49 citations · 215 across the 14 of their papers we have counts for
14 papers
Symmetry charges on reduced phase space and BMS algebra
Muxin Han, Zichang Huang, Hongwei Tan
This paper studies the reduced phase space formulation (relational formalism) of gravity coupling to the Brown-Kucha\v r dust for asymptotic flat spacetimes. A set of boundary cond…
Experimental Simulation of Loop Quantum Gravity on a Photonic Chip
Reinier van der Meer, Zichang Huang, Malaquias Correa Anguita +6
The unification of general relativity and quantum theory is one of the fascinating problems of modern physics. One leading solution is Loop Quantum Gravity (LQG). Simulating LQG ma…
A saddle-point finder and its application to the spin foam model
Zichang Huang, Shan Huang, Yidun Wan
We introduce a saddle-point finder that can find the complex saddle points for any analytically continued action. We showcase our saddle-point finder by two examples in the EPRL sp…
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…
Anyon Condensation: Coherent states, Symmetry Enriched Topological Phases, Goldstone Theorem, and Dynamical Rearrangement of Symmetry
Yuting Hu, Zichang Huang, Ling-yan Hung +1
Although the mathematics of anyon condensation in topological phases has been studied intensively in recent years, a proof of its physical existence is tantamount to constructing a…
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…
Observation of Two-Vertex Four-Dimensional Spin Foam Amplitudes with a 10-qubit Superconducting Quantum Processor
Pengfei Zhang, Zichang Huang, Chao Song +8
Quantum computers are an increasingly hopeful means for understanding large quantum many-body systems bearing high computational complexity. Such systems exhibit complex evolutions…
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-$…
Efficient Simulation of Loop Quantum Gravity -- A Scalable Linear-Optical Approach
Lior Cohen, Anthony J. Brady, Zichang Huang +4
The problem of simulating complex quantum processes on classical computers gave rise to the field of quantum simulations. Quantum simulators solve problems, such as Boson sampling,…
Emergent 4-dimensional linearized gravity from spin foam model
Muxin Han, Zichang Huang, Antonia Zipfel
Spin Foam Models (SFMs) are covariant formulations of Loop Quantum Gravity (LQG) in 4 dimensions. This work studies the perturbations of SFMs on a flat background. It demonstrates…
Spin foam propagator: A new perspective to include a cosmological constant
Muxin Han, Zichang Huang, Antonia Zipfel
In recent years, the calculation of the first non-vanishing order of the metric 2-point function or graviton propagator in a semiclassical limit has evolved as a standard test for…
Measuring Holographic Entanglement Entropy on a Quantum Simulator
Keren Li, Muxin Han, Dongxue Qu +6
Quantum simulation promises to have wide applications in many fields where problems are hard to model with classical computers. Various quantum devices of different platforms have…
Loop-Quantum-Gravity Simplicity Constraint as Surface Defect in Complex Chern-Simons Theory
Muxin Han, Zichang Huang
The simplicity constraint is studied in the context of 4d spinfoam models with cosmological constant. We find that the quantum simplicity constraint is realized as the 2d surface d…
SU(2) Flat Connection on Riemann Surface and Twisted Geometry with Cosmological Constant
Muxin Han, Zichang Huang
SU(2) flat connection on 2D Riemann surface is shown to relate to the generalized twisted geometry in 3D space with cosmological constant. Various flat connection quantities on Rie…