Quasilocal Center-of-Mass

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dc.creatorNester, James M.
dc.creatorMeng, Feng-Feng
dc.creatorChen, Chiang-Mei
dc.date2004-03-25
dc.date2004-04-27
dc.date.accessioned2026-07-07T03:28:33Z
dc.date.available2026-07-07T03:28:33Z
dc.descriptionGravitating 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 overlooked. Asymptotically flat graviating systems have 10 total conserved quantities associated with the Poincar{é} symmetry at infinity. In addition to energy-momentum and angular momentum (associated with translations and rotations) there is the boost quantity: the COM. A complete quasilocal formulation should include this quantity. Getting good values for the COM is a fairly strict requirement, imposing the most restrictive fall off conditions on the variables. We take a covariant Hamiltonian approach, associating Hamiltonian boundary terms with quasilocal quantities and boundary conditions. Unlike several others, our {\it covariant symplectic} quasilocal expressions do have the proper asymptotic form for all 10 quantities.
dc.description4 pages, contribution to the 6th International Conference of Gravitation and Astrophysics, Seoul, 2003 (revised version)
dc.identifierhttps://arxiv.org/abs/gr-qc/0403103
dc.identifierhttp://arxiv.org/abs/gr-qc/0403103
dc.identifierJ.Korean Phys.Soc. 45 (2004) S22-S25
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/34875
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleQuasilocal Center-of-Mass
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