3 papers
hep-th2021
Conformal Wave Expansions for Flat Space Amplitudes
Chang Liu, David A. Lowe
The extended BMS algebra contains a conformal subgroup that acts on the celestial sphere as SO(3,1). It is of interest to perform mode expansions of free fields in Minkowski spacet…
hep-th2019
Holographic Map for Cosmological Horizons
Chang Liu, David A. Lowe
We propose a holographic map between Einstein gravity coupled to matter in a de Sitter background and large N quantum mechanics of a system of spins. Holography maps a spin model w…
hep-th2018
Notes on Scrambling in Conformal Field Theory
Chang Liu, David A. Lowe
The onset of quantum chaos in quantum field theory may be studied using out-of-time-order correlators at finite temperature. Recent work argued that a timescale logarithmic in the…