Publications (253)
Deformation: Introduction and Some Recent Advances
Song He, Yi Li, Hao Ouyang +1
This review explores recent advances in the theory of deformation, an irrelevant yet solvable deformation of quantum field theories defined via the quadratic form of the…
All-Loop Four-Point Aharony-Bergman-Jafferis-Maldacena Amplitudes from Dimensional Reduction of the Amplituhedron
Song He, Chia-Kai Kuo, Zhenjie Li +1
We define a new geometry obtained from the all-loop amplituhedron in SYM by reducing its four-dimensional external and loop momenta to three dimensions. Focusing on th…
Generalized -like Deformations in Duality-Invariant Nonlinear Electrodynamic Theories
H. Babaei-Aghbolagh, Song He, Hao Ouyang
This study introduces a high-order perturbation methodology to categorize two primary solution types within duality-invariant nonlinear electrodynamic theories, adhering to the dif…
One-loop Correlators and BCJ Numerators from Forward Limits
Alex Edison, Song He, Oliver Schlotterer +1
We present new formulas for one-loop ambitwistor-string correlators for gauge theories in any even dimension with arbitrary combinations of gauge bosons, fermions and scalars runni…
Genus Two Correlation Functions in CFTs with Deformation
Song He, Yun-Ze Li
Since the definition of deformation in the curved Riemann surface is obstructive in the literature, we propose a way to do the deformation in the genus two Riemann surfa…
String Correlators: Recursive Expansion, Integration-by-Parts and Scattering Equations
Song He, Fei Teng, Yong Zhang
We further elaborate on the general construction proposed in arXiv:1812.03369, which connects, via tree-level double copy, massless string amplitudes with color-ordered QFT amplitu…