49 citations · 177 across the 12 of their papers we have counts for
9 papers · 1 filter
Quantum induced shock dynamics in gravitational collapse: insights from effective models and numerical frameworks
Hongguang Liu, Dongxue Qu
We explore the formation and evolution of shock waves in spherically symmetric gravitational collapse within a Loop Quantum Gravity (LQG) inspired effective framework. In this sett…
Properties of 4D spinfoam quantum geometry: Results from next-to-leading order spinfoam large- asymptotics of 1-5 Pachner move
Haida Li, Muxin Han, Hongguang Liu +2
This paper proposes several criteria to probe the non-trivialities of 4-dimensional geometry that impact spinfoam amplitude. These criteria include the standard deviation of 4-volu…
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…
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…
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…
Complex critical points in Lorentzian spinfoam quantum gravity: 4-simplex amplitude and effective dynamics on double- complex
Muxin Han, Hongguang Liu, Dongxue Qu
The complex critical points are analyzed in the 4-dimensional Lorentzian Engle-Pereira-Rovelli-Livine (EPRL) spinfoam model in the large- regime. For the 4-simplex amplitude, ta…
Complex critical points and curved geometries in four-dimensional Lorentzian spinfoam quantum gravity
Muxin Han, Zichang Huang, Hongguang Liu +1
This paper focuses on the semiclassical behavior of the spinfoam quantum gravity in 4 dimensions. There has been long-standing confusion, known as the flatness problem, about wheth…
Spinfoam on Lefschetz Thimble: Markov Chain Monte-Carlo Computation of Lorentzian Spinfoam Propagator
Muxin Han, Zichang Huang, Hongguang Liu +2
We compute numerically the Lorentzian Engle-Pereira-Rovelli-Livine (EPRL) spinfoam propagator on a 4-simplex, by adapting the methods of Lefschetz thimble and Markov Chain Monte-Ca…
Numerical computations of next-to-leading order corrections in spinfoam large- asymptotics
Muxin Han, Zichang Huang, Hongguang Liu +1
We numerically study the next-to-leading order corrections of the Lorentzian Engle-Pereira-Rovelli-Livine (EPRL) 4-simplex amplitude in the large- expansions. We perform large-$…