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In physics, the Cooperstock's energy-localization hypothesis is a hypothesis proposed by Fred Cooperstock that in general relativity, energy only exists in regions of non-vanishing energy–momentum tensor.〔F.I. Cooperstock, Found. Phys. 22, 1011 (1992)〕 Since the creation of general relativity there have been questions about the energy of gravitational fields. Among the proposals for the energy are the Landau–Lifshitz pseudotensor, Einstein pseudotensor, and the Møller superpotential. In Misner, Thorne & Wheeler〔Misner, Charles; Thorne, Kip S. & Wheeler, John Archibald (1973). Gravitation. San Francisco: W. H. Freeman. ISBN 0-7167-0344-0.〕 the authors claimed that energy can only be localized for spherical systems, which Cooperstock & Sarracino 〔F.I. Cooperstock and R.S. Sarracino, J. Phys. A11, 877 (1978)〕 demonstrated implies that energy must be localized for all systems, while Bondi 〔H. Bondi, Proc. R. Soc. London A427,249 (1990)〕 argued that non-localizable energy is not allowed in general relativity. The energy localization hypothesis has also been proven for a number of specific examples (see for example Ref 〔S.S. Xulu, Mod. Phys. Lett. A15, 1511 (2000); Int. J. Mod. Phys. A15, 4849 (2000)〕), but has not been proven or disproven in general. Feynman's sticky bead argument shows that energy is transported by gravitational waves, which is difficult to make compatible with the Cooperstock's hypothesis. ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cooperstock's energy-localization hypothesis」の詳細全文を読む スポンサード リンク
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