4 papers
Gravitational Faraday rotation, gravitational spin Hall effect, and spin-refined causality analysis from Magnusian matrix in effective field theories of gravity
Kibok Jeong, Jung-Wook Kim, Soochang Lee
The effects of black hole's spin in effective field theories (EFTs) of gravity are explored through observables of wave scattering on black hole backgrounds in the geometric optics…
The Diagrammar of Quantum Magnusian
Li Guo, Joon-Hwi Kim, Jung-Wook Kim +3
The logarithm of the time-evolution operator has been termed Magnusian, on account of the fact that its expansion describes the Magnus series. The diagrammatic expansion and comput…
Twisted Feynman Integrals: from generating functions to spin-resummed post-Minkowskian dynamics
Joon-Hwi Kim, Jung-Wook Kim, Jungwon Lim
We propose to call a class of deformed Feynman integrals as twisted Feynman integrals, where the integrand has an additional exponential factor linear in loop momenta. Such integra…
Magnusian: Relating the Eikonal Phase, the On-Shell Action, and the Scattering Generator
Jung-Wook Kim, Raj Patil, Trevor Scheopner +1
Two fundamentally distinct types of quantities are both called "eikonal" in present amplitudes literature. The unitarity of the S-matrix ensures it can be written as the exponentia…