81 citations · 232 across the 5 of their papers we have counts for
5 papers
Generalizations of the Double-Copy: the KLT Bootstrap
Huan-Hang Chi, Henriette Elvang, Aidan Herderschee +2
We formulate a new program to generalize the double-copy of tree amplitudes. The approach exploits the link between the identity element of the KLT algebra and the KLT kernel, and…
Graviton Bending in Quantum Gravity from One-Loop Amplitudes
Huan-Hang Chi
We study the bending of gravitons that pass near a massive object like the Sun, using scattering amplitudes in which the Sun is represented by a massive scalar particle. Our result…
Two-Loop Renormalization of Quantum Gravity Simplified
Zvi Bern, Huan-Hang Chi, Lance Dixon +1
The coefficient of the dimensionally regularized two-loop R^3 divergence of (nonsupersymmetric) gravity theories has recently been shown to change when non-dynamical three forms ar…
Evanescent Effects Can Alter Ultraviolet Divergences in Quantum Gravity without Physical Consequences
Zvi Bern, Clifford Cheung, Huan-Hang Chi +3
Evanescent operators such as the Gauss-Bonnet term have vanishing perturbative matrix elements in exactly D=4 dimensions. Similarly, evanescent fields do not propagate in D=4; a th…
Single-Valued Hamiltonian via Legendre-Fenchel Transformation and Time Translation Symmetry
Huan-Hang Chi, Hong-Jian He
Under conventional Legendre transformation, systems with a non-convex Lagrangian will result in a multi-valued Hamiltonian as a function of conjugate momentum. This causes problems…