A modification of the Chen-Nester quasilocal expressions
Lau Loi So
TL;DR
This paper introduces a two-parameter family of modified boundary expressions in the covariant Hamiltonian formalism, enhancing the calculation of gravitational energy-momentum in holonomic frames.
Contribution
It generalizes Chen and Nester's four boundary expressions to a two-parameter set, providing improved tools for quasilocal gravitational energy-momentum calculations.
Findings
New two-parameter boundary expressions for quasilocal quantities
Enhanced gravitational energy-momentum results in holonomic frames
Simplified generalization of existing boundary expressions
Abstract
Chen and Nester proposed four boundary expressions for the quasilocal quantities using the covariant Hamiltonian formalism. Based on these four expressions, there is a simple generalization that one can consider, so that a two parameter set of boundary expressions can be constructed. Using these modified expressions, a nice result for gravitational energy-momentum can be obtained in holonomic frames.
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