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gr-qc2024
A Mathematica program for numerically computing real and complex critical points in 4-dimensional Lorentzian spinfoam amplitude
Muxin Han, Hongguang Liu, Dongxue Qu
This work develops a comprehensive algorithm and a Mathematica program to construct boundary data and compute real and complex critical points in spinfoam amplitudes. Our approach…
gr-qc2024★ 10 cited
Spin foam amplitude of the black-to-white hole transition
Muxin Han, Dongxue Qu, Cong Zhang
It has been conjectured that quantum gravity effects may cause the black-to-white hole transition due to quantum tunneling. The transition amplitude of this process is explored wit…
gr-qc2024
Cosmological Dynamics from Covariant Loop Quantum Gravity with Scalar Matter
Muxin Han, Hongguang Liu, Dongxue Qu +2
We study homogenous and isotropic quantum cosmology using the spinfoam formalism of Loop Quantum Gravity (LQG). We define a coupling of a scalar field to the 4-dimensional Lorentzi…