@inproceedings{784e7bb0d7b74365841c3c52691e2f05,

title = "On the choice of reference for the covariant Hamiltonian boundary term",

abstract = "The Hamiltonian for dynamic geometry gravity theories generates the dynamical evolution of a spatial region along a time-like vector field. It includes a boundary term, which determines both the value of the Hamiltonian and the boundary conditions. From the value one obtains the quasi-local quantities: energy-momentum, angular-momentum/center-of-mass. The boundary term depends not only on the dynamical variables but also on their reference values, which determine the ground state (with vanishing quasi-local values). For our preferred boundary term for Einstein{\textquoteright}s GR we propose 4D isometric matching and extremizing the energy to determine the reference metric and connection values. The quasi-local energy values for spherically symmetric metrics have been calculated.",

author = "Nester, {James M.} and Chen, {Chiang Mei} and Liu, {Jian Liang} and Wu, {Ming Fan}",

note = "Publisher Copyright: {\textcopyright} Rencontres du Vietnam All rights reserved.; 10th International conference on Gravitation, Astrophysics and Cosmology, ICGAC 2011 ; Conference date: 15-12-2011 Through 21-12-2011",

year = "2011",

language = "???core.languages.en_GB???",

series = "Proceedings of the 10th International conference on Gravitation, Astrophysics and Cosmology, ICGAC 2011",

publisher = "The Gioi Publishers",

pages = "272--276",

editor = "Roland Triay and {Tran Thanh Van}, Jean and Celnikier, {Ludwik M.}",

booktitle = "Proceedings of the 10th International conference on Gravitation, Astrophysics and Cosmology, ICGAC 2011",

}