10 papers
Gravitational multipoles, antipodal matching relations, and the logarithmic soft graviton theorem
Geoffrey Compère, Dima Fontaine, Wen-Bin Liu +1
We derive the classical logarithmic soft graviton theorem for the scattering of massive particles in four-dimensional asymptotically flat spacetime using a position-space analysis…
Covariant variation and its applications
Wen-Bin Liu, Jiang Long
We define a covariant variation of tensor fields by combining its Lie derivative with the metric variation. This operator preserves the metric, contractions, and Hodge duality, but…
Extrapolating the massive fields to future timelike infinity
Wen-Bin Liu, Jiang Long
It is well-known that future timelike infinity () in four-dimensional Minkowski spacetime is conformal to the unit three-dimensional hyperboloid (). We asymptotically exp…
Quantum flux operators in the fermionic theory and their supersymmetric extension
Si-Mao Guo, Wen-Bin Liu, Jiang Long
We construct quantum flux operators with respect to the Poincaré symmetry in the massless Dirac theory at future null infinity. An anomalous helicity flux operator emerges from the…
On the definition of Carrollian amplitudes in general dimensions
Wen-Bin Liu, Jiang Long, Hong-Yang Xiao +1
Carrollian amplitude is the natural object that defines the correlator of the boundary Carrollian field theory. In this work, we will elaborate on its proper definition in general…
Electromagnetic helicity flux operators in higher dimensions
Wen-Bin Liu, Jiang Long, Xin-Hao Zhou
The helicity flux operator is a fascinating quantity that characterizes the angular distribution of the helicity of radiative photons or gravitons and it has many interesting physi…
Feynman rules and loop structure of Carrollian amplitudes
Wen-Bin Liu, Jiang Long, Xiao-Quan Ye
In this paper, we derive the Carrollian amplitude in the framework of bulk reduction. The Carrollian amplitude is shown to relate to the scattering amplitude by a Fourier transform…
Holographic dictionary from bulk reduction
Wen-Bin Liu, Jiang Long
We propose a holographic dictionary which comes from reducing the bulk theories in an asymptotically flat spacetime to its null infinity. A general boundary theory is characterized…
Quantum flux operators in higher spin theories
Wen-Bin Liu, Jiang Long, Xin-Hao Zhou
We construct Carrollian higher spin field theories by reducing the bosonic Fronsdal theories in flat spacetime to future null infinity. We extend the Poincaré fluxes to quantum flu…
Quantum flux operators for Carrollian diffeomorphism in general dimensions
Ang Li, Wen-Bin Liu, Jiang Long +1
We construct Carrollian scalar field theories in general dimensions, mainly focusing on the boundaries of Minkowski and Rindler spacetime, whose quantum flux operators form a faith…