کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10725617 | 1034146 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hamiltonian analysis of linearized extension of HoÅava-Lifshitz gravity
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
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چکیده انگلیسی
We investigate the Hamiltonian structure of linearized extended HoÅava-Lifshitz gravity in a flat cosmological background following the Faddeev-Jackiw's Hamiltonian reduction formalism. The Hamiltonian structure of extended HoÅava-Lifshitz gravity is similar to that of the projectable version of original HoÅava-Lifshitz gravity, in which there is one primary constraint and so there are two physical degrees of freedom. In the infrared (IR) limit, however, there is one propagating degree of freedom in the general cosmological background, and that is coupled to the scalar graviton mode. We find that extra scalar graviton mode in an inflationary background can be decoupled from the matter field in the IR limit. But it is necessary to go beyond linear order in order to draw any conclusion of the strong coupling problem.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 696, Issue 4, 7 February 2011, Pages 426-431
Journal: Physics Letters B - Volume 696, Issue 4, 7 February 2011, Pages 426-431
نویسندگان
Seoktae Koh, Sunyoung Shin,