1 citations · 1 across the 2 of their papers we have counts for
8 papers
Quasilocal Center-of-Mass
James M. Nester, Feng-Feng Meng, Chiang-Mei Chen
Gravitating systems have no well-defined local energy-momentum density. Various quasilocal proposals have been made, however the center-of-mass moment (COM) has generally been over…
Spinor Formulations for Gravitational Energy-Momentum
Chiang-Mei Chen, James M. Nester, Roh-Suan Tung
We first describe a class of spinor-curvature identities (SCI) which have gravitational applications. Then we sketch the topic of gravitational energy-momentum, its connection with…
Gravitational Energy-Momentum in MAG
James M. Nester, Chiang-Mei Chen, Yu-Heui Wu
Energy-momentum (and angular momentum) for the Metric-Affine Gravity theory is considered from a Hamiltonian perspective (linked with the Noether approach). The important roles of…
Gravitational Energy-Momentum in the Tetrad and Quadratic Spinor Representations of General Relativity
Roh S. Tung, James M. Nester
In the Tetrad Representation of General Relativity, the energy-momentum expression, found by Moller in 1961, is a tensor wrt coordinate transformations but is not a tensor wrt loca…
A Symplectic Hamiltonian Derivation of Quasilocal Energy-Momentum for GR
Chiang-Mei Chen, James M. Nester
The various roles of boundary terms in the gravitational Lagrangian and Hamiltonian are explored. A symplectic Hamiltonian-boundary-term approach is ideally suited for a large clas…
Energy-Momentum (Quasi-)Localization for Gravitating Systems
Chia-Chen Chang, James M. Nester, Chiang-Mei Chen
Traditional approaches to energy-momentum localization led to reference frame dependent pseudotensors. The more modern idea is quasilocal energy-momentum. We take a Hamiltonian app…