92 citations · 112 across the 6 of their papers we have counts for
6 papers
Krylov Complexity in Open Quantum Systems
Chang Liu, Haifeng Tang, Hui Zhai
Krylov complexity is a novel measure of operator complexity that exhibits universal behavior and bounds a large class of other measures. In this letter, we generalize Krylov comple…
Conformal Wavefunctions for Graviton Amplitudes
Chang Liu, David A. Lowe
The extended-BMS algebra of asymptotically flat spacetime contains an SO(3,1) subgroup that acts by conformal transformations on the celestial sphere. It is of interest to study th…
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…
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…
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…
Two-Scale Oscillons
Chang Liu, Richard Easther
Oscillons are spatially stationary, quasi-periodic solutions of nonlinear field theories seen in settings ranging from granular systems, low temperature condensates and early unive…