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题名: Conformal gravity and extensions of critical gravity
作者: Lu, H ;  Pang, Y ;  Pope, CN
刊名: PHYSICAL REVIEW D
出版日期: 2011
卷号: 84, 期号:6, 页码:64001
关键词: DIMENSIONS ;  ANOMALIES ;  ENERGY
学科分类: Physics
通讯作者: Lu, H (reprint author), Cent Univ Finance & Econ, China Econ & Management Acad, Beijing 100081, Peoples R China.
部门归属: [Lue, H.] Cent Univ Finance & Econ, China Econ & Management Acad, Beijing 100081, Peoples R China; [Lue, H.] Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China; [Pang, Yi] Chinese Acad Sci, Kavli Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China; [Pope, C. N.] Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 USA; [Pope, C. N.] Univ Cambridge, Ctr Math Sci, DAMTP, Cambridge CB3 OWA, England
英文摘要: Higher-order curvature corrections involving the conformally invariant Weyl-squared action have played a role in two recent investigations of four-dimensional gravity: in critical gravity, where they are added to the standard cosmological Einstein-Hilbert action with a coefficient tuned to make the massive ghostlike spin-2 excitations massless, and in a pure Weyl-squared action considered by Maldacena, where the massive spin-2 modes are removed by the imposition of boundary conditions. We exhibit the connections between the two approaches, and we also generalize critical gravity to a wider class of Weyl-squared modifications to cosmological Einstein gravity where one can eliminate the massive ghostlike spin-2 modes by means of boundary conditions. The cosmological constant plays a crucial role in the discussion, since there is then a "window'' of negative mass-squared spin-2 modes around AdS(4) that are not tachyonic. We also construct analogous conformal and nonconformal gravities in six dimensions.
资助者: NSFC [10535060/A050207, 10975172, 10821504]; Ministry of Science and Technology [2007CB815401]; DOE [DE-FG03-95ER40917]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000294405500009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14284
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Recommended Citation:
Lu, H,Pang, Y,Pope, CN. Conformal gravity and extensions of critical gravity[J]. PHYSICAL REVIEW D,2011,84(6):64001.
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