 algebra. We look at the constraints imposed by this symmetry on a 3d field theory by constructing highest weight representations of this algebra. We construct two and three point functions of …