27 citations · 41 across the 4 of their papers we have counts for
11 papers
Fermions on Quantum Geometry and Resolution of Doubling Problem
Cong Zhang, Hongguang Liu, Muxin Han
The fermion doubling problem has an important impact on quantum gravity, by revealing the tension between fermion and the fundamental discreteness of quantum spacetime. In this wor…
Superposition type coherent states in all dimensional loop quantum gravity
Gaoping Long, Cong Zhang, Xiangdong Zhang
We propose a new kind of coherent state for the general formulation of loop quantum gravity in the -dimensional space-time. Instead of Thiemann's coherent state fo…
Relating spin-foam to canonical loop quantum gravity by graphical calculus
Jinsong Yang, Cong Zhang, Yongge Ma
The graphical calculus method is generalized to study the relation between covariant and canonical dynamics of loop quantum gravity. On one hand, a graphical derivation of the part…
Loop quantum cosmology from an alternative Hamiltonian. II. Including the Lorentzian term
Jinsong Yang, Cong Zhang, Yongge Ma
The scheme of using the Chern-Simons action to regularize the gravitational Hamiltonian constraint is extended to including the Lorentzian term in the cosmological model. The…
Koopman Operator and Phase Space Partition of Chaotic Maps
Cong Zhang, Yueheng Lan
Koopman operator describes evolution of observables in the phase space, which could be used to extract characteristic dynamical features of a nonlinear system. Here, we show that i…
Alternative dynamics in loop quantum Brans-Dicke cosmology
Shupeng Song, Cong Zhang, Yongge Ma
To inherit more features of full loop quantum Brans-Dicke theory, the Euclidean and Lorentzian terms of the Hamiltonian constraint are quantized independently in loop quantum Brans…