期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 11, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP11(2011)032
关键词
Cosmology of Theories beyond the SM; Classical Theories of Gravity
资金
- Chinese Academy of Sciences [2010Y2JA01]
- National Science Council of R.O.C. [NSC99-2112-M-033-005-MY3, NSC99-2811-M-033-008]
- National Center for Theoretical Sciences
It has long been known that generic solutions to the nonlinear DGP and Galileon models admit superluminal propagation. In this note we present a solution of these models which also admits closed timelike curves (CTCs). We observe that CTCs only arise when, according to each observer, there exists some region in which the higher derivative terms are larger than the 2-derivative kinetic term
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